CN111410237B - Method for recycling waste polluted biomass - Google Patents
Method for recycling waste polluted biomass Download PDFInfo
- Publication number
- CN111410237B CN111410237B CN202010386262.1A CN202010386262A CN111410237B CN 111410237 B CN111410237 B CN 111410237B CN 202010386262 A CN202010386262 A CN 202010386262A CN 111410237 B CN111410237 B CN 111410237B
- Authority
- CN
- China
- Prior art keywords
- biomass
- cadmium
- kenaf
- bifeo
- solution
- 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.)
- Active
Links
- 239000002028 Biomass Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002699 waste material Substances 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 29
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 25
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 240000000797 Hibiscus cannabinus Species 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 7
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims abstract description 7
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims abstract description 7
- 235000009120 camo Nutrition 0.000 claims abstract description 7
- 235000005607 chanvre indien Nutrition 0.000 claims abstract description 7
- 239000011487 hemp Substances 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 20
- 239000002689 soil Substances 0.000 claims description 17
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000009331 sowing Methods 0.000 claims description 6
- 238000000197 pyrolysis Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000012258 culturing Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 238000004382 potting Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 2
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 230000001699 photocatalysis Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 229910001430 chromium ion Inorganic materials 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/843—Arsenic, antimony or bismuth
- B01J23/8437—Bismuth
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/33—Electric or magnetic properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for recycling waste polluted biomass, which comprises the following steps: collecting the cadmium-rich red hemp biomass, taking stems of the peeled cadmium-rich red hemp biomass, cleaning, drying and crushing to obtain a powder product; step two, soaking the powder product in NaOH solution, heating and stirring in 70-90 ℃ water bath for 5-30min, and then adding Bi (NO) with the concentration of 0.15-0.2mol/L 3 ) 3 Solution Fe (NO) 3 ) 3 The solution is mixed to obtain a mixed solutionDrying the liquid to obtain BiFeO 3 Kenaf biomass coupling material; step three, biFeO is taken 3 Introducing nitrogen into vacuum tube furnace, pyrolyzing at 300-500 deg.C for 1-5 hr, and sieving the pyrolyzed product with 50-200 mesh sieve to obtain BiFeO 3 Biochar magnetic composite material. The invention discloses a safe, economical and efficient method for recycling waste biomass, which aims at recycling waste kenaf biomass after phytoremediation at present and pollution of hexavalent chromium.
Description
Technical Field
The invention belongs to the field of functional materials, relates to the recycling application of kenaf waste biomass after soil heavy metal cadmium pollution remediation in the field of wastewater treatment, and in particular relates to the application of a magnetic biochar composite material in the treatment of heavy metal wastewater.
Background
Heavy metal pollution is a serious pollution problem nowadays. In recent years, waste biomass produced by phytoremediation technology each year, and conventional incineration, landfill and other technologies, may cause heavy metals to reenter the environment, resulting in secondary pollution. Therefore, the development of a resource utilization way of waste biomass has important practical significance.
Biochar is a very promising adsorbent for absorbing various chemical contaminants, and biochar can be as effective as activated carbon in some cases, but at a much lower cost. First, the high Organic Carbon (OC) content and large Surface Area (SA) of biochar provide rich adsorption sites for pesticides through hydrophobic partitioning and pore filling. In addition, their aromaticity, surface functionality and negative surface charge may enhance the adsorption of pesticides through specific interactions.
