CN107364976A - A kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound - Google Patents
A kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound Download PDFInfo
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- CN107364976A CN107364976A CN201710621280.1A CN201710621280A CN107364976A CN 107364976 A CN107364976 A CN 107364976A CN 201710621280 A CN201710621280 A CN 201710621280A CN 107364976 A CN107364976 A CN 107364976A
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- graphene oxide
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
Abstract
The invention belongs to water purification agent technical field, more particularly to a kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound.The preparation method of the attapulgite modified water purification agent of graphene oxide compound of the present invention, the simple science of preparation method is green, will not produce pollution to environment, cost is low；Pass through graphene oxide, attapulgite modified compound obtained water purification agent, graphene oxide has unique layer structure and larger specific surface area, considerably increase the adsorption bleaching ability of modified attapulgite, it is strong to sewage treatment capacity, flocculation decoloration, deodorization, COD clearance positive effect strong to the adsorption capacity of heavy metal in sewage, modified attapulgite penus natural nano-material, it is green, secondary pollution will not be caused to environment, meet environmentally friendly product.
Description
Technical field
The invention belongs to water purification agent technical field, more particularly to a kind of attapulgite modified water purification of graphene oxide compound
The preparation method of agent.
Background technology
In rapid industrial development, substantial amounts of industrial wastewater can be produced unavoidably, contains substantial amounts of heavy metal in industrial wastewater,
The growing environment of aquatile is directly endangered, causes river pollution, water quality of river is reduced, influences urbanite water consumption environment, can also make
Into soil pollution, edaphon environment is influenceed, and then influence the whole ecosystem.At present, Industrial Wastewater Treatment can substantially divide
For physics, chemistry and biological three classes；The physical method cycle is grown, and cost is high；Chemical method speed is fast, and effect is good；Biological method skill
Art is also immature.
The content of the invention
Goal of the invention：In order to overcome problem above, it is an object of the invention to provide a kind of modification of graphene oxide compound
The preparation method of attapulgite water purification agent.
Technical scheme：It is an object of the invention to provide a kind of attapulgite modified water purification agent of graphene oxide compound
Preparation method, comprise the following steps：
（1）Prepare graphene oxide compound：Oligomeric 3- aminopropyl triethoxysilanes are added into graphene oxide moisture to dissipate
Flocculation sediment is obtained in liquid；Under the catalysis of carbodiimides, above-mentioned flocculation sediment and poly- propionamide are reacted to obtain third
Acrylamide oligomer graphene oxide；Sulphur is added into the aqueous solution of acrylamide oligomers graphene oxide obtained above
Urea, graphene oxide compound is made by water bath Method, washing, which is freeze-dried, to be produced；
（2）Prepare attapulgite modified：Natural attapulgite is crushed to 100-200 mesh, adds the deionized water of 4-6 times of weight
Be made mud in suspension, then by ultrasound it is fully dispersed after, after taking upper suspension centrifugal treating, vacuum filtration is dried to obtain bumps
Rod soil；The attapulgite obtained after above-mentioned processing is placed in flask, after adding 2mol/ hydrochloric ultrasonic waves 10-20min, vacuum is taken out
Filter, vacuum drying chamber drying and grinding to 100-200 mesh obtains attapulgite modified after deionized water cleaning；
（3）According to proportioning by step（1）Obtained graphene oxide compound and step（2）Obtained attapulgite modified and powder
Last activated carbon, vinyltrimethoxy silane, compound microorganism bacterium powder are added in round-bottomed flask, add water to be placed in after stirring
Ultrasonic 30-40min under Ultrasonic Conditions, vacuum drying chamber is dried after vacuum filtration, is ground to 100-200 mesh and is produced graphite oxide
The attapulgite modified water purification agent of alkene compound.
Preferably, described step（1）In oligomeric 3- aminopropyl triethoxysilanes by 3- aminopropyl-triethoxy silicon
Alkane obtains by hydrolysis, and mean molecule quantity is 225-20000, and wherein hydrolysis hydrolysis temperature is 38-48 DEG C, hydrolysis
Time is 2-6h.
Preferably, the step（1）Middle graphene oxide particle diameter is 50-500nm.
Preferably, described step（1）Middle polyacrylamide number-average molecular weight is 2,000,000-300 ten thousand.
Preferably, the step（1）The mol ratio of middle graphene oxide and thiocarbamide is 1:0.5-5.
Preferably, the step（2）Middle centrifugal rotational speed is 1500-3000r/min, centrifugation time 5-8min.
Preferably, the step（2）The mass ratio of middle hydrochloric acid and attapulgite is 1mL:3g-5g.
Preferably, the step（3）Compound microorganism bacterium powder include saccharomycete and bacillus subtilis.
Preferably, the step（3）In the ratio of each component is：Graphene oxide compound 15-25 parts, modified attapulgite
Native 30-50 parts, Powdered Activated Carbon 3-5 parts, vinyltrimethoxy silane 0.5-1.5 parts, compound microorganism bacterium powder 1-2 parts.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：Graphene oxide of the present invention is answered
The preparation method of polymer modified attapulgite water purification agent, the invention belongs to water purification agent technical field, more particularly to a kind of oxidation stone
The preparation method of the black attapulgite modified water purification agent of alkene compound.Graphene oxide compound modified attapulgite of the present invention
The preparation method of native water purification agent, the simple science of preparation method is green, will not produce pollution to environment, cost is low；Pass through oxygen
Graphite alkene, attapulgite modified compound obtained water purification agent, graphene oxide have unique layer structure and larger ratio table
Area, the adsorption bleaching ability of modified attapulgite is considerably increased, it is strong to sewage treatment capacity, to heavy metal in sewage
Adsorption capacity it is strong, flocculation decoloration, deodorization, COD clearance positive effects, modified attapulgite penus natural nano-material, green
Environmental protection, secondary pollution will not be caused to environment, meet environmentally friendly product.
Embodiment
With reference to specific embodiment, the present invention is furture elucidated.
Embodiment 1
A kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound,
Comprise the following steps：
（1）Prepare graphene oxide compound：Oligomeric 3- aminopropyl triethoxysilanes are added into graphene oxide moisture to dissipate
Flocculation sediment is obtained in liquid；Under the catalysis of carbodiimides, above-mentioned flocculation sediment and poly- propionamide are reacted to obtain third
Acrylamide oligomer graphene oxide；Sulphur is added into the aqueous solution of acrylamide oligomers graphene oxide obtained above
Urea, graphene oxide compound is made by water bath Method, washing, which is freeze-dried, to be produced；
（2）Prepare attapulgite modified：Natural attapulgite is crushed to 200 mesh, add 6 times of weight deionized water be made it is outstanding
Mud scum starch, then by ultrasound it is fully dispersed after, after taking upper suspension centrifugal treating, vacuum filtration be dried to obtain attapulgite；
The attapulgite obtained after above-mentioned processing is placed in flask, after adding 2mol/ hydrochloric ultrasonic waves 20min, vacuum filtration, deionization
Vacuum drying chamber drying and grinding to 200 mesh obtain attapulgite modified after water cleaning；
（3）According to proportioning by step（1）Obtained graphene oxide compound and step（2）Obtained attapulgite modified and powder
Last activated carbon, vinyltrimethoxy silane, compound microorganism bacterium powder are added in round-bottomed flask, add water to be placed in after stirring
Ultrasonic 40min under Ultrasonic Conditions, vacuum drying chamber is dried after vacuum filtration, and being ground to 200 mesh, to produce graphene oxide compound
The attapulgite modified water purification agent of thing.
Described step（1）In oligomeric 3- aminopropyl triethoxysilanes water is passed through by 3- aminopropyl triethoxysilanes
Solution reaction obtains, and mean molecule quantity is 225, and wherein hydrolysis hydrolysis temperature is 38 DEG C, hydrolysis time 2h.
The step（1）Middle graphene oxide particle diameter is 50nm.
Described step（1）Middle polyacrylamide number-average molecular weight is 2,000,000.
The step（1）The mol ratio of middle graphene oxide and thiocarbamide is 1:0.5.
The step（2）Middle centrifugal rotational speed is 1500r/min, centrifugation time 5min.
The step（2）The mass ratio of middle hydrochloric acid and attapulgite is 1mL:3g.
The step（3）Compound microorganism bacterium powder include saccharomycete and bacillus subtilis.
The step（3）In the ratio of each component is：15 parts of graphene oxide compound, attapulgite modified 30 parts, powder
Last 3 parts of activated carbon, 0.5 part of vinyltrimethoxy silane, 1 part of compound microorganism bacterium powder.
Embodiment 2
A kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound,
Comprise the following steps：
（1）Prepare graphene oxide compound：Oligomeric 3- aminopropyl triethoxysilanes are added into graphene oxide moisture to dissipate
Flocculation sediment is obtained in liquid；Under the catalysis of carbodiimides, above-mentioned flocculation sediment and poly- propionamide are reacted to obtain third
Acrylamide oligomer graphene oxide；Sulphur is added into the aqueous solution of acrylamide oligomers graphene oxide obtained above
Urea, graphene oxide compound is made by water bath Method, washing, which is freeze-dried, to be produced；
（2）Prepare attapulgite modified：Natural attapulgite is crushed to 200 mesh, add 6 times of weight deionized water be made it is outstanding
Mud scum starch, then by ultrasound it is fully dispersed after, after taking upper suspension centrifugal treating, vacuum filtration be dried to obtain attapulgite；
The attapulgite obtained after above-mentioned processing is placed in flask, after adding 2mol/ hydrochloric ultrasonic waves 20min, vacuum filtration, deionization
Vacuum drying chamber drying and grinding to 200 mesh obtain attapulgite modified after water cleaning；
（3）According to proportioning by step（1）Obtained graphene oxide compound and step（2）Obtained attapulgite modified and powder
Last activated carbon, vinyltrimethoxy silane, compound microorganism bacterium powder are added in round-bottomed flask, add water to be placed in after stirring
Ultrasonic 40min under Ultrasonic Conditions, vacuum drying chamber is dried after vacuum filtration, and being ground to 200 mesh, to produce graphene oxide compound
The attapulgite modified water purification agent of thing.
Described step（1）In oligomeric 3- aminopropyl triethoxysilanes water is passed through by 3- aminopropyl triethoxysilanes
Solution reaction obtains, and mean molecule quantity is 20000, and wherein hydrolysis hydrolysis temperature is 48 DEG C, hydrolysis time 6h.
The step（1）Middle graphene oxide particle diameter is 500nm.
Described step（1）Middle polyacrylamide number-average molecular weight is 3,000,000.
The step（1）The mol ratio of middle graphene oxide and thiocarbamide is 1: 5.
The step（2）Middle centrifugal rotational speed is 3000r/min, centrifugation time 8min.
The step（2）The mass ratio of middle hydrochloric acid and attapulgite is 1mL: 5g.
The step（3）Compound microorganism bacterium powder include saccharomycete and bacillus subtilis.
The step（3）In the ratio of each component is：25 parts of graphene oxide compound, attapulgite modified 50 parts, powder
Last 5 parts of activated carbon, 1.5 parts of vinyltrimethoxy silane, 2 parts of compound microorganism bacterium powder.
Embodiment 3
A kind of preparation method of the attapulgite modified water purification agent of graphene oxide compound,
Comprise the following steps：
（1）Prepare graphene oxide compound：Oligomeric 3- aminopropyl triethoxysilanes are added into graphene oxide moisture to dissipate
Flocculation sediment is obtained in liquid；Under the catalysis of carbodiimides, above-mentioned flocculation sediment and poly- propionamide are reacted to obtain third
Acrylamide oligomer graphene oxide；Sulphur is added into the aqueous solution of acrylamide oligomers graphene oxide obtained above
Urea, graphene oxide compound is made by water bath Method, washing, which is freeze-dried, to be produced；
（2）Prepare attapulgite modified：Natural attapulgite is crushed to 150 mesh, add 5 times of weight deionized water be made it is outstanding
Mud scum starch, then by ultrasound it is fully dispersed after, after taking upper suspension centrifugal treating, vacuum filtration be dried to obtain attapulgite；
The attapulgite obtained after above-mentioned processing is placed in flask, after adding 2mol/ hydrochloric ultrasonic waves 15min, vacuum filtration, deionization
Vacuum drying chamber drying and grinding to 150 mesh obtain attapulgite modified after water cleaning；
（3）According to proportioning by step（1）Obtained graphene oxide compound and step（2）Obtained attapulgite modified and powder
Last activated carbon, vinyltrimethoxy silane, compound microorganism bacterium powder are added in round-bottomed flask, add water to be placed in after stirring
Ultrasonic 35min under Ultrasonic Conditions, vacuum drying chamber is dried after vacuum filtration, and being ground to 150 mesh, to produce graphene oxide compound
The attapulgite modified water purification agent of thing.
Described step（1）In oligomeric 3- aminopropyl triethoxysilanes water is passed through by 3- aminopropyl triethoxysilanes
Solution reaction obtains, and mean molecule quantity is 10000, and wherein hydrolysis hydrolysis temperature is 40 DEG C, hydrolysis time 4h.
The step（1）Middle graphene oxide particle diameter is 300nm.
Described step（1）Middle polyacrylamide number-average molecular weight is 2,500,000.
The step（1）The mol ratio of middle graphene oxide and thiocarbamide is 1:3.
The step（2）Middle centrifugal rotational speed is 2000r/min, centrifugation time 6min.
The step（2）The mass ratio of middle hydrochloric acid and attapulgite is 1mL:4g.
The step（3）Compound microorganism bacterium powder include saccharomycete and bacillus subtilis.
The step（3）In the ratio of each component is：20 parts of graphene oxide compound, attapulgite modified 40 parts, powder
Last 4 parts of activated carbon, 1 part of vinyltrimethoxy silane, 1.5 parts of compound microorganism bacterium powder.
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement can also be made, these improvement also should be regarded as the guarantor of the present invention
Protect scope.
Claims (9)
- A kind of 1. preparation method of the attapulgite modified water purification agent of graphene oxide compound, it is characterised in that：Including following step Suddenly：（1）Prepare graphene oxide compound：Oligomeric 3- aminopropyl triethoxysilanes are added into graphene oxide moisture to dissipate Flocculation sediment is obtained in liquid；Under the catalysis of carbodiimides, above-mentioned flocculation sediment and poly- propionamide are reacted to obtain third Acrylamide oligomer graphene oxide；Sulphur is added into the aqueous solution of acrylamide oligomers graphene oxide obtained above Urea, graphene oxide compound is made by water bath Method, washing, which is freeze-dried, to be produced；（2）Prepare attapulgite modified：Natural attapulgite is crushed to 100-200 mesh, adds the deionized water of 4-6 times of weight Be made mud in suspension, then by ultrasound it is fully dispersed after, after taking upper suspension centrifugal treating, vacuum filtration is dried to obtain bumps Rod soil；The attapulgite obtained after above-mentioned processing is placed in flask, after adding 2mol/ hydrochloric ultrasonic waves 10-20min, vacuum is taken out Filter, vacuum drying chamber drying and grinding to 100-200 mesh obtains attapulgite modified after deionized water cleaning；（3）According to proportioning by step（1）Obtained graphene oxide compound and step（2）Obtained attapulgite modified and powder Last activated carbon, vinyltrimethoxy silane, compound microorganism bacterium powder are added in round-bottomed flask, add water to be placed in after stirring Ultrasonic 30-40min under Ultrasonic Conditions, vacuum drying chamber is dried after vacuum filtration, is ground to 100-200 mesh and is produced graphite oxide The attapulgite modified water purification agent of alkene compound.
- 2. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：Described step（1）In oligomeric 3- aminopropyl triethoxysilanes passed through by 3- aminopropyl triethoxysilanes Hydrolysis obtains, and mean molecule quantity is 225-20000, and wherein hydrolysis hydrolysis temperature is 38-48 DEG C, and hydrolysis time is 2-6h。
- 3. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（1）Middle graphene oxide particle diameter is 50-500nm.
