CN106082385A - A kind of heavy metal absorbent, its preparation method and application - Google Patents
A kind of heavy metal absorbent, its preparation method and application Download PDFInfo
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- CN106082385A CN106082385A CN201610589681.9A CN201610589681A CN106082385A CN 106082385 A CN106082385 A CN 106082385A CN 201610589681 A CN201610589681 A CN 201610589681A CN 106082385 A CN106082385 A CN 106082385A
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/02—Multi-step carbonising or coking 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
- 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
- B01J2220/485—Plants or land vegetals, e.g. cereals, wheat, corn, rice, sphagnum, peat moss
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of heavy metal absorbent, its preparation method and application, described heavy metal absorbent is to be air-dried by crucifer, the charcoal that pyrolysis obtains, Preparation Method is obtained through grinding, described crucifer is Caulis et Folium Brassicae junceae, Radix Raphani, Brassica campestris L, Chinese cabbage, Plantula Brassicae chinensis, Herba Capsellae or Caulis et Folium Brassicae capitatae etc., because containing more sulfhydryl compound in test finds crucifer body, the charcoal with sulfydryl can be obtained after pyrolysis, can adsorb with heavy metal ion, chelation, to Cd, Cu, Mn, Ni, the cation of the heavy metals such as Zn is respectively provided with higher affinity；Collect the crucifer bodies such as discarded Chinese cabbage, Caulis et Folium Brassicae junceae, charcoal is made in air-dried pyrolysis, it is possible not only to the discharge capacity realizing reducing rubbish, the recycling of waste resource, and there is stronger heavy metal adsorption, having broad application prospects containing directions such as the process of heavy metal water body, heavy-metal contaminated soil reparation and permeable reactive wall fillers.
Description
Technical field
The present invention relates to Heavy Metal Pollution Control technical field, particularly relate to a kind of heavy metal absorbent, its preparation method
And application.
Background technology
Charcoal refers to, under conditions of anoxia, biomass are carried out high-temperature process, oil in biomass is gentle burn or point
From rear collection, remaining solid matter is exactly mainly charcoal.The biomass resource of garbage is prepared as by charring process
Charcoal is developed can solve the challenge such as sustainable development and environmental conservation to a great extent, for ensureing
The sustainable use of National environment security and resource is significant.Charcoal is a kind of indissoluble, stable black solid
Material, has the microcellular structure of densification and huge specific surface area, it is possible to active adsorption stable inorganic ion and organic compound,
Can apply to the field such as soil improvement, water pollution improvement.The absorption property of charcoal and its raw material, preparation method and ratio
Surface areas etc. are closely related, and water body and heavy metal in soil are controlled by charcoal prepared by raw material conventional at present and technology
Reason effect is very limited.
Summary of the invention
The technical problem to be solved is to provide a kind of heavy metal absorbent, its preparation method and application.
The technical solution used in the present invention is:
The preparation method of a kind of heavy metal absorbent, comprises the following steps:
S1: take crucifer and air-dry；
S2: take the crucifer pyrolysis after air-drying, prepare charcoal；
S3: take described charcoal and grind, obtain heavy metal absorbent.
In a preferred embodiment, described crucifer is Caulis et Folium Brassicae junceae, Radix Raphani, Brassica campestris L, Chinese cabbage, Plantula Brassicae chinensis, Herba Capsellae or sweet
At least one in basket.
In a preferred embodiment, described S2 is pyrolyzed concretely comprises the following steps: with the programming rate liter of 300-1000 DEG C/h
Warm to 300-400 DEG C, constant temperature 20-50min, then it is warming up to 600-700 DEG C with the programming rate of 300-1000 DEG C/h, constant temperature 90-
180min。
In a preferred embodiment, described charcoal is ground to by described S3 particle diameter less than 1 μm.
Present invention also offers the heavy metal suction that the preparation method of a kind of heavy metal absorbent as above prepares
Attached dose.
Additionally, present invention also offers the administering method of a kind of heavy metal-polluted water, comprise the following steps；By as above institute
The heavy metal absorbent stated adds in heavy metal-polluted water, makes described heavy metal absorbent be fully contacted with polluted-water.
In a preferred embodiment, comprise the following steps；A permeable wall is prepared in heavy metal-polluted water flows through way
Or permeable dike, fill the heavy metal absorbent described in claim 5 in the inside of described permeable wall or described permeable dike.
Additionally, present invention also offers the administering method of a kind of heavy-metal contaminated soil, comprise the following steps: by as above institute
The heavy metal absorbent stated adds in heavy-metal contaminated soil, and stirring and evenly mixing, maintenance is stable.
The invention has the beneficial effects as follows:
The invention provides a kind of heavy metal absorbent, its preparation method and application, described heavy metal absorbent is to pass through
The charcoal that crucifer air-dries, pyrolysis obtains, obtains Preparation Method through grinding, and described crucifer is mustard
Dish, Radix Raphani, Brassica campestris L, Chinese cabbage, Plantula Brassicae chinensis, Herba Capsellae or Caulis et Folium Brassicae capitatae etc., because containing more mercapto in test finds crucifer body
Based compound, can obtain the charcoal with sulfydryl after pyrolysis, can adsorb with heavy metal ion, chelation, to Cd,
The cation of the heavy metals such as Cu, Mn, Ni, Zn is respectively provided with higher affinity；Collect the Cruciferae such as discarded Chinese cabbage, Caulis et Folium Brassicae junceae
Plant, air-dried pyrolysis makes charcoal, is possible not only to the discharge capacity realizing reducing rubbish, the recycling of waste resource, and
There is stronger heavy metal adsorption, filling out containing the process of heavy metal water body, heavy-metal contaminated soil reparation and permeable reactive wall
The directions such as material have broad application prospects.
Accompanying drawing explanation
Fig. 1 is the energy spectrogram of heavy metal absorbent II；
Fig. 2 is the energy spectrogram of shell charcoal；
Fig. 3 is heavy metal absorbent II and the infrared spectrogram of shell charcoal.
Detailed description of the invention
Embodiment 1:
To be collected from the discarded Caulis et Folium Brassicae junceae natural air drying of food market, charcoal is prepared in oxygen barrier pyrolysis under nitrogen protection, uses
Equipment be tubular type Muffle furnace, pyrolysis temperature program is: 1. with the heating rate of 500 DEG C/h from room temperature to 350 DEG C, 2.
350 DEG C of constant temperature 30min, are 3. warming up to 650 DEG C with the heating rate of 500 DEG C/h from 350 DEG C, 4. 650 DEG C of constant temperature 120min, 5. certainly
So cooling；Use ball mill grinding to particle diameter less than 1 micron the charcoal fired, obtain heavy metal absorbent I.
Embodiment 2:
Collection is discarded Brassica campestris L, natural air drying, and charcoal is prepared in the Brassica campestris L oxygen barrier pyrolysis under nitrogen protection after air-drying,
The equipment used is tubular type Muffle furnace, and pyrolysis temperature program is: 1. with the heating rate of 500 DEG C/h from room temperature to 350 DEG C,
2. 350 DEG C of constant temperature 30min, are 3. warming up to 650 DEG C with the heating rate of 500 DEG C/h from 350 DEG C, 4. 650 DEG C of constant temperature 120min, 5.
Temperature fall；Use ball mill grinding to particle diameter less than 1 micron the charcoal fired, obtain heavy metal absorbent II.
Embodiment 3:
Collection is discarded Chinese cabbage, natural air drying, and charcoal is prepared in the Chinese cabbage oxygen barrier pyrolysis under nitrogen protection after air-drying,
The equipment used is tubular type Muffle furnace, and pyrolysis temperature program is: 1. with the heating rate of 1000 DEG C/h from room temperature to 400
DEG C, 2. 400 DEG C of constant temperature 20min, 3. it is warming up to 600 DEG C with the heating rate of 300 DEG C/h from 400 DEG C, 4. 600 DEG C of constant temperature
180min, 5. Temperature fall；Use ball mill grinding to particle diameter less than 1 micron the charcoal fired, obtain heavy metal adsorption
Agent III.
Embodiment 4:
Rape stalk charcoal is prepared in Radix Raphani oxygen barrier pyrolysis under nitrogen protection after air-drying, and the equipment of use is tubular type
Muffle furnace, pyrolysis temperature program is: 1. with the heating rate of 500 DEG C/h from room temperature to 350 DEG C, 2. 350 DEG C of constant temperature
30min, is 3. warming up to 650 DEG C with the heating rate of 1000 DEG C/h from 350 DEG C, 4. 650 DEG C of constant temperature 120min, 5. Temperature fall；
Use ball mill grinding to particle diameter less than 1 micron the charcoal fired, obtain heavy metal absorbent IV.
Embodiment 5:
Rape stalk charcoal is prepared in rape stalk oxygen barrier pyrolysis under nitrogen protection after air-drying, and the equipment of use is
Tubular type Muffle furnace, pyrolysis temperature program is: 1. with the heating rate of 300 DEG C/h from room temperature to 400 DEG C, 2. 400 DEG C of constant temperature
50min, is 3. warming up to 700 DEG C with the heating rate of 500 DEG C/h from 400 DEG C, 4. 700 DEG C of constant temperature 90min, 5. Temperature fall；Will
The charcoal fired uses ball mill grinding to particle diameter less than 1 micron, obtains heavy metal absorbent V.
1, the removal ability contrast test of heavy metal in each Adsorbent For Removal of Heavy
Heavy metal absorbent II that heavy metal absorbent I that Example 1 prepares, embodiment 2 prepare, dried leaf mustard powder,
Herba Rorippae stalk powder and commercially available shell charcoal carry out heavy metal in water adsorption experiment, the addition of adsorbent in each group test
Being 1g/L, vibrate under room temperature condition 180min, obtains experimental result such as table 1.
The removal ability contrast test data of heavy metal in each Adsorbent For Removal of Heavy of table 1
Result of the test from table 1 is it can be seen that heavy metal absorbent I and the heavy metal adsorption of heavy metal absorbent II
It is significantly stronger than the most common shell charcoal, and the heavy metal adsorption of heavy metal absorbent I is better than dried leaf mustard powder
End, the heavy metal adsorption of heavy metal absorbent II is better than Herba Rorippae stalk powder, illustrates that employing the method for the invention will
Crucifer carries out after pyrolysis prepares charcoal, and Heavy Metals in Waters Cd, Cu, Mn, Ni, Zn absorbability is shown by it
Work enhances.Heavy metal absorbent I is respectively 98.98% to Cd, Cu, Mn, Ni, Zn clearance in water body, 98.92%,
Cd, Cu, Mn, Ni, Zn clearance in water body is respectively by 99.99%, 99.98% and 98.50%, heavy metal absorbent II
98.96%, 98.84%, 89.45%, 97.29% and 99.86%.Illustrate to use crucifer to prepare charcoal, permissible
Strengthening its absorbability to Heavy Metals in Waters, can be used for heavy metal-polluted water and administer, it is to various heavy in water body
Adsorption effect be better than commercially available shell charcoal.
2, the repair ability contrast test of each ABSORBENTS ABSORPTION metallic pollution soil
Gathering the contaminated soil sample in certain plating place, area, Pearl River Delta, dress 150g is to multiple 250mL beakers respectively；Press
The mass ratio of 2% adds heavy metal absorbent II, Herba Rorippae stalk powder and the commercially available shell biology that embodiment 2 prepares
Charcoal, stirring and evenly mixing, use masking foil to seal after being again stirring for mixing after adding ultra-pure water 75mL；Maintenance samples after stablizing 10 days, presses
The Leaching of Heavy Metals concentration measuring sample is analyzed according to HJ/T299-2007.Experimental result such as table 2.
The repair ability comparative test result of table 2 each ABSORBENTS ABSORPTION metallic pollution soil
From table 2, result of the test understands, and adds heavy metal absorbent II, maintenance stablize 10 days after stain soil Cu, Zn,
The leaching concentration of Cr, Ni respectively have dropped 43.72%, 69.97%, 43.86% and 39.67%, hence it is evident that is better than Herba Rorippae straw
Stalk powder and shell charcoal.Visible heavy metal absorbent of the present invention can effectively reduce many in heavy-metal contaminated soil
The leaching concentration of heavy metal species, and there is preferable repair ability.
3, energy spectrum analysis and infrared analysis
Heavy metal absorbent II that Example 2 prepares and commercially available shell charcoal carry out energy spectrum analysis and infrared point
Analysis, obtains energy spectrogram such as Fig. 1 of heavy metal absorbent II, the quantitative elementary analysis result of heavy metal absorbent II such as table 3, shell
Energy spectrogram such as Fig. 2 of charcoal, the quantitative elementary analysis result of shell charcoal such as table 4, heavy metal absorbent II and shell are raw
The infrared spectrogram of thing charcoal such as Fig. 3.According to Fig. 1 and Fig. 2, it can be seen that heavy metal absorbent II contains a small amount of S, and combines
The infrared spectrum map analysis of Fig. 3, heavy metal absorbent II is at 2530cm-1There are a more weak sulfydryl characteristic absorption peak, explanation in place
Heavy metal absorbent II contains a small amount of sulfhydryl compound.
The quantitative elementary analysis result of table 3 heavy metal absorbent II
| Element | Wt% | At% |
| C-K | 73.22 | 84.42 |
| O-K | 10.57 | 09.14 |
| Na-K | 00.18 | 00.11 |
| Si-K | 03.59 | 01.77 |
| P-K | 00.14 | 00.06 |
| S-K | 01.33 | 00.58 |
| Cl-K | 01.37 | 00.53 |
| K-K | 08.15 | 02.89 |
| Ca-K | 01.45 | 00.50 |
The quantitative elementary analysis result of table 4 shell charcoal
| Element | Wt% | At% |
| C-K | 76.28 | 85.13 |
| O-K | 12.35 | 10.34 |
| Mg-K | 01.78 | 00.98 |
| Al-K | 00.59 | 00.30 |
| Si-K | 02.62 | 01.25 |
| Ca-K | 04.84 | 01.62 |
| Ti-K | 00.29 | 00.08 |
| Mn-K | 00.30 | 00.07 |
| Fe-K | 00.94 | 00.23 |
Claims (8)
1. the preparation method of a heavy metal absorbent, it is characterised in that comprise the following steps:
S1: take crucifer and air-dry；
S2: take the crucifer pyrolysis after air-drying, prepare charcoal；
S3: take described charcoal and grind, obtain heavy metal absorbent.
The preparation method of heavy metal absorbent the most according to claim 1, it is characterised in that described crucifer is
At least one in Caulis et Folium Brassicae junceae, Radix Raphani, Brassica campestris L, Chinese cabbage, Plantula Brassicae chinensis, Herba Capsellae or Caulis et Folium Brassicae capitatae.
The preparation method of heavy metal absorbent the most according to claim 1, it is characterised in that the concrete step of pyrolysis in described S2
Suddenly it is: be warming up to 300-400 DEG C with the programming rate of 300-1000 DEG C/h, constant temperature 20-50min, then with 300-1000 DEG C/h's
Programming rate is warming up to 600-700 DEG C, constant temperature 90-180min.
The preparation method of heavy metal absorbent the most according to claim 1, it is characterised in that by described biology in described S3
Charcoal is ground to particle diameter less than 1 μm.
5. the heavy metal adsorption prepared by the preparation method of the heavy metal absorbent described in any one of claim 1-4
Agent.
6. the administering method of a heavy metal-polluted water, it is characterised in that comprise the following steps；Described in claim 5
Heavy metal absorbent adds in heavy metal-polluted water, makes described heavy metal absorbent be fully contacted with polluted-water.
The administering method of a kind of heavy metal-polluted water the most according to claim 6, it is characterised in that include following step
Suddenly；A permeable wall or permeable dike is prepared, in described permeable wall or described permeable dike in heavy metal-polluted water flows through way
The heavy metal absorbent described in claim 5 is filled in portion.
8. the administering method of a heavy-metal contaminated soil, it is characterised in that comprise the following steps: described in claim 5
Heavy metal absorbent adds in heavy-metal contaminated soil, and stirring and evenly mixing, maintenance is stable.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580719A (en) * | 2017-02-22 | 2017-04-26 | 广州市聚吉科绿色化学共性技术研究院有限公司 | Jelly facial mask capable of adsorbing heavy metals |
| CN107116096A (en) * | 2017-05-16 | 2017-09-01 | 湖北加德科技股份有限公司 | A kind of pyrolyzing sludge carbon and the united heavy metal soil remediation method of bioanalysis |
| CN108176361A (en) * | 2018-02-06 | 2018-06-19 | 广东环境保护工程职业学院 | Sulfhydryl modified charcoal based on agricultural wastes and its preparation method and application |
| CN108359471A (en) * | 2018-03-10 | 2018-08-03 | 扬州工业职业技术学院 | A kind of bagasse sill of modification and its application in environmental protection |
| CN108441225A (en) * | 2018-03-15 | 2018-08-24 | 东北大学 | A kind of reparation medicament and preparation method thereof for repairing mercury contaminated soil |
| CN109013679A (en) * | 2018-09-07 | 2018-12-18 | 陕西理工大学 | A kind of absorption method for blocking and controlling of Shan south tea garden soil heavy metal Cd |
| CN109092248A (en) * | 2018-09-21 | 2018-12-28 | 深圳大学 | A kind of biology carbon material and the preparation method and application thereof |
| CN109675522A (en) * | 2019-01-31 | 2019-04-26 | 中国农业科学院农业环境与可持续发展研究所 | A kind of high-performance consolidates the preparation method and application of Cd biomass carbon |
| CN110148529A (en) * | 2019-05-31 | 2019-08-20 | 河南师范大学 | A kind of preparation method of the supercapacitor based on multi-stage porous carbon material working electrode |
| CN110314686A (en) * | 2018-03-28 | 2019-10-11 | N2细胞股份有限公司 | The preparation method and catalyst of catalyst |
| CN110813231A (en) * | 2019-10-22 | 2020-02-21 | 华南农业大学 | Method for restoring Cd and Cu pollution by using biochar prepared from invasive plant Bidens pilosa |
| CN112250503A (en) * | 2020-10-26 | 2021-01-22 | 沈阳瑞元德生物科技有限公司 | Natural adsorption material compounded bio-organic fertilizer and preparation method thereof |
| CN113877525A (en) * | 2021-09-10 | 2022-01-04 | 中国地质大学（武汉） | Method for restoring heavy metal polluted water body by magnetic coke |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580719A (en) * | 2017-02-22 | 2017-04-26 | 广州市聚吉科绿色化学共性技术研究院有限公司 | Jelly facial mask capable of adsorbing heavy metals |
| CN107116096A (en) * | 2017-05-16 | 2017-09-01 | 湖北加德科技股份有限公司 | A kind of pyrolyzing sludge carbon and the united heavy metal soil remediation method of bioanalysis |
| CN108176361A (en) * | 2018-02-06 | 2018-06-19 | 广东环境保护工程职业学院 | Sulfhydryl modified charcoal based on agricultural wastes and its preparation method and application |
| CN108359471A (en) * | 2018-03-10 | 2018-08-03 | 扬州工业职业技术学院 | A kind of bagasse sill of modification and its application in environmental protection |
| CN108441225A (en) * | 2018-03-15 | 2018-08-24 | 东北大学 | A kind of reparation medicament and preparation method thereof for repairing mercury contaminated soil |
| CN110314686A (en) * | 2018-03-28 | 2019-10-11 | N2细胞股份有限公司 | The preparation method and catalyst of catalyst |
| CN109013679A (en) * | 2018-09-07 | 2018-12-18 | 陕西理工大学 | A kind of absorption method for blocking and controlling of Shan south tea garden soil heavy metal Cd |
| CN109092248A (en) * | 2018-09-21 | 2018-12-28 | 深圳大学 | A kind of biology carbon material and the preparation method and application thereof |
| CN109092248B (en) * | 2018-09-21 | 2021-06-01 | 深圳大学 | Biological carbon material and preparation method and application thereof |
| CN109675522A (en) * | 2019-01-31 | 2019-04-26 | 中国农业科学院农业环境与可持续发展研究所 | A kind of high-performance consolidates the preparation method and application of Cd biomass carbon |
| CN110148529A (en) * | 2019-05-31 | 2019-08-20 | 河南师范大学 | A kind of preparation method of the supercapacitor based on multi-stage porous carbon material working electrode |
| CN110813231A (en) * | 2019-10-22 | 2020-02-21 | 华南农业大学 | Method for restoring Cd and Cu pollution by using biochar prepared from invasive plant Bidens pilosa |
| CN112250503A (en) * | 2020-10-26 | 2021-01-22 | 沈阳瑞元德生物科技有限公司 | Natural adsorption material compounded bio-organic fertilizer and preparation method thereof |
| CN113877525A (en) * | 2021-09-10 | 2022-01-04 | 中国地质大学（武汉） | Method for restoring heavy metal polluted water body by magnetic coke |
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