Currently, tiO 2 The catalyst has the characteristics of strong oxidizing capability, high catalytic activity, stable property, low price, no toxicity and the like, and is widely applied to the aspects of wastewater treatment, air purification, sterilization, self-cleaning and the like. However, due to TiO 2 The forbidden bandwidth of (2) is 3.2eV, and the utilization efficiency of visible light is low. Bismuth ferrite (BiFeO) 3 ) The semiconductor is a novel narrow bandgap semiconductor, and when irradiated by visible light with the wavelength less than or equal to 610nm, valence band electrons are excited to generate photo-generated holes and photo-generated electrons with high activity, so that the semiconductor has stronger reactivity, is magnetic, is easy to recycle and repeatedly use for multiple times, and has wide application prospect in the aspect of visible light catalysis. The biochar is a good adsorbent as a product of biomass pyrolysis and is widely applied to wastewater treatment. Therefore, the composite material of the biochar and the bismuth ferrite is prepared by utilizing the waste biomass subjected to phytoremediation, and a new idea can be provided for the resource utilization of the waste biomass.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for recycling waste polluted biomass. The invention discloses a safe, economical and efficient method for recycling waste biomass, which aims at recycling waste cadmium-rich kenaf biomass after phytoremediation and hexavalent chromium pollution at present.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for recycling waste polluted biomass comprises the following steps:
collecting the cadmium-rich red hemp biomass, taking stems of the peeled cadmium-rich red hemp biomass, cleaning, drying and crushing to obtain a powder product;
step two, soaking the powder product in 0.05-0.2mol/L NaOH solution, heating in 70-90 ℃ water bath, stirring for 5-30min, and then adding Bi (NO) with the concentration of 0.15-0.2mol/L 3 ) 3 Solution and Fe (NO) with concentration of 0.15-0.2mol/L 3 ) 3 Heating the solution in water bath at 80-90deg.C, stirring for 1-60 min, adjusting pH to 7.0-7.5 to obtain mixed solution, and oven drying to obtain BiFeO 3 Kenaf biomass coupling material; wherein the mass volume ratio of the powder product to the NaOH solution is 10-50:500-1000g/ml; naOH solution, bi (NO) 3 ) 3 Solution and Fe (NO) 3 ) 3 The volume ratio of the solution is 500-1000:100-250:100-250;
step three, biFeO is taken 3 Introducing nitrogen into a vacuum tube furnace at a flow rate of 50-200mL/min, raising the temperature to 300-500 ℃ at a speed of 5-10 ℃/min, maintaining the temperature for pyrolysis for 1-5h, continuously maintaining the nitrogen circulation, cooling to room temperature to obtain a pyrolyzed product, and sieving the pyrolyzed product with a 50-200-mesh sieve to obtain BiFeO 3 Biochar magnetic composite material.
Further improved, the method for obtaining the cadmium-rich red hemp biomass comprises the following steps: and (3) carrying out a soil cadmium pollution repair potting experiment in an illumination culture room with the temperature of 15-30 ℃, sub-packaging the passivated cadmium-rich soil into a solid flowerpot, wherein the cadmium concentration in the soil is 10-100mg/L, sowing the kenaf through seeds, watering the surface soil after the first sowing, turning on a light source after seedling emergence, controlling the light intensity to be 2000-6000LX, watering the soil until the water content is 10-15%, culturing for 3-4 months, and collecting the biomass of the kenaf rich in cadmium.
In a further improvement, in the first step, the stems of the kenaf biomass after being peeled are washed, dried and then crushed into powder products by a sieve with the diameter of 0.1-3.0 mm.
In a further improvement, in the second step, the stirring speed is 200-350rpm.
In the second step, the mixed solution is dried at 70-110 ℃ to obtain BiFeO 3 Kenaf biomass coupling material.
Compared with the prior art, the invention has the advantages that:
1. BiFeO used in the method of the invention 3 Biochar magnetic composite materialThe method has the advantages of low cost of raw materials and good economy, the main raw materials are kenaf biomass after phytoremediation of soil heavy metal cadmium pollution, and sodium hydroxide, bismuth nitrate and ferric nitrate are common chemical materials.
2. In the preparation process of the material, cadmium in the cadmium-rich kenaf biomass is converted into CdS and CdO forms with photocatalysis performance by controlling reaction conditions.
2. BiFeO is prepared 3 The biochar magnetic composite material is directly added into a reactor for adsorption reaction, and the whole process is simple and easy to operate, and the coupling material is convenient to separate and reuse because the biochar modified by bismuth ferrite has magnetism.
3. The method can effectively treat the waste water containing hexavalent chromium, and provides a new way for treating heavy metal waste water.
Drawings
FIG. 1 shows BiFeO according to example 1 of the present invention 3 The removal change curve graph of the biological carbon magnetic composite material on hexavalent chromium with different initial concentrations;
FIG. 2 is BiFeO of example 2 of the present invention 3 And the adsorption change curve graph of the biochar magnetic composite material on hexavalent chromium in wastewater under different pH values.
