A graphene-based water-purifying flocculating agent, a preparing method thereof and applications of the flocculating agent

A graphene and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problems of limited removal of heavy metals, poor flocculation effect, slow reaction speed, etc. The effect of flocculation decolorization and COD removal rate is obvious, the sedimentation is fast, and the use method is simple.

Inactive Publication Date: 2017-06-20
北京柯林沃德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a graphene-based rapid water purification flocculant and its preparation method and application. The flocculant of the present invention can solve the problem of slow reaction speed of traditional flocculants in sewage treatment, poor flocculation effect, easy anti-dissolution, and removal of heavy metals. The problem of limited capacity has laid the foundation for the application of graphene in the field of sewage treatment

Method used

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  • A graphene-based water-purifying flocculating agent, a preparing method thereof and applications of the flocculating agent
  • A graphene-based water-purifying flocculating agent, a preparing method thereof and applications of the flocculating agent
  • A graphene-based water-purifying flocculating agent, a preparing method thereof and applications of the flocculating agent

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1, graphene oxide compound

[0068] (1) 3-aminopropyltriethoxysilane was hydrolyzed at 45° C. for 6 hours to obtain oligomeric 3-aminopropyltriethoxysilane with a number average molecular weight of 10000 Da. Add oligomeric 3-aminopropyltriethoxysilane to the aqueous dispersion of graphene oxide (wherein the particle size of graphene oxide can be 40-80nm) to obtain flocculation precipitation, that is, oligomeric 3-aminopropyl triethoxysilane Graphene oxide modified by triethoxysilane;

[0069](2) Under the catalysis of carbodiimide, the graphene oxide modified by oligomeric 3-aminopropyltriethoxysilane reacts with polyacrylamide (the number average molecular weight is 2 million) to obtain acrylamide oligomer oxidation Graphene;

[0070] (3) Add thiourea to the aqueous solution of acrylamide oligomer graphene oxide, wherein the molar ratio of graphene oxide to thiourea is 1:0.2, and obtain graphene sponge by hydrothermal method, which is graphene oxide compos...

Embodiment 2

[0075] Embodiment 2, preparation and application of flocculant

[0076] Take the following raw materials by weight: 20Kg of anionic polyacrylamide (10 million), 2Kg of graphene oxide composite, 40Kg of polymerized aluminum iron silicate (the mass content of aluminum is 25% in terms of aluminum oxide) 40Kg, 10Kg of aluminum sulfate, anionic cellulose Sodium 20Kg, sodium carbonate 8Kg, after mixing evenly, after ball milling, passing through 200-300 mesh sieves, the rapid water purification flocculant is obtained.

[0077] Take 200mL of river water, set up experimental group 1 and experimental group 2: experimental group 1 adds 200mg of flocculant of this embodiment, experimental group 2 adds 200mg of commercially available flocculant (polyaluminium chloride, five-star brand, Licheng District five-star chemical business department), Stir and mix separately, precipitate until clear, and then detect.

[0078] Among them, the pH value of the treated water in experimental group 1 w...

Embodiment 3

[0080] Embodiment 3, preparation and application of flocculant

[0081] Get the raw materials of following weight: anionic sodium acrylate (8 million) 10Kg, graphene oxide compound 6Kg, polyaluminum ferric sulfate (mass content of aluminum is 25% with aluminum oxide) 45Kg, polyaluminum ferric chloride (the mass content of aluminum is 25%) The content is calculated as alumina (20%) 25Kg, anionic starch 10Kg, calcium oxide 4Kg, after mixing evenly, after ball milling, passing through a 200-300 mesh sieve to obtain a quick water purification flocculant.

[0082] Take 200mL of river water and set up experimental group 1 and experimental group 2: experimental group 1 was added with 200 mg of the flocculant of this example, experimental group 2 was added with 200 mg of commercially available flocculant, stirred and mixed separately, settled until clarified, and then tested.

[0083] Among them, the pH value of the treated water in experimental group 1 was 7.2, the removal rate of CO...

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Abstract

A graphene-based water-purifying flocculating agent, a preparing method thereof and applications of the flocculating agent are disclosed. The flocculating agent comprises an anion polymer, a graphene oxide composite, an amphoteric metal salt polymer, a plant-derived polymer and a pH adjuster. The flocculating agent comprises 1-20 parts by mass of the anion polymer, 2-10 parts by mass of the graphene oxide composite, 10-70 parts by mass of the amphoteric metal salt polymer, 3-25 parts by mass of the plant-derived polymer and 1-10 parts by mass of the pH adjuster. Raw materials of the flocculating agent are wide in source, a preparing process is simple and a using cost is low. The rapid flocculating agent is applied for sewage, especially in rivers and lakes. A using method is simple and convenient. The flocculating agent can rapidly remove heavy metals in water, water bloom and black and odorous phenomena of water bodies, and can improve the water body environment. According to the graphene oxide composite, surface properties and pore structures of graphene sponge can be controlled through controlling the adding amount of thiourea and the dimension of graphene oxide.

Description

technical field [0001] The invention relates to a graphene-based water purification flocculant and a preparation method and application thereof, belonging to the field of wastewater treatment. Background technique [0002] In recent years, with the rapid development of economy and society, a large number of nutrients such as industrial sewage sources, urban living sources and agricultural non-point sources have been discharged into the surface water environment, resulting in serious eutrophication of water bodies and excessive heavy metal content. Nutrient-rich waters proliferate and breed algae, causing blue-green algae to explode and form a layer of blue-green floating foam with a fishy smell on the water surface, which is called a "bloom". Large-scale blue-green algae outbreaks have caused deterioration of water quality, serious damage to the ecological balance of the lake area, and a large decline in the diversity of aquatic organisms, posing a serious threat to the safe...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/52C02F1/5236C02F1/56
Inventor 杜立波
Owner 北京柯林沃德科技有限公司
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