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Preparation method and application of composite bentonite for wastewater treatment

A technology of wastewater treatment and bentonite, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of low organic dye adsorption performance, easy agglomeration, and reduced adsorption efficiency. Low price of raw materials, excellent adsorption performance, and rapid removal effect

Inactive Publication Date: 2015-03-25
CHINA WEST NORMAL UNIVERSITY
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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention provides composite bentonite for removing organic dyes in sewage and a preparation method thereof, to overcome the disadvantage of low adsorption performance of organic dyes in sewage in the prior art because bentonite has hydrophilicity , and also overcome the defect that a single graphene material as an adsorbent material is easy to agglomerate and reduce the adsorption efficiency

Method used

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  • Preparation method and application of composite bentonite for wastewater treatment
  • Preparation method and application of composite bentonite for wastewater treatment

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Effect test

Embodiment 1

[0018] Disperse 0.5g of bentonite in 100mL of water and disperse by ultrasonic wave for 30min to obtain uniform suspension A; weigh 0.005g of graphite oxide, disperse it in 100mL of aqueous solution, and ultrasonically strip it for 1h to obtain graphene oxide solution B; The two solutions of B were mixed at room temperature for about 6 hours, then centrifuged, washed, and dried to obtain the composite of bentonite and graphene oxide. The ratio of bentonite MMT to graphene oxide GO is 50:0.5.

Embodiment 2

[0020] Disperse 0.5g of bentonite in 100mL of water and disperse by ultrasonic wave for 30min to obtain uniform suspension A; weigh 0.01g of graphite oxide, disperse it in 100mL of aqueous solution, and ultrasonically strip it for 1h to obtain graphene oxide solution B; The two solutions of B were mixed at room temperature for about 6 hours, then centrifuged, washed, and dried to obtain the composite of bentonite and graphene oxide. The ratio of MMT to GO was 50:1.

Embodiment 3

[0022] Disperse 0.5g of bentonite in 100mL of water and disperse by ultrasonic wave for 30min to obtain uniform suspension A; weigh 0.015g of graphite oxide, disperse it in 100mL of aqueous solution, and ultrasonically strip it for 1h to obtain graphene oxide solution B; The two solutions of B were mixed at room temperature for about 6 hours, then centrifuged, washed, and dried to obtain the composite of bentonite and graphene oxide. The ratio of MMT to GO was 50:1.5.

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Abstract

The invention relates to a wastewater treatment adsorbent, and particularly relates to a preparation method and application of composite bentonite for wastewater treatment. The composite bentonite is prepared from the following raw materials in parts by weight: 50 parts of bentonite and 0.5-2 parts of graphite oxide; the preparation method comprises the following steps: dispersing the bentonite in water by using ultrasonic waves to obtain a uniform bentonite suspension; dispersing the graphite oxide in water, and stripping by using ultrasonic