CN113877479A - Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application - Google Patents

Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application Download PDF

Info

Publication number
CN113877479A
CN113877479A CN202111080118.6A CN202111080118A CN113877479A CN 113877479 A CN113877479 A CN 113877479A CN 202111080118 A CN202111080118 A CN 202111080118A CN 113877479 A CN113877479 A CN 113877479A
Authority
CN
China
Prior art keywords
hydrothermal
bamboo powder
preparing
lima
bamboo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111080118.6A
Other languages
Chinese (zh)
Inventor
胡尚连
杨凡钦
任鹏
罗学刚
曹颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest University of Science and Technology
Original Assignee
Southwest University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest University of Science and Technology filed Critical Southwest University of Science and Technology
Priority to CN202111080118.6A priority Critical patent/CN113877479A/en
Publication of CN113877479A publication Critical patent/CN113877479A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/002—Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/04—Pressure vessels, e.g. autoclaves
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • C10L9/086—Hydrothermal carbonization
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention discloses a method for preparing hydrothermal carbon based on different genotype pleione arborescens and adsorption application, which comprises the following steps: step one, preparing the ciphigenia indica with different genotypes into bamboo powder, then adding the bamboo powder and water into a high-pressure reaction kettle, heating to 180-300 ℃, and preserving heat for 3-5 hours; naturally cooling to room temperature; and step two, centrifuging the feed liquid obtained in the step one by adopting a centrifugal machine, pouring out the supernatant, adding absolute ethyl alcohol, oscillating, centrifuging again, repeating the process until the supernatant is colorless and transparent, and drying the solid to constant weight to obtain the hydrothermal carbon. The hydrothermal carbon prepared from the pleione bulbocodioides has a large specific surface area and a good pore structure; a large number of functional groups are reserved; has better U (VI) reducing capability and better adsorption effect.