Detailed Description
The present invention will be described in further detail with reference to the following examples
Example 1:
the invention discloses a method for utilizing BiFeO 3 The method for removing hexavalent chromium in water by using the biochar magnetic composite material comprises the following steps:
1.BiFeO 3 preparation of biochar magnetic composite material
Performing soil cadmium pollution repair potting experiments in an illumination culture room at 25 ℃, subpackaging passivated cadmium-rich soil into solid bottom flowerpots, wherein the cadmium concentration in the soil is 20mg/L, sowing kenaf by seeds, watering surface soil after the first sowing, turning on a light source after seedling emergence, controlling the light intensity to 4000LX, watering the soil until the water content is lower than 12%, culturing for 3 months,collecting the biomass of the kenaf rich in cadmium, taking the stems after peeling, cleaning, drying in an oven at 85 ℃, crushing by a crusher, sieving with a 1.5mm sieve, taking 20g of sieved kenaf biomass powder, soaking in 500ml of NaOH solution with the concentration of 0.1mol/L, heating in a water bath at 90 ℃ and stirring for 5 minutes. 0.15mol/L Bi (NO) 3 ) 3 And Fe (NO) 3 ) 3 250ml of each was taken and mixed in a three-necked flask, and the previous mixed solution of NaOH and kenaf powder was added. Heated in a water bath at 90℃and stirred at 350rpm for 30 minutes. After completion, the mixture was poured out of the three-necked flask, and the pH was adjusted to 7.5. Drying the mixed solution in an oven at 85 ℃ to obtain BiFeO 3 Kenaf biomass coupling material.
The BiFeO prepared 3 And (3) placing the kenaf biomass coupling material in a vacuum tube furnace, introducing nitrogen at a flow rate of 100ml/min, raising the temperature to 350 ℃ at a speed of 5 ℃/min, keeping the temperature after the temperature is raised to a specified temperature, and cooling the product obtained after pyrolysis for 3 hours to room temperature under the condition of continuously keeping the nitrogen circulation. The pyrolyzed product is sieved by a 200-mesh sieve to obtain BiFeO 3 Biochar magnetic composite material.
2. Treatment of hexavalent chromium wastewater
Hexavalent chromium wastewater with the concentration of 5, 10, 20 and 40mg/L is prepared, and the pH value is regulated to 2 by nitric acid or sodium hydroxide. BiFeO prepared by the method 3 The biochar magnetic composite material is added into hexavalent chromium wastewater. BiFeO added per liter of wastewater 3 The biochar magnetic composite material is 1.0g. The above reaction system was placed under a xenon lamp with photocurrent set at 15a,150rpm/min magnetically stirring the wastewater. Photocatalytic 5 hours BiFeO was prepared by magnet 3 And separating the biochar magnetic composite material from the solution to finish the treatment of hexavalent chromium wastewater. The concentration of hexavalent chromium ions remaining in the solution is determined using ultraviolet spectrophotometry. The results of the calculated hexavalent chromium removal rate are shown in fig. 1. As can be seen from FIG. 1, biFeO 3 The removal rate of hexavalent chromium by the biochar magnetic composite material is reduced along with the increase of the initial concentration, and the main reason is probably BiFeO 3 The adsorption sites of the biochar magnetic composite material and the generated photocatalytic active substances are limited.
The invention relates to the utilization of BiFeO 3 The method for removing hexavalent chromium in the wastewater by using the biochar magnetic composite material comprises the following steps:
1.BiFeO 3 preparation of biochar magnetic composite material
This step is the same as step 1 of example 1.
2. Hexavalent chromium wastewater treatment
The composite material prepared by the method is respectively added into 200mL hexavalent chromium wastewater with the pH value of 2 by 0.01g, 0.02g, 0.03g, 0.04g and 005g, and the initial concentration of hexavalent chromium ions is 10mg/L. Placing the reaction system under a photocatalysis xenon lamp, stirring and starting the xenon lamp, setting the current of a light source of the xenon lamp to be 15A, and carrying out photocatalysis for 5 hours, and then utilizing a magnet to carry out BiFeO 3 And separating the biochar magnetic composite material from the solution to finish the removal of hexavalent chromium wastewater. The concentration of hexavalent chromium ions remaining in the solution was measured using ultraviolet spectrophotometry, and the experimental results are shown in fig. 2. Experimental data shows that when BiFeO 3 The larger the adding amount of the biochar magnetic composite material is, the stronger the removing capability of hexavalent chromium in the solution is.
The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above examples, but various process schemes without substantial differences from the concept of the present invention are all within the scope of the present invention.
Claims (5)
1. The method for recycling the waste polluted biomass is characterized by comprising the following steps of:
collecting the cadmium-rich red hemp biomass, taking stems of the peeled cadmium-rich red hemp biomass, cleaning, drying and crushing to obtain a powder product;
step two, soaking the powder product in 0.05-0.2mol/L NaOH solution, heating in 70-90 ℃ water bath, stirring for 5-30min, and then adding Bi (NO) with the concentration of 0.15-0.2mol/L 3 ) 3 Solution and Fe (NO) with concentration of 0.15-0.2mol/L 3 ) 3 Heating the solution in water bath at 80-90deg.C, stirring for 1-60 min, adjusting pH to 7.0-7.5 to obtain mixed solution, and oven dryingDrying to obtain BiFeO 3 Kenaf biomass coupling material; wherein the mass volume ratio of the powder product to the NaOH solution is 10-50:500-1000g/ml; naOH solution, bi (NO) 3 ) 3 Solution and Fe (NO) 3 ) 3 The volume ratio of the solution is 500-1000:100-250:100-250;
step three, biFeO is taken 3 Introducing nitrogen into a vacuum tube furnace at a flow rate of 50-200mL/min, raising the temperature to 350 ℃ at a speed of 5-10 ℃/min, maintaining the temperature for pyrolysis for 3h, continuously maintaining the nitrogen flow, cooling to room temperature to obtain a pyrolyzed product, and sieving the pyrolyzed product with a 50-200-mesh sieve to obtain BiFeO 3 Biochar magnetic composite material.
2. The method for recycling waste contaminated biomass according to claim 1, wherein the method for obtaining the cadmium-enriched kenaf biomass comprises the following steps: and (3) carrying out a soil cadmium pollution repair potting experiment in an illumination culture room with the temperature of 15-30 ℃, sub-packaging the passivated cadmium-rich soil into a solid flowerpot, wherein the cadmium concentration in the soil is 10-100mg/L, sowing the kenaf through seeds, watering the surface soil after the first sowing, turning on a light source after seedling emergence, controlling the light intensity to be 2000-6000LX, watering the soil until the water content is 10-15%, culturing for 3-4 months, and collecting the biomass of the kenaf rich in cadmium.
3. The method for recycling waste and contaminated biomass according to claim 1, wherein in the first step, the stems of the kenaf biomass after being peeled are washed, dried, and then crushed through a sieve having a diameter of 0.1-3.0mm to obtain a powdery product.
4. The method for recycling waste and contaminated biomass according to claim 1, wherein in the second step, the stirring speed is 200-350rpm.
5. The method for recycling waste and polluted biomass according to claim 1, wherein in the second step, the mixed solution is dried at 70-110 ℃ to obtain the BiFeO 3/kenaf biomass coupling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386262.1A CN111410237B (en) | 2020-05-09 | 2020-05-09 | Method for recycling waste polluted biomass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386262.1A CN111410237B (en) | 2020-05-09 | 2020-05-09 | Method for recycling waste polluted biomass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111410237A CN111410237A (en) | 2020-07-14 |
| CN111410237B true CN111410237B (en) | 2023-07-14 |
Family
ID=71488702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010386262.1A Active CN111410237B (en) | 2020-05-09 | 2020-05-09 | Method for recycling waste polluted biomass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111410237B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662728B (en) * | 2020-07-29 | 2021-12-21 | 杨凌职业技术学院 | Walnut branch biochar-based fertilizer soil remediation agent and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016176906A1 (en) * | 2015-05-07 | 2016-11-10 | 浙江大学 | Method for producing canna indica biochar capable of adsorbing ammonia nitrogen and cadmium simultaneously |
| MX2015015216A (en) * | 2015-10-30 | 2017-05-01 | Univ Autonoma De Nuevo Leon | Low temperature combustion method assisted by a surfactant, for obtaining bismuth ferrite with nanometric particles size and with ferromagnetic properties. |
| JP2018080090A (en) * | 2016-11-17 | 2018-05-24 | 日本化学工業株式会社 | Manufacturing method of bismuth iron oxide |
| WO2018092796A1 (en) * | 2016-11-17 | 2018-05-24 | 日本化学工業株式会社 | Method for producing bismuth iron oxide |
| CN108311117A (en) * | 2018-02-05 | 2018-07-24 | 中南林业科技大学 | A kind of magnetic bio Carbon Materials and preparation method thereof for heavy metal containing wastewater treatment |
| CN110773126A (en) * | 2019-11-12 | 2020-02-11 | 中南大学 | Biochar pellets and preparation method and application thereof |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5885931B2 (en) * | 2010-03-15 | 2016-03-16 | キヤノン株式会社 | Bismuth iron oxide powder, method for producing the same, dielectric ceramics, piezoelectric element, liquid discharge head, and ultrasonic motor |
| CN102285690B (en) * | 2011-04-12 | 2013-07-03 | 青岛大学 | Chemical coprecipitation method for synthesizing Bi2Fe4O9 submicron rods |
| CN103318887A (en) * | 2013-06-28 | 2013-09-25 | 广西大学 | Method for preparing activated carbon from ambary straws |
| CN104607450A (en) * | 2014-12-31 | 2015-05-13 | 广东省生态环境与土壤研究所 | Phytoremediation method for restoring farmland soil heavy metal cadmium pollution |
| CN105665439A (en) * | 2016-01-15 | 2016-06-15 | 江苏省地质调查研究院 | Practical method for farmland soil cadmium pollution remediationby planting Salix jiangsuensis J795 |
| CN105772051B (en) * | 2016-04-18 | 2018-08-21 | 河南师范大学 | A kind of Bi2O2CO3-BiFeO3Composite photo-catalyst and preparation method thereof |
| CN108781682A (en) * | 2018-05-25 | 2018-11-13 | 成都纳诺环保科技有限责任公司 | A kind of planting new method of enriched in metals cadmium |
| CN108906867A (en) * | 2018-06-29 | 2018-11-30 | 桂林理工大学 | A method of improving Cadmium in Soil bio-available Zn concentration |
| CN108786827B (en) * | 2018-07-12 | 2021-04-13 | 辽宁大学 | Composite double-Z type photocatalyst BiFeO3/CuBi2O4/BaTiO3And preparation method and application thereof |
| CN108793262A (en) * | 2018-09-25 | 2018-11-13 | 太仓弘潞新材料有限公司 | It is a kind of to prepare pure phase BiFeO3The method of powder |
| CN109437317B (en) * | 2018-12-20 | 2021-09-07 | 陕西科技大学 | Flower-shaped BiFeO prepared by hydrothermal method3Powder and preparation method thereof |
| CN109794262B (en) * | 2019-01-31 | 2021-11-30 | 福建农林大学 | Method for preparing photocatalytic material by utilizing cadmium hyper-enrichment plant and application |
| CN110252397A (en) * | 2019-05-09 | 2019-09-20 | 中南林业科技大学 | A kind of biology based composite material of carbon and its preparation method and application |
| CN110038884A (en) * | 2019-06-05 | 2019-07-23 | 湖南鹏田农业科技有限公司 | It is a kind of to improve bluish dogbane to the processing method of heavy metal cadmium remediation efficiency in acid soil |
| CN110227475B (en) * | 2019-06-25 | 2022-12-02 | 长春工程学院 | BiFeO 3 /Bi 2 Fe 4 O 9 Preparation method and application of heterostructure catalyst |
| CN110508612B (en) * | 2019-09-02 | 2021-03-26 | 江苏省地质调查研究院 | Method for removing residual cadmium in farmland |
-
2020
- 2020-05-09 CN CN202010386262.1A patent/CN111410237B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016176906A1 (en) * | 2015-05-07 | 2016-11-10 | 浙江大学 | Method for producing canna indica biochar capable of adsorbing ammonia nitrogen and cadmium simultaneously |
| MX2015015216A (en) * | 2015-10-30 | 2017-05-01 | Univ Autonoma De Nuevo Leon | Low temperature combustion method assisted by a surfactant, for obtaining bismuth ferrite with nanometric particles size and with ferromagnetic properties. |
| JP2018080090A (en) * | 2016-11-17 | 2018-05-24 | 日本化学工業株式会社 | Manufacturing method of bismuth iron oxide |
| WO2018092796A1 (en) * | 2016-11-17 | 2018-05-24 | 日本化学工業株式会社 | Method for producing bismuth iron oxide |
| CN108311117A (en) * | 2018-02-05 | 2018-07-24 | 中南林业科技大学 | A kind of magnetic bio Carbon Materials and preparation method thereof for heavy metal containing wastewater treatment |
| CN110773126A (en) * | 2019-11-12 | 2020-02-11 | 中南大学 | Biochar pellets and preparation method and application thereof |
Non-Patent Citations (4)
| Title |
|---|
| Design and preparation of chitosan-crosslinke bismuth ferrite/biochar coupled magnetic material for methylene blue removal;Xiaoxi Cai等;International of Environmental Research and Public Health;第17卷(第1期);第6-24页 * |
| FeCl3改性柚子皮对水中Cr6+的吸附;王琼等;环境工程学报;第10卷(第12期);第6928-6934页 * |
| 生物炭/铁复合材料的制备及其在环境修复中的应用研究进展;段浩楠;吕宏虹;王夫美;沈伯雄;;环境化学(第03期);第212-228页 * |
| 纳米铁酸铋及其改性物的环境催化性能;安俊健;王梦玲;黄梦璇;王鹏;张光彦;;化学进展(第09期);第52-61页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111410237A (en) | 2020-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108311153B (en) | Nano-ZnO loaded magnetic biochar composite photocatalyst and preparation method thereof | |
| CN102580742B (en) | Activated carbon-loaded cuprous oxide photocatalyst and preparation method thereof | |
| CN109364940B (en) | Biochar loaded ferro-manganese bimetallic oxide photo-Fenton composite material and preparation method thereof | |
| CN109225132B (en) | Biochar-based silicon-loaded adsorbent and preparation method and application thereof | |
| CN108503015A (en) | Method for preparing photo-Fenton catalyst through sludge pyrolysis, catalyst and application | |
| CN113198516A (en) | Iron-nitrogen co-doped biochar catalyst, and preparation method and application thereof | |
| CN108993475B (en) | Ternary composite material heterogeneous light Fenton catalyst and preparation and application thereof | |
| CN112194236A (en) | Method for treating salt-containing degradation-resistant wastewater by activating peroxymonosulfate through biochar-copper oxide composite material | |
| CN110756163A (en) | Nano CoFe2O4Carbon fiber felt composite material and preparation method and application thereof | |
| US20230002253A1 (en) | Ecological system for deep water environment restoration and construction method thereof | |
| CN112337490B (en) | Mn-FeOCl material preparation and application method for catalytic degradation of malachite green in water | |
| CN104528872A (en) | Photocatalysis denitrification method through ismuth ferrite or carbon composite material of ismuth ferrite | |
| CN110606539B (en) | Method for treating organic wastewater by utilizing sludge resource | |
| WO2016206419A1 (en) | Domestic sewage treatment method | |
| CN111974404A (en) | Photo-assisted BiFe1-xCuxO3Method for treating residual ciprofloxacin in water body by activated peroxymonosulfate | |
| CN113117681A (en) | Method for treating industrial wastewater by enhanced Fenton | |
| CN111410237B (en) | Method for recycling waste polluted biomass | |
| CN108751581B (en) | Treatment process of biochemical effluent of landfill leachate | |
| CN104117348A (en) | Surplus sludge loaded photocatalyst as well as preparation method and application thereof | |
| CN204265477U (en) | A kind of photochemical catalysis water treating equipment of light guide media supported catalyst | |
| CN115814829B (en) | Co and Mo2C-codoped biochar-based composite material and preparation method and application thereof | |
| CN111533360A (en) | Treatment method of chromium-containing wastewater | |
| CN109896574B (en) | Carbon ferrite-titanium oxide multifunctional water purification material and preparation method thereof | |
| CN111215116A (en) | 3D defect carbon nitride photocatalytic material and preparation method and application thereof | |
| CN115430452A (en) | Nitrogen-modified biochar material and treatment method for organic polluted water body |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |