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Graphene oxide composite flocculant for sewage treatment and preparation method of graphene oxide composite flocculant for sewage treatment

A graphene composite, sewage treatment technology, applied in water/sewage treatment, water treatment parameter control, adsorbed water/sewage treatment and other directions, can solve problems such as application scope limitation, mutagenic, carcinogenic, etc. The preparation method is simple and the effect of fast adsorption speed

Active Publication Date: 2019-01-04
TSINGHUA UNIV +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flocculants are cheap, but have adverse effects on human health and the ecological environment
Although the amount of organic polymer flocculant is small, the output of scum is small, the flocculation ability is strong, the flocs are easy to separate, and the effect of removing oil and suspended matter is good, but the residual monomer of this type of polymer has "three effects" ( Causative, carcinogenic, mutagenic), the scope of application is limited

Method used

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  • Graphene oxide composite flocculant for sewage treatment and preparation method of graphene oxide composite flocculant for sewage treatment
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  • Graphene oxide composite flocculant for sewage treatment and preparation method of graphene oxide composite flocculant for sewage treatment

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preparation example Construction

[0023] A kind of preparation method of the graphene oxide composite flocculant that is used for sewage treatment provided by the invention, it specifically comprises the following steps:

[0024] 1) Preparation of liquid A: respectively prepare graphene oxide hydrosol with volume concentration of 1-5mg / mL, polyacrylic acid aqueous solution with molar concentration of 0.2-2M and sodium carbonate aqueous solution with molar concentration of 0.1-0.5M, and then prepare Pour the polyacrylic acid aqueous solution into the graphene oxide sol, and stir until the solution is evenly mixed;

[0025] 2) Pour the prepared sodium carbonate aqueous solution into the mixed solution in step 1), stir until the solution is evenly mixed to obtain A solution, and bottle it for later use;

[0026] 3) Prepare a calcium chloride solution with a molar concentration of 0.2-2M to obtain a solution B, which is bottled for use.

Embodiment 1

[0044] (1) Preparation of precursor solution: prepare 100mL of GO hydrosol with a concentration of 1mg / mL; prepare 100mL of polyacrylic acid solution with a concentration of 0.4M; prepare 100mL of sodium carbonate solution with a concentration of 0.1M; prepare 100mL of calcium chloride solution with a concentration of 0.4M; After preparing the solution, ultrasonically disperse for 30 minutes and set aside;

[0045] (2) Preparation of liquid A and liquid B: take 40mL of GO hydrosol, 30mL of polyacrylic acid, and 20mL of sodium carbonate and stir them evenly to prepare liquid A. The volume ratio of graphene oxide hydrosol, polyacrylic acid, and sodium carbonate is 1: 0.75:0.5; take 20mL of calcium carbonate aqueous solution to be liquid B, the volume ratio of liquid A to liquid B is 4.5:1; first pour liquid A into the sewage and stir for 5 minutes, then pour liquid B and stir for 5 minutes, then the Cationic dyes, heavy metal ions, and floating matter are quickly flocculated and...

Embodiment 2

[0047] (1) Preparation of precursor solution: prepare 100mL of GO hydrosol with a concentration of 2mg / mL; prepare 100mL of polyacrylic acid solution with a concentration of 0.5M; prepare 100mL of sodium carbonate solution with a concentration of 0.2M; prepare 100mL of calcium chloride solution with a concentration of 0.5M; After preparing the solution, ultrasonically disperse for 30 minutes and set aside;

[0048] (2) Preparation of liquid A and liquid B: take 40mL of GO hydrosol, 10mL of polyacrylic acid, and 10mL of sodium carbonate and stir them evenly to prepare liquid A. The volume ratio of graphene oxide hydrosol, polyacrylic acid, and sodium carbonate is 1: 0.25:0.25; take 10mL of calcium carbonate as liquid B, the volume ratio of liquid A to liquid B is 6:1; first pour liquid A into the sewage and stir for 5 minutes, then pour liquid B and stir for 5 minutes, the cations in the sewage Dyes, heavy metal ions, and floating matter are quickly flocculated and settled, and...

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Abstract

The invention belongs to the technical field of sewage treatment and discloses a graphene oxide composite flocculant for sewage treatment and a preparation method of the graphene oxide composite flocculant for sewage treatment. The composite flocculant is mainly composed of liquid A and liquid B; the liquid A is formed by mixing graphene oxide hydrosol, polyacrylic acid aqueous solution and sodiumcarbonate aqueous solution according to a certain proportion; the liquid B refers to calcium chloride solution. The preparation method includes: respectively preparing graphene oxide hydrosol, polyacrylic acid aqueous solution and sodium carbonate aqueous solution, well mixing to obtain the liquid A for standby application, and preparing the liquid B for standby application. In use of the composite flocculant, the liquid A is added into waste water and stirred, and then the liquid B is added. The composite flocculant has advantages that due to adding of graphene oxide, the integral adsorptionperformance of the flocculant is remarkably improved, and high adsorption speed and excellent adsorption effects are achieved; the preparation method is simple, economical and applicable, and harmfulsubstances such as cationic dyes, heavy metal ions, particulate pollutants and the like can be effectively adsorbed.

Description

technical field [0001] The invention relates to a composite flocculant for sewage treatment and a preparation method thereof, belonging to the technical field of sewage treatment. Background technique [0002] The rapid development of industry has brought a lot of convenience to the progress of human society. At the same time, the industrial wastewater produced by manufacturing has also caused serious pollution to the global environment. How to remove harmful substances in sewage is an urgent problem to be solved. Industrial wastewater flows directly into channels, rivers and lakes, polluting surface water; if it is highly toxic, it will lead to the death or even extinction of aquatic animals and plants. Industrial wastewater may also seep into groundwater, contaminate groundwater, and in turn contaminate crops. Industrial wastewater seeps into the soil, causing soil pollution, or heavy metal pollution, which affects the growth of plants and microorganisms in the soil. Tox...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F101/30C02F101/20
CPCC02F1/283C02F1/5236C02F1/56C02F2101/20C02F2101/308C02F2209/10
Inventor 林舒媛李启龙李虓郝相龙张丽萍朱宏伟
Owner TSINGHUA UNIV
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