Description

Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application
Technical Field
The invention relates to the technical field of hydrothermal carbon preparation, in particular to a method for preparing hydrothermal carbon based on different genotype type pleione bamboos and adsorption application.
Background
Lima longissima belongs to the family Gramineae, the genus Musa, sympodial bamboo, is used as an important indigenous bamboo species and an economic bamboo species in southwest regions, is distributed in middle and north subtropical regions such as Yunnan, Guangxi, Sichuan and the like in China, and has considerable economic value. At present, the Limon iphigenia indica is mainly used for preparing virgin pulp in the paper making industry, and is also used for split bamboo skin weaving of various bamboo wares and used as structural materials of agricultural implement shed frames and the like. The bamboo shoots are delicious and tasty and are the main fresh bamboo shoot food material. But the application of the bamboo wood is still rough and shallow at present, the economic added value is low, the economic benefit is limited, and the industrial development is slow. The laboratory is engaged in the research of the Lima longissima for a long time to breed the Lima longissima with a plurality of genotypes, and lays a solid foundation for the subsequent hydrothermal charcoal research of the Lima longissima with different genotypes.
Nuclear energy is a recognized clean, efficient, safe and reliable energy source at present. Along with the application and development of nuclear energy, a large amount of uranium-containing wastewater is generated in related projects such as uranium ore mining, refining, purification, reaction power generation and the like, enters a river along with rainwater washing, enters an ecological circle, and enters and accumulates in a human body through the enrichment effect of a food chain. Uranium, a heavy metal element, is not only chemically toxic, but also radioactive. Uranium enrichment in the human body causes intense internal radiation in the human body, thereby causing various diseases, such as leukemia, cancer and the like. In previous researches, it is found that hexavalent uranium is more toxic than tetravalent uranium, and tetravalent uranium is easier to form stable complex precipitates with inorganic carbon and separate from water. Hexavalent uranium is typically Uranyl (UO)2 2+) In the form that uranyl is soluble in water, making separation difficult. Researchers have generally accepted the reduction of hexavalent uranium to tetravalent uranium as an effective treatment.
Bamboo charcoal occupies an important position in the aspects of water pollution control and the like with a developed specific surface area. Most bamboo charcoal is made by firing muffle furnace, tube furnace, earth cellar, etc. The bamboo charcoal fired at high temperature has a good pore structure, but a large number of functional groups are destroyed, which is not beneficial to uranium adsorption. The invention adopts a hydrothermal method to prepare the bamboo-based hydrothermal carbon, and a large amount of rich functional groups are reserved while a porous structure is reserved. The bamboo-based hydrothermal carbon with developed pore structure and rich functional groups has important significance for treating uranium-containing wastewater. In the prior art, the research on bamboo-based hydrothermal carbon rarely appears, and the research on the adsorption of heavy metal ions is not complete.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the present invention, there is provided a method for preparing a hydrothermal charcoal based on different genotypes of pleione bulbocodioides, comprising the steps of:
step one, preparing the ciphigenia indica with different genotypes into bamboo powder, then adding the bamboo powder and water into a high-pressure reaction kettle, heating to 180-300 ℃, and preserving heat for 3-5 hours; naturally cooling to room temperature;
and step two, centrifuging the feed liquid obtained in the step one by adopting a centrifugal machine, pouring out the supernatant, adding absolute ethyl alcohol, oscillating, centrifuging again, repeating the process until the supernatant is colorless and transparent, and drying the solid to constant weight to obtain the hydrothermal carbon.
Preferably, the Iphigenia indica of different genotypes are designated ZPX, 214, 215, 30-A and 52-B, respectively; wherein the cellulose content, lignin content and cellulose/lignin of the Lima spicata of different genotypes are shown in Table 1;
TABLE 1 physicochemical Properties of different genotypes of Lima longissima
Genotype(s) Cellulose content (%) Lignin content (%) Cellulose/lignin
ZPX 42.0695±0.0668e 15.9540±0.5629b 2.6434±0.0919cd
214 51.4595±0.4250b 17.8185±0.0071a 2.8880±0.0250bc
215 53.5340±0.0372a 17.3873±0.2097ab 3.0798±0.0358ab
30-A 43.7862±0.2211d 16.3482±0.1135ab 2.6785±0.0143cd
52-B 42.4151±0.1857e 16.4286±0.0483ab 2.5818±0.0037d
The process for preparing the bamboo powder from the Liriosa corchorifolia of different genotypes comprises the following steps: taking stems at the diameter of breast of the pleione bulbocodioides, removing bamboo rings, taking internodes, cleaning the surface with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, and collecting to obtain bamboo powder.
Preferably, in the second step, the centrifugation time is 10-15 min, the centrifugation temperature is 25 ℃, and the centrifugation rotating speed is 5000 rpm.
Preferably, in the step one, the bamboo powder is pretreated, and the pretreatment process comprises: adding the bamboo powder and the pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 30-45 min, filtering, and drying to obtain pretreated bamboo powder; the ultrasonic frequency of the microwave-ultrasonic wave mixing reaction device is 35-50 KHz, and the power is 500-650W; the microwave frequency is 915MHz or 2450MHz, and the power is 400-800W.
Preferably, the preparation method of the pretreatment solution comprises the following steps: adding 5-8 parts by weight of potassium ferrate, 1-3 parts by weight of zinc chloride and 1-2 parts by weight of urea into 80-100 parts by weight of water, and stirring for 10-20 min to obtain a pretreatment solution.
Preferably, the mass ratio of the bamboo powder to the pretreatment solution is 1: 15-30.
Preferably, in the second step, the obtained hydrothermal carbon is reprocessed, and the reprocessing process is as follows: mixing 1-5 parts of hydrothermal carbon and 40-60 parts of absolute ethyl alcohol according to parts by weight, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 235-245 ℃, keeping the temperature and pressure for 3-5 min when the pressure gauge reaches 5-7 MPa, naturally cooling, and performing vacuum drying to obtain the reprocessed hydrothermal carbon.
The invention also provides an adsorption application of the hydrothermal carbon to uranium in radioactive wastewater, and the hydrothermal carbon is added into a uranium-containing radioactive wastewater solution and then placed in a shaking bed at 25 ℃ and 150-200 rpm for adsorption for 18-26 h.
Preferably, the mass volume ratio of the hydrothermal carbon to the uranium-containing radioactive wastewater solution is 0.02g:50 mL.
The research on the biological characteristics and the physicochemical characteristics of the different genotype Lima longissima is carried out by the research on the biological characteristics and the physicochemical characteristics of the different genotype Lima longissima in the reference document named "Sun Chang method" of the different genotype Lima longissima in the invention [ D ]. the southwest university of science and technology, 2019 ".
The invention at least comprises the following beneficial effects: the hydrothermal carbon prepared from the pleione bulbocodioides has a large specific surface area and a good pore structure; a large number of functional groups are reserved; has better U (VI) reducing capability and better adsorption effect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is an SEM image of a hydrothermal charcoal of Lima longissima of different genotypes according to the present invention;
FIG. 2 is an FTIR chart of the hydrothermal charcoal of Lima longissima of different genotypes according to the present invention;
FIG. 3 is the XPS spectra of Limonitum before and after hydrothermal carbon adsorption of Limonitum of different genotypes (ZPX-220 and 214-220) of the present invention;
FIG. 4 shows XPS spectra of Limonitum indica of different genotypes (215-220, 30-A-220 and 52-B-220) before and after hydrothermal carbon adsorption;
FIG. 5 shows the adsorption amounts of uranium ions by hydrothermal charcoal of Ciphia Lianglica of different genotypes according to the present invention;
FIG. 6 shows the adsorption amounts of uranium ions by the hydrothermal charcoal of Ciphia Libra of different genotypes.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1:
a method for preparing hydrothermal charcoal from genotype ZPX Liangxiang bamboo is characterized by comprising the following steps:
taking stems at the diameter of chest of a genotype ZPX Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 32g of bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (ZPX-220), and detecting that the specific surface area of the hydrothermal carbon is 55.61m2/g。
Example 2:
a method for preparing hydrothermal charcoal from genotype 214 Lima gracilis is characterized by comprising the following steps:
taking stems at the diameter of breast height of a genotype 214 Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo for 96 hours at 50 ℃ by using an oven, splitting the bamboo into small pieces, crushing the small pieces by using a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 32g of the bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating the mixture to 220 ℃, and preserving the heat for 4 hours; naturally cooling to room temperature;
step two, centrifuging the feed liquid obtained in the step one by adopting a centrifuge at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (214-220), and detecting that the specific surface area of the hydrothermal carbon is 71.63m2/g。
Example 3:
a method for preparing hydrothermal charcoal from genotype 215 Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast height of 215 Lima corteum with genotype, removing bamboo rings, taking internodes, cleaning the surfaces with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 32g of bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature;
step two, centrifuging the feed liquid obtained in the step one by adopting a centrifuge at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (215-220), and detecting that the specific surface area of the hydrothermal carbon is 36.06m2/g。
Example 4:
a method for preparing hydrothermal charcoal from genotype 30-A Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast height of 30-A pleione rhizome, removing bamboo rings, taking internodes, cleaning the surfaces with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 32g of bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (30-A-220), and detecting that the specific surface area of the hydrothermal carbon is 54.41m2/g。
Example 5:
a method for preparing hydrothermal charcoal from genotype 52-B-A Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast height of a genotype 52-B-A Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying for 96 hours at 50 ℃ by an oven, splitting into small pieces, crushing by a crusher, sieving by a 200-mesh sieve, collecting to obtain bamboo powder, adding 32g of bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (52-B-220), and detecting that the specific surface area of the hydrothermal carbon is 90.79m2/g。
Example 6:
a method for preparing hydrothermal charcoal from genotype ZPX Liangxiang bamboo is characterized by comprising the following steps:
taking stems at the diameter of chest of a genotype ZPX Lima gambir, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo in an oven at 50 ℃ for 96 hours, splitting the bamboo into small pieces, crushing the small pieces with a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating the bamboo powder to 80 ℃, stirring the bamboo powder for 45min, filtering and drying the bamboo powder to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (1-ZPX-220), and detecting that the specific surface area of the hydrothermal carbon is 61.25m2/g。
Example 7:
a method for preparing hydrothermal charcoal from genotype 214 Lima gracilis is characterized by comprising the following steps:
taking stems at the diameter of breast of genotype 214 Lima gracilis, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo in an oven at 50 ℃ for 96 hours, splitting the bamboo into small pieces, crushing the small pieces with a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering and drying to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by adopting a centrifuge at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (1-214-220), and detecting that the specific surface area of the hydrothermal carbon is 78.15m2/g。
Example 8:
a method for preparing hydrothermal charcoal from genotype 215 Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast of genotype 215 Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo for 96 hours at 50 ℃ by using an oven, splitting the bamboo into small pieces, crushing the small pieces by using a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of the bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating the mixture to 80 ℃, stirring the mixture for 45 minutes, filtering and drying the mixture to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by adopting a centrifuge at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (1-215-220), and detecting that the specific surface area of the hydrothermal carbon is 45.55m2/g。
Example 9:
a method for preparing hydrothermal charcoal from genotype 30-A Lima longissima is characterized by comprising the following steps:
firstly, taking stems at the diameter of breast of 30-A genotypic Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering and drying to obtain pretreated bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (1-30-A-220), and detecting that the specific surface area of the hydrothermal carbon is 59.87m2/g。
Example 10:
a method for preparing hydrothermal charcoal from genotype 52-B-A Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast height of a genotype 52-B-A pleione rhizome, removing bamboo rings, taking internodes, cleaning the surface with distilled water, drying for 96 hours at 50 ℃ by using an oven, chopping into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering, and drying to obtain pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain the hydrothermal carbon (1-52-B-220), and detecting that the specific surface area of the hydrothermal carbon is 98.37m2/g。
Example 11:
a method for preparing hydrothermal charcoal from genotype ZPX Liangxiang bamboo is characterized by comprising the following steps:
taking stems at the diameter of chest of a genotype ZPX Lima gambir, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo in an oven at 50 ℃ for 96 hours, splitting the bamboo into small pieces, crushing the small pieces with a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating the bamboo powder to 80 ℃, stirring the bamboo powder for 45min, filtering and drying the bamboo powder to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain hydrothermal carbon, mixing 10g of hydrothermal carbon and 50g of absolute ethyl alcohol, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 240 ℃, preserving heat and maintaining pressure for 3min when the value of the pressure gauge reaches 6MPa, naturally cooling, and drying in vacuum to obtain reprocessed hydrothermal carbon (2-ZPX-220), wherein the specific surface area of the hydrothermal carbon is 65.11m through detection2/g。
Example 12:
a method for preparing hydrothermal charcoal from genotype 214 Lima gracilis is characterized by comprising the following steps:
taking stems at the diameter of breast of genotype 214 Lima gracilis, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo in an oven at 50 ℃ for 96 hours, splitting the bamboo into small pieces, crushing the small pieces with a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering and drying to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, the feed liquid obtained in the step one is processed by a centrifuge at 25 ℃,centrifuging at 5000rpm for 10min, pouring out the supernatant, adding anhydrous ethanol, oscillating, centrifuging again, repeating the above process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain hydrothermal carbon, mixing 10g of hydrothermal carbon with 50g of anhydrous ethanol, placing in a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 240 ℃, keeping the temperature and pressure for 3min when the value of the pressure gauge reaches 6MPa, naturally cooling, vacuum drying to obtain reprocessed hydrothermal carbon (2-214 one-step 220), and detecting that the specific surface area of the hydrothermal carbon is 82.25m2/g。
Example 13:
a method for preparing hydrothermal charcoal from genotype 215 Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast of genotype 215 Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying the bamboo for 96 hours at 50 ℃ by using an oven, splitting the bamboo into small pieces, crushing the small pieces by using a crusher, sieving the crushed bamboo pieces with a 200-mesh sieve, collecting the small pieces to obtain bamboo powder, adding 50g of the bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating the mixture to 80 ℃, stirring the mixture for 45 minutes, filtering and drying the mixture to obtain the pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, drying the solid at 50 ℃ to constant weight to obtain hydrothermal carbon, mixing 10g of hydrothermal carbon and 50g of absolute ethyl alcohol, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 240 ℃, and preserving heat and pressure for 3m when the value of the pressure gauge reaches 6MPain, natural cooling, vacuum drying to obtain the retreated hydrothermal carbon (2-215- & lt220- & gt), and detecting that the specific surface area of the hydrothermal carbon is 48.36m2/g。
Example 14:
a method for preparing hydrothermal charcoal from genotype 30-A Lima longissima is characterized by comprising the following steps:
firstly, taking stems at the diameter of breast of 30-A genotypic Lima longissima, removing bamboo rings, taking internodes, cleaning the surfaces of the internodes with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering and drying to obtain pretreated bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, then drying the solid at 50 ℃ to constant weight to obtain hydrothermal carbon, mixing 10g of hydrothermal carbon and 50g of absolute ethyl alcohol, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 240 ℃, preserving heat and maintaining pressure for 3min when the value of the pressure gauge reaches 6MPa, naturally cooling, and drying in vacuum to obtain reprocessed hydrothermal carbon (2-30-A-220), wherein the specific surface area of the hydrothermal carbon is 66.89m through detection2/g。
Example 15:
a method for preparing hydrothermal charcoal from genotype 52-B-A Lima longissima is characterized by comprising the following steps:
taking stems at the diameter of breast height of a genotype 52-B-A pleione rhizome, removing bamboo rings, taking internodes, cleaning the surface with distilled water, drying for 96 hours at 50 ℃ by using an oven, chopping into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, collecting to obtain bamboo powder, adding 50g of bamboo powder and 1000g of pretreatment solution into a microwave-ultrasonic mixed reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 45min, filtering, and drying to obtain pretreatment bamboo powder; then adding 32g of pretreated bamboo powder and 1600mL of water into a high-pressure reaction kettle, heating to 220 ℃, and preserving heat for 4 hours; naturally cooling to room temperature; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 50KHz, and the power is 500W; the microwave frequency is 2450MHz, and the power is 800W; the preparation method of the pretreatment solution comprises the following steps: adding 50g of potassium ferrate, 15g of zinc chloride and 10g of urea into 1000g of water, and stirring for 20min to obtain a pretreatment solution;
step two, centrifuging the feed liquid obtained in the step one by a centrifugal machine at 25 ℃, 5000rpm for 10min, pouring out the supernatant, adding absolute ethyl alcohol, oscillating and centrifuging again, repeating the process until the supernatant is colorless and transparent, then drying the solid at 50 ℃ to constant weight to obtain hydrothermal carbon, mixing 10g of hydrothermal carbon and 50g of absolute ethyl alcohol, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 240 ℃, preserving heat and maintaining pressure for 3min when the value of the pressure gauge reaches 6MPa, naturally cooling, and drying in vacuum to obtain reprocessed hydrothermal carbon (2-52-B-220), wherein the specific surface area of the hydrothermal carbon is 101.85m through detection2/g。
The surface appearance of the ciphia indica hydrothermal charcoal with different genotypes has obvious difference. As shown in FIG. 1, all genotypes produced hydrothermal charcoal at 220 ℃ under the same production conditions, but the hydrothermal charcoal produced was greatly different due to the difference in hemicellulose, cellulose, and lignin contents of the raw materials themselves. An obvious framework structure appears in the surface morphology of ZPX-220, and carbon microspheres are formed in a large quantity and grow along the framework structure, along with a serious agglomeration phenomenon. In terms of porosity, ZPX-220 has a large amount of pore structure, but the pores are not uniform. In 214-220, a large amount of carbon microspheres appear and are accompanied by serious agglomeration, compared with 214-220, the agglomeration is more serious, a large amount of carbon microspheres agglomerate on the surface of the hydrothermal carbon and block the formed pores, the pores tend to cover the whole surface, and the pore diameter on the image is smaller than that of ZPX-220. 214-220 the framework structure is hardly visible. In the surface topography of the cellulose/lignin with the highest value of 215-220, 215-220 is obviously different from the rest four genotypes, the carbon microspheres still exist on the surface, but the number is small, the serious agglomeration phenomenon still exists, and the surface is completely wrapped by the agglomerated carbon microspheres to form a thick carbon film. In terms of porosity, little pore structure is visible from the surface topography. The skeletal structure has completely disappeared. In 30-A-220, almost no carbon microsphere structure exists, and only a small amount of micro carbon microsphere structure exists on the surface, which does not mean the reduction of agglomeration phenomenon, but is caused by that a large amount of micro carbon microspheres grow along the skeleton completely and are agglomerated with each other to wrap the skeleton. In terms of the skeleton, the 30-A-220 can observe a fuzzy skeleton structure, but has a tendency of disappearing along with the reason of the agglomeration and the wrapping of the carbon microspheres. Still have a large amount of pore structures, also have the trend of gradually blocking because of the reason that the carbon microsphere agglomerates and wraps up the skeleton. In the lowest cellulose/lignin 52-B-220, the carbon microspheres are present in large amounts and the agglomeration phenomenon is significantly reduced, also growing along the framework. Clear filamentous skeleton structures can be observed in the image; in terms of porosity, 52-B-220 has more pore structure and relatively more uniform porosity.
As shown in fig. 2, all of the five different genotypes of the dianthus arborescens have the same characteristic peak. First, at 3400cm-1The absorption peak appearing in the vicinity is caused by-OH stretching vibration, and is attributed to the hydroxyl group, including hydroxyl groups in the hydroxyl compound and the phenolic substance. 2900cm-1The absorption peaks appearing nearby are caused by C-H vibration, mainly due to-CH3and-CH2-stretching vibrations. At 1699cm-1The characteristic peak is mainly caused by stretching vibration of carbonyl, and the bonding material is presumed to be a biological organic material and is mainly caused by stretching vibration of C ═ O in aromatic aldehyde or aromatic ketone. In that1600cm-1，1510cm-1The nearby absorption peak is mainly caused by stretching vibration of double bonds, and should be attributed to the stretching vibration peak of the benzene ring skeleton. 1427cm-1And 1456cm-1The nearby absorption peak is caused by the in-plane bending vibration peak of C-H and the stretching vibration of the double bond of the benzene ring skeleton. 1316cm-1The characteristic peak is caused by bending vibration in the O-H bond surface. 1160cm-1And 1205 cm-1The characteristic peak is mainly caused by C-O stretching vibration and is trapped in phenols and ethers, and aromatic ethers are presumed. 1110cm-1，1058cm-1，1032cm-1The characteristic peaks of the three wavelengths are mainly caused by C-O stretching vibration and belong to alcohol substances.
In order to further understand the adsorption and reduction capability of the different genotype Liangxiang bamboo hydrothermal carbons on U (VI), XPS is used for analyzing the hydrothermal carbon before and after U (VI) adsorption. The XPS full spectrum before and after five hydrothermal carbon adsorptions shows (FIG. 3-4), after all the materials adsorb, a new peak appears between 375-395eV, which corresponds to the U4f peak. Then, the two characteristic peaks are subjected to peak separation by utilizing the Gaussian function peak separation principle, and the two characteristic peaks are divided into U4f7/2And U4f5/2Two independent peaks, which are further divided into four peaks of 382eV, 384eV, 392eV and 393 eV. Of which 382eV (U4 f)7/2)， 392eV(U4f5/2) The characteristic peak at (A) corresponds to U (IV), while 384eV (U4 f)7/2)，393eV(U4f5/2) The characteristic peak corresponds to U (VI), which shows that the five hydrothermal carbons have adsorption effect on the U (VI) and have certain reduction capability, and can reduce the U (VI) into U (IV) with lower toxicity.
Accurately weighing 0.02g of five different genotype Liriosa corchorifolia hydrothermal carbons (prepared in examples 1-15), respectively placing into 100mL conical flasks, adding 50mL of uranyl nitrate solution (20 ppm uranyl nitrate solution: accurately weighing 0.0843829g of uranyl nitrate hexahydrate, dissolving with ultrapure water, then fixing the volume to 2L with ultrapure water, adjusting pH to 5, transferring to 2L conical flasks for later use), placing into a shaker at 25 ℃, 150rpm, adsorbing for 24h, then obtaining filtrate through a filter membrane with the pore diameter of 0.45 micrometer, taking 2mL of filtrate, adding 800 μ L of arsine tris (preparing 1g/L arsine III solution: dissolving 1g of arsine III in ultrapure water, then fixing the volume to 1L with ultrapure water, transferring to a 1L thin-mouth flask for later use), adding 200 μ L of AR hydrochloric acid solution (preparing 0.1mol/L hydrochloric acid solution; 3.063865mL of hydrochloric acid (prepared) is fixed to 1L with ultrapure water), after the volume was increased to 10mL with ultrapure water, 200. mu.L of the prepared liquid was spotted onto a 96-well plate, and the absorbance at a wavelength of 650nm was measured by a multifunctional microplate reader. Thereby analyzing the adsorption effect of the samples prepared by each process; the results are shown in FIG. 6; as shown in FIG. 6, the adsorption amounts of different genotype Liangtuo pleionis hydrothermal carbons to U (VI) are significantly different, the highest adsorption amount of 52-B-220 reaches 13.6 mg/g; the second time is 30-A-220 and ZPX-220, which are respectively 10.9mg/g and 11.04 mg/g; followed by 214-220, the adsorption capacity is 9.96 mg/g; finally 215-220 with the lowest adsorption capacity, which is 7.15 mg/g. The results of the adsorption comparison show that the overall adsorption decreased as the cellulose/lignin increased. 52-B-220 has the highest adsorption capacity because the lower cellulose/lignin reduces the agglomeration of carbon microspheres, and the carbon microspheres block the formed pores, so that 52-B-220 has a larger specific surface area. This relatively good pore structure provides an innate advantage for the adsorption of U (vi). The reason why the 215-220 adsorption amount is extremely low is that the high cellulose/lignin causes serious agglomeration of carbon microspheres, so that the whole material surface is wrapped, most of pore structures are seriously blocked, the specific surface area is low, and the adsorption capacity to U (VI) is weakened. And the adsorption amount of the obtained hydrothermal carbon to U (VI) can be remarkably improved by pretreating the bamboo powder and retreating the obtained hydrothermal carbon (figures 5 and 6).
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor with which the invention may be practiced, and further modifications may readily be effected therein by those skilled in the art, without departing from the general concept as defined by the claims and their equivalents, which are not limited to the details given herein and the examples shown and described herein.

Claims (9)

1. A method for preparing hydrothermal charcoal based on different genotypes of Lima longissima is characterized by comprising the following steps:
step one, preparing the ciphigenia indica with different genotypes into bamboo powder, then adding the bamboo powder and water into a high-pressure reaction kettle, heating to 180-300 ℃, and preserving heat for 3-5 hours; naturally cooling to room temperature;
and step two, centrifuging the feed liquid obtained in the step one by adopting a centrifugal machine, pouring out the supernatant, adding absolute ethyl alcohol, oscillating, centrifuging again, repeating the process until the supernatant is colorless and transparent, and drying the solid to constant weight to obtain the hydrothermal carbon.
2. The method for preparing hydrothermal charcoal based on different genotypes of Lima spicata according to claim 1, wherein the different genotypes of Lima spicata are named ZPX, 214, 215, 30-A and 52-B, respectively; wherein the cellulose content, lignin content and cellulose/lignin of the Lima spicata of different genotypes are shown in Table 1;
TABLE 1 physicochemical Properties of different genotypes of Lima longissima
Genotype(s) Cellulose content (%) Lignin content (%) Cellulose/lignin ZPX 42.0695±0.0668e 15.9540±0.5629b 2.6434±0.0919cd 214 51.4595±0.4250b 17.8185±0.0071a 2.8880±0.0250bc 215 53.5340±0.0372a 17.3873±0.2097ab 3.0798±0.0358ab 30-A 43.7862±0.2211d 16.3482±0.1135ab 2.6785±0.0143cd 52-B 42.4151±0.1857e 16.4286±0.0483ab 2.5818±0.0037d
The process for preparing the bamboo powder from the Liriosa corchorifolia of different genotypes comprises the following steps: taking stems at the diameter of breast of the pleione bulbocodioides and removing bamboo rings, taking internodes, cleaning the surface with distilled water, drying for 96 hours at 50 ℃ by using an oven, splitting into small pieces, crushing by using a crusher, sieving by using a 200-mesh sieve, and collecting to obtain bamboo powder.
3. The method for preparing the hydrothermal charcoal based on the different genotypes of the Lily corteus as claimed in claim 1, wherein in the second step, the centrifugation time is 10-15 min, the centrifugation temperature is 25 ℃, and the centrifugation rotation speed is 5000 rpm.
4. The method for preparing the hydrothermal charcoal based on the different genotypes of the Lima longissima as claimed in claim 1, wherein in the first step, the bamboo powder is pretreated, and the pretreatment process comprises the following steps: adding the bamboo powder and the pretreatment solution into a microwave-ultrasonic wave mixing reaction device, starting microwaves and ultrasonic waves, heating to 80 ℃, stirring for 30-45 min, filtering, and drying to obtain pretreated bamboo powder; the ultrasonic frequency of the microwave-ultrasonic mixed reaction device is 35-50 KHz, and the power is 500-650W; the microwave frequency is 915MHz or 2450MHz, and the power is 400-800W.
5. The method for preparing the hydrothermal carbon based on the different genotypes of the Lima longissima as claimed in claim 4, wherein the preparation method of the pretreatment solution comprises the following steps: adding 5-8 parts by weight of potassium ferrate, 1-3 parts by weight of zinc chloride and 1-2 parts by weight of urea into 80-100 parts by weight of water, and stirring for 10-20 min to obtain a pretreatment solution.
6. The method for preparing the hydrothermal carbon based on the different genotypes of the pleione bulbocodioides as claimed in claim 4, wherein the mass ratio of the bamboo powder to the pretreatment solution is 1: 15-30.
7. The method for preparing the hydrothermal charcoal based on the different genotypes of the Lima longissima as claimed in claim 1, wherein in the second step, the obtained hydrothermal charcoal is reprocessed, and the reprocessing process comprises: mixing 1-5 parts of hydrothermal carbon and 40-60 parts of absolute ethyl alcohol according to parts by weight, placing the mixture into a reaction kettle with a pressure gauge, sealing, heating the sealed reaction kettle to 235-245 ℃, keeping the temperature and pressure for 3-5 min when the pressure gauge reaches 5-7 MPa, naturally cooling, and carrying out vacuum drying to obtain the reprocessed hydrothermal carbon.
8. Application of the hydrothermal carbon as claimed in any one of claims 1 to 7 in adsorption of uranium in radioactive wastewater, wherein the hydrothermal carbon is added into a uranium-containing radioactive wastewater solution, and then the uranium-containing radioactive wastewater solution is placed in a shaking table at 25 ℃ and 150-200 rpm for adsorption for 18-26 h.
9. The use of hydrothermal charcoal for the adsorption of uranium from radioactive waste water according to claim 8, wherein the mass to volume ratio of the hydrothermal charcoal to the radioactive waste water solution containing uranium is 0.02g:50 mL.
CN202111080118.6A 2021-09-15 2021-09-15 Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application Pending CN113877479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111080118.6A CN113877479A (en) 2021-09-15 2021-09-15 Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111080118.6A CN113877479A (en) 2021-09-15 2021-09-15 Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application

Publications (1)

Publication Number Publication Date
CN113877479A true CN113877479A (en) 2022-01-04

Family

ID=79009403

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111080118.6A Pending CN113877479A (en) 2021-09-15 2021-09-15 Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application

Country Status (1)

Country Link
CN (1) CN113877479A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013027809A (en) * 2011-07-27 2013-02-07 Vision Development Co Ltd Treatment method and adsorbent for metal atom-containing waste liquor
CN103466599A (en) * 2013-09-18 2013-12-25 福州大学 Hydrothermal preparation method of bamboo fiber nanocarbon particles
CN104492382A (en) * 2013-12-06 2015-04-08 东华理工大学 Preparation method of carboxylation hydrothermal biomass charcoal for remedying uranium-containing wastewater
CN104587973A (en) * 2015-01-04 2015-05-06 哈尔滨工程大学 Uranium extracting adsorption material taking cotton cloth as carrier and preparation method thereof
CN105817203A (en) * 2016-05-27 2016-08-03 国际竹藤中心 Bamboo charcoal-based magnetic composite material and preparation method
CN108975327A (en) * 2018-09-12 2018-12-11 南阳师范学院 A method of preparing active carbon
US20190127227A1 (en) * 2016-07-22 2019-05-02 China Petroleum And Chemical Corporation Carbon-based porous material and preparation method and use thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013027809A (en) * 2011-07-27 2013-02-07 Vision Development Co Ltd Treatment method and adsorbent for metal atom-containing waste liquor
CN103466599A (en) * 2013-09-18 2013-12-25 福州大学 Hydrothermal preparation method of bamboo fiber nanocarbon particles
CN104492382A (en) * 2013-12-06 2015-04-08 东华理工大学 Preparation method of carboxylation hydrothermal biomass charcoal for remedying uranium-containing wastewater
CN104587973A (en) * 2015-01-04 2015-05-06 哈尔滨工程大学 Uranium extracting adsorption material taking cotton cloth as carrier and preparation method thereof
CN105817203A (en) * 2016-05-27 2016-08-03 国际竹藤中心 Bamboo charcoal-based magnetic composite material and preparation method
US20190127227A1 (en) * 2016-07-22 2019-05-02 China Petroleum And Chemical Corporation Carbon-based porous material and preparation method and use thereof
CN108975327A (en) * 2018-09-12 2018-12-11 南阳师范学院 A method of preparing active carbon

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ZHAO,X；LI,M: "Phosphate modified hydrochars produced via phytic acid-assisted hydrothermal carbonization for efficient removal of U(VI), Pb(II) and Cd(II)", vol. 298, pages 113487 *
中国科学技术协会: "《2016-2017矿物材料学科发展报告》", vol. 1, 科学技术文献出版社, pages: 245 *
戚鑫: "生物炭固定化微生物对U、Cd污染土壤的原位钝化修复", vol. 37, no. 8, pages 1683 - 1689 *
杜家豪: "改性竹基生物炭对铀的吸附特性及其机理分析", vol. 41, no. 5, pages 119 - 124 *

Similar Documents

Publication Publication Date Title
Blanes et al. Application of soy hull biomass in removal of Cr (VI) from contaminated waters. Kinetic, thermodynamic and continuous sorption studies
CN106564983B (en) A method of heavy metal is adsorbed using seashells
CN102336841A (en) Method for extracting tea polysaccharide
WO1997021734A1 (en) Methods and apparatus for the extraction of phytochemicals from fibrous plants
CN101966990A (en) Method for preparing activated carbon from kernel of common macrocarpium fruit
CN1555728A (en) Method of combined preparing garlic essential oil and garlic polysaccharide
CN106943999A (en) A kind of graphene modified attapulgite earth adsorbing and preparation method
CN108166293B (en) A kind of method and its system of irradiation-plant fibrous agricultural wastes of chemical method Combined Treatment
CN113877479A (en) Method for preparing hydrothermal carbon based on different genotype dianthus tuberosus and adsorption application
CN111841505A (en) Preparation method of collagen fiber aerogel material for efficiently capturing iodine vapor
Zhang et al. Effects of ultrasonic and ozone pretreatment on the structural and functional properties of soluble dietary fiber from lemon peel
CN107670647A (en) A kind of method that adsorbent for heavy metal is prepared using oil-tea camellia husks
CN110479223A (en) A kind of method of the microwave-heating poplar bits preparation simultaneously rich in phenol bio-oil and the biomass carbon for adsorbing heavy metal ion
CN108383926B (en) Method for co-producing gel type and emulsion type pectin by using chicory/taro meal
Gondhalekar et al. Equilibrium and kinetics study of uranium (VI) from aqueous solution by Citrus limetta peels
Li et al. Optimization of ultrasonic-assisted extraction technology of Sargassum fusiforme polysaccharides and evaluation of their antioxidant activity
Yinghua et al. Removal of sunset yellow by methanol modified walnut shell
CN107760441A (en) A kind of quick method for removing aflatoxin in edible oil
CN108821282B (en) Method for preparing active carbon with high nitrogen-containing functional groups by using shrimp bran modified Cyperaceae plant-based active carbon
CN105727896A (en) Method for preparing fish bone heavy metal absorbent
CN109289775A (en) A kind of Magnetic Activated charcoal adsorbent material and preparation method
CN105536713B (en) The extraction of jute polysaccharide and its application in hexavalent chromium is removed
CN105461816B (en) A kind of acorn starch and preparation method thereof
CN112661975A (en) Method for extracting xylose, lignin and cellulose nanocrystals by using bamboo crushed materials
CN103877938A (en) Preparation method of modified biogas residue ammonium-nitrogen adsorption agent

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination