CN116237013A - Carbon material based on biomass and eutectic solvent and wastewater adsorption treatment method - Google Patents
Carbon material based on biomass and eutectic solvent and wastewater adsorption treatment method Download PDFInfo
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- CN116237013A CN116237013A CN202310061110.8A CN202310061110A CN116237013A CN 116237013 A CN116237013 A CN 116237013A CN 202310061110 A CN202310061110 A CN 202310061110A CN 116237013 A CN116237013 A CN 116237013A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 77
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 74
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 73
- 230000005496 eutectics Effects 0.000 title claims abstract description 56
- 239000002904 solvent Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002028 Biomass Substances 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 238000010304 firing Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 32
- 229910052740 iodine Inorganic materials 0.000 claims description 32
- 239000011630 iodine Substances 0.000 claims description 32
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 24
- 241001092040 Crataegus Species 0.000 claims description 15
- 235000009917 Crataegus X brevipes Nutrition 0.000 claims description 15
- 235000013204 Crataegus X haemacarpa Nutrition 0.000 claims description 15
- 235000009685 Crataegus X maligna Nutrition 0.000 claims description 15
- 235000009444 Crataegus X rubrocarnea Nutrition 0.000 claims description 15
- 235000009486 Crataegus bullatus Nutrition 0.000 claims description 15
- 235000017181 Crataegus chrysocarpa Nutrition 0.000 claims description 15
- 235000009682 Crataegus limnophila Nutrition 0.000 claims description 15
- 235000004423 Crataegus monogyna Nutrition 0.000 claims description 15
- 235000002313 Crataegus paludosa Nutrition 0.000 claims description 15
- 235000009840 Crataegus x incaedua Nutrition 0.000 claims description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical group C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 claims description 8
- 229910001385 heavy metal Inorganic materials 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 235000013399 edible fruits Nutrition 0.000 claims description 6
- 239000011877 solvent mixture Substances 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 2
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 2
- 229910001453 nickel ion Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims 1
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 2
- 235000007106 Crataegus suborbiculata Nutrition 0.000 abstract 1
- 241000073432 Crataegus suborbiculata Species 0.000 abstract 1
- 235000013202 a hawthorn Nutrition 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 32
- 238000002835 absorbance Methods 0.000 description 16
- 239000007864 aqueous solution Substances 0.000 description 16
- 239000000706 filtrate Substances 0.000 description 16
- 238000002798 spectrophotometry method Methods 0.000 description 16
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 239000000975 dye Substances 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 description 2
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 201000001320 Atherosclerosis Diseases 0.000 description 1
- 206010006002 Bone pain Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010018498 Goitre Diseases 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 208000009453 Thyroid Nodule Diseases 0.000 description 1
- 206010043693 Thyroid atrophy Diseases 0.000 description 1
- 208000024770 Thyroid neoplasm Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 208000016627 atrophy of thyroid Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 201000003872 goiter Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 210000001685 thyroid gland Anatomy 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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
- 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
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The application discloses a carbon material based on biomass and eutectic solvent and a wastewater adsorption treatment method, belongs to the field of wastewater treatment, and seeks a more ways and modes for wastewater and wastewater treatment. The technical scheme of the application includes that the method comprises the steps of preparing a eutectic solvent, mixing a hawthorn biomass raw material with the eutectic solvent, firing the mixture of the eutectic solvent at a high temperature, preparing a carbon material in a carbon shape after firing, and treating dye wastewater by means of the carbon material. The invention has the advantages that the defects of the prior art can be overcome, the carbon material is simple to prepare, the cost is low, the adsorption efficiency is high, and the wastewater adsorption treatment method is environment-friendly and has considerable practical application value.
Description
Technical Field
The invention relates to a carbon material based on biomass and eutectic solvent and a wastewater adsorption treatment method, and belongs to the field of wastewater treatment.
Background
The printing and dyeing industry is taken as one of the traditional prop industry in China, and along with the continuous development of the industry, the printing and dyeing wastewater becomes a main water pollution source in China. Most dyes are aromatic compounds, have toxicity, have complex structures and are difficult to degrade, and can cause great threat to human health. Heavy metal ions are discharged into the water body and are transmitted through a food chain to be enriched in certain organs of the human body, so that diseases such as aquatic diseases, bone pain diseases and the like are caused. Iodine content in the human body directly affects the structure and function of thyroid glands, and excessive iodine can cause goiter, thyroid nodule or atrophy. Therefore, the preparation of the novel adsorbent has great significance in realizing the efficient adsorption of common pollutants in wastewater.
Hawthorn is a plant which grows widely in China. After the hawthorn fruit is sold and used for pharmacy, leaves of the hawthorn fruit are often wasted. However, the total flavonoids contained in the hawthorn leaves have medical value of resisting atherosclerosis and reducing blood sugar through scientific researches, and the tea polyphenol in the hawthorn leaves can be applied to feeds, so that the application prospect is considerable. The eutectic solvent is a multicomponent eutectic formed by combining a hydrogen bond acceptor and a hydrogen bond donor, which is first reported in 2003, and has the advantages of simple synthesis, high atomic utilization rate, good biocompatibility and the like. Therefore, the preparation of the carbon material based on the hawthorn biomass and the eutectic solvent for adsorbing common pollutants in wastewater has important practical application value for wastewater treatment.
Disclosure of Invention
The invention provides a biomass and eutectic solvent-based carbon material and a wastewater adsorption treatment method, wherein the carbon material is simple to prepare, low in cost and high in adsorption efficiency, and the wastewater adsorption treatment method is environment-friendly and has considerable practical application value.
In order to solve the technical problems, the technical scheme adopted by the invention is that the carbon material based on biomass and eutectic solvent is characterized in that: the preparation method comprises the following steps:
1) Preparing a eutectic solvent, and mixing a hydrogen bond donor and a hydrogen bond acceptor of the eutectic solvent;
2) Mixing biomass and a eutectic solvent to prepare a eutectic solvent mixture;
3) Firing the eutectic solvent mixture in the step 2) at high temperature, and obtaining the carbon material in a carbon shape after firing.
Preferably, the biomass and eutectic solvent-based carbon material has a hydrogen bond donor of ethylene glycol and a hydrogen bond acceptor of 1, 8-diazabicyclo [5.4.0] undec-7-ene.
Preferably, the molar ratio of the hydrogen bond donor in the eutectic solvent to the hydrogen bond acceptor in the eutectic solvent is 4:1.
Optimally, the carbon material based on biomass and eutectic solvent is one or a mixture of two of hawthorn fruits and hawthorn leaves; biomass and eutectic solvent are mixed according to the mass ratio of 2:1.
Preferably, in the above carbon material based on biomass and eutectic solvent, in step 3), the firing temperature of the eutectic solvent mixture is 500 degrees celsius, and the firing time is maintained for 4 hours.
Preferably, the biomass and eutectic solvent-based carbon material is treated before the step 2), wherein the treatment process is as follows: mixing biomass and water according to a mass ratio of 1:2, heating for 20 minutes, putting into a high-speed centrifuge, 8000 revolutions per minute for Zhong Lixin minutes, and taking out a lower sediment after centrifugation; the lower precipitate was mixed with the eutectic solvent.
A wastewater adsorption treatment method is characterized in that the wastewater is adsorbed by using the carbon material prepared by the biomass and eutectic solvent-based carbon material, wherein the wastewater is wastewater containing pollutant iodine, wastewater containing dye or wastewater containing heavy metal ions.
Preferably, in the wastewater adsorption treatment method, the concentration of iodine in wastewater containing pollutant iodine is 0.790 millimoles per liter, the concentration of dye in wastewater containing dye is 10 micromoles per liter, and the concentration of heavy metal ion nickel ion in wastewater containing heavy metal ion is 9.886 millimoles per liter.
Optimally, according to the wastewater adsorption treatment method, the proportion of wastewater to be adsorbed to carbon materials is 5 milliliters: 0.15 g to 15 ml: 0.05 g.
Preferably, according to the wastewater adsorption treatment method, when the carbon material adsorbs wastewater, the adsorption temperature is normal temperature, and the adsorption time is 1 hour.
Preferably, in the wastewater adsorption treatment method, before the carbon material adsorbs wastewater, the carbon material is ground into powder.
In the technical scheme of the application, the carbon material is prepared from the hawthorn biomass and the eutectic solvent, the preparation process is simple, the eutectic solvent is formed by using ethylene glycol and 1, 8-diazabicyclo [5.4.0] undec-7-ene, the method is environment-friendly, the raw material cost is lower than that of other materials, and the cost can be effectively saved.
The prepared carbon material is used for purifying wastewater, has high adsorption efficiency and has considerable practical application value in the aspect of wastewater treatment.
Detailed Description
The technical features of the present invention are further described below in conjunction with specific embodiments.
The invention provides a carbon material based on biomass and eutectic solvent, and provides a method for wastewater adsorption treatment by using the carbon material.
Wherein the chemical formulas of the ethylene glycol and the 1, 8-diazabicyclo [5.4.0] undec-7-ene (DBU) of the eutectic solvent are as follows,
the chemical formula of the dye is as follows:
example 1
A biomass and eutectic solvent based carbon material, comprising the specific steps of:
grinding and crushing the hawthorn fruits by using a crusher, mixing the hawthorn fruits with water according to a mass ratio of 1:2, heating for 20 minutes, and placing the mixture into a high-speed centrifuge at 8000 revolutions per minute for Zhong Lixin minutes. And taking the sediment at the lower layer after centrifugation.
Ethylene glycol DBU was added to the reagent bottle in a molar ratio of 4:1. The mixture in the reagent bottle is stirred at 25 ℃ until the mixture is fully dissolved, and the eutectic solvent ethylene glycol DBU (4:1) is generated.
Mixing the obtained precipitate with the eutectic solvent according to the mass ratio of 2:1, and putting the mixture into a muffle furnace to burn at 500 ℃ for 4 hours to obtain the carbon material. Cooling to room temperature, placing into a dry and clean mortar, grinding, and storing in a reagent bottle for later use.
The specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 94.43 percent by spectrophotometry.
Example 2
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of methylene blue having a concentration of 10. Mu. Mol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 662 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 99.66% measured by spectrophotometry.
Example 3
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of rhodamine B at a concentration of 10. Mu. Mol/liter was added and the mixture was put into a magnet.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 554 nm using a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 99.19 percent by spectrophotometry.
Example 4
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of nickel sulfate hexahydrate having a concentration of 9.886 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 393 nm wavelength by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 11.94% by spectrophotometry.
Example 5
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 10 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 98.03 percent by spectrophotometry.
Example 6
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 15 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 99.02 percent by spectrophotometry.
Example 7
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.10 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 90.49 percent by spectrophotometry.
Example 8
This embodiment differs from embodiment 1 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.15 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 84.92 percent by spectrophotometry.
Example 9
A biomass and eutectic solvent based carbon material, comprising the specific steps of:
crushing the hawthorn She Damo by using a crusher, mixing the hawthorn leaves with water according to the mass ratio of 1:2, heating for 20 minutes, and placing into a high-speed centrifuge, wherein 8000 revolutions per minute is Zhong Lixin minutes. And taking the sediment at the lower layer after centrifugation.
Ethylene glycol DBU was added to the reagent bottle in a molar ratio of 4:1. The mixture in the reagent bottle is stirred at 25 ℃ until the mixture is fully dissolved, and the eutectic solvent ethylene glycol DBU (4:1) is generated.
Mixing the obtained precipitate with the eutectic solvent according to the mass ratio of 2:1, and putting the mixture into a muffle furnace to burn at 500 ℃ for 4 hours to obtain the carbon material. Cooling to room temperature, placing into a dry and clean mortar, grinding, and storing in a reagent bottle for later use.
The specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 94.75% by spectrophotometry.
Example 10
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of methylene blue having a concentration of 10. Mu. Mol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 662 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 100.00% measured by spectrophotometry.
Example 11
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of rhodamine B at a concentration of 10. Mu. Mol/liter was added and the mixture was put into a magnet.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 554 nm using a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 99.91 percent by spectrophotometry.
Example 12
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of nickel sulfate hexahydrate having a concentration of 9.886 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at 393 nm wavelength by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 28.36 percent by spectrophotometry.
Example 13
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 10 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 95.41 percent by spectrophotometry.
Example 14
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.05 g of carbon material was weighed out at the bottom of a glass bottle, 15 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 96.39 percent by spectrophotometry.
Example 15
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.10 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 87.87 percent by spectrophotometry.
Example 16
This embodiment differs from embodiment 9 in that:
the specific steps of the wastewater adsorption treatment method in this embodiment include:
0.15 g of carbon material was weighed out at the bottom of a glass bottle, 5 ml of an aqueous solution of iodine having a concentration of 0.790 mmol/l was added and a magnet was placed.
The glass bottle is placed in an oil bath pot, and is stirred at 25 ℃ for 1 hour.
After the adsorption, the mixture was filtered by a needle filter, and the absorbance of the filtrate was measured at a wavelength of 462 nm by a spectrophotometer. The adsorption rate of the carbon material to iodine in the wastewater is 85.90 percent by spectrophotometry.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that various changes, modifications, additions and substitutions can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A biomass and eutectic solvent based carbon material characterized by: the preparation method comprises the following steps:
1) Preparing a eutectic solvent, and mixing a hydrogen bond donor and a hydrogen bond acceptor of the eutectic solvent;
2) Mixing biomass and a eutectic solvent to prepare a eutectic solvent mixture;
3) Firing the eutectic solvent mixture in the step 2) at high temperature, and obtaining the carbon material in a carbon shape after firing.
2. The biomass and eutectic solvent based carbon material of claim 1, wherein: the hydrogen bond donor of the eutectic solvent is ethylene glycol, and the hydrogen bond acceptor of the eutectic solvent is 1, 8-diazabicyclo [5.4.0] undec-7-ene.
3. The biomass and eutectic solvent based carbon material of claim 1, wherein: the molar ratio of the hydrogen bond donor in the eutectic solvent to the hydrogen bond acceptor in the eutectic solvent is 4:1.
4. The biomass and eutectic solvent based carbon material of claim 1, wherein: the biomass is one or a mixture of two of hawthorn fruits and hawthorn leaves; biomass and eutectic solvent are mixed according to the mass ratio of 2:1.
5. The biomass and eutectic solvent based carbon material of claim 1, wherein: in step 3), the firing temperature of the eutectic solvent mixture upon firing was 500 degrees celsius and the temperature firing time was maintained for 4 hours.
6. The biomass and eutectic solvent based carbon material of claim 1, wherein: before the step 2), biomass is treated, wherein the treatment process is as follows: mixing biomass and water according to a mass ratio of 1:2, heating for 20 minutes, putting into a high-speed centrifuge, 8000 revolutions per minute for Zhong Lixin minutes, and taking out a lower sediment after centrifugation; the lower precipitate was mixed with the eutectic solvent.
7. A wastewater adsorption treatment method is characterized in that: adsorbing wastewater using the carbon material prepared based on biomass and eutectic solvent according to any one of claims 1 to 5, wherein the wastewater is wastewater containing contaminant iodine, wastewater containing dye, or wastewater containing heavy metal ions.
8. The wastewater adsorption treatment method according to claim 7, wherein: the concentration of iodine in the wastewater containing pollutant iodine was 0.790 mmol/liter, the concentration of dye in the wastewater containing dye was 10. Mu. Mol/liter, and the concentration of heavy metal ion nickel ion in the wastewater containing heavy metal ion was 9.886 mmol/liter.
9. The wastewater adsorption treatment method according to claim 7, wherein: the ratio of waste water to carbon material to be adsorbed is per 5 ml: 0.15 g to 15 ml: 0.05 g.
10. The wastewater adsorption treatment method according to claim 7, wherein: when the carbon material adsorbs the wastewater, the adsorption temperature is normal temperature, and the adsorption time is 1 hour; the carbon material is ground into powder before the carbon material adsorbs the wastewater.
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