- 4. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：Described step（1）Middle polyacrylamide number-average molecular weight is 2,000,000-300 ten thousand.
- 5. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（1）The mol ratio of middle graphene oxide and thiocarbamide is 1:0.5-5.
- 6. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（2）Middle centrifugal rotational speed is 1500-3000r/min, centrifugation time 5-8min.
- 7. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（2）The mass ratio of middle hydrochloric acid and attapulgite is 1mL:3g-5g.
- 8. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（3）Compound microorganism bacterium powder include saccharomycete and bacillus subtilis.
- 9. a kind of preparation method of attapulgite modified water purification agent of graphene oxide compound according to claim 1, its It is characterised by：The step（3）In the ratio of each component is：Graphene oxide compound 15-25 parts, attapulgite modified 30- 50 parts, Powdered Activated Carbon 3-5 parts, vinyltrimethoxy silane 0.5-1.5 parts, compound microorganism bacterium powder 1-2 parts.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108144365A (en) * | 2017-11-28 | 2018-06-12 | 南通强生石墨烯科技有限公司 | A kind of antibiotic property redox graphene modified polypropylene melt-blown water purification catridge |
| CN108408923A (en) * | 2018-04-17 | 2018-08-17 | 合肥金同维低温科技有限公司 | A kind of purifying agent and preparation method thereof |
| CN111718009A (en) * | 2020-06-11 | 2020-09-29 | 中石大蓝天(青岛)石油技术有限公司 | Riverway sewage harmless treatment agent |
| CN112456625A (en) * | 2020-12-15 | 2021-03-09 | 扬州工业职业技术学院 | Industrial wastewater treating agent and preparation method thereof |
| CN112473641A (en) * | 2020-06-11 | 2021-03-12 | 中科远方(北京)科技有限公司 | Graphene oxide COD adsorption fixing agent, preparation method and application thereof |
| CN112892473A (en) * | 2021-01-15 | 2021-06-04 | 神美科技有限公司 | Preparation method of heavy metal removing material |
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| CN106865713A (en) * | 2017-03-16 | 2017-06-20 | 北京柯林沃德科技有限公司 | A kind of graphene-based water purifying flocculating agent and preparation method and application |
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| CN106630196A (en) * | 2017-03-02 | 2017-05-10 | 佛山法式发科技有限公司 | Modified attapulgite water purifying agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144365A (en) * | 2017-11-28 | 2018-06-12 | 南通强生石墨烯科技有限公司 | A kind of antibiotic property redox graphene modified polypropylene melt-blown water purification catridge |
| CN108144365B (en) * | 2017-11-28 | 2020-02-21 | 南通强生石墨烯科技有限公司 | Modified polypropylene of bacterinertness reduced graphene oxide melts and spouts water purification filter core |
| CN108408923A (en) * | 2018-04-17 | 2018-08-17 | 合肥金同维低温科技有限公司 | A kind of purifying agent and preparation method thereof |
| CN111718009A (en) * | 2020-06-11 | 2020-09-29 | 中石大蓝天(青岛)石油技术有限公司 | Riverway sewage harmless treatment agent |
| CN112473641A (en) * | 2020-06-11 | 2021-03-12 | 中科远方(北京)科技有限公司 | Graphene oxide COD adsorption fixing agent, preparation method and application thereof |
| CN112473641B (en) * | 2020-06-11 | 2023-09-01 | 中科远方(北京)科技有限公司 | Graphene oxide COD adsorption fixing agent, preparation method and application thereof |
| CN112456625A (en) * | 2020-12-15 | 2021-03-09 | 扬州工业职业技术学院 | Industrial wastewater treating agent and preparation method thereof |
| CN112456625B (en) * | 2020-12-15 | 2022-08-02 | 扬州工业职业技术学院 | Industrial wastewater treating agent and preparation method thereof |
| CN112892473A (en) * | 2021-01-15 | 2021-06-04 | 神美科技有限公司 | Preparation method of heavy metal removing material |
| CN112892473B (en) * | 2021-01-15 | 2022-08-09 | 神美科技有限公司 | Preparation method of heavy metal removing material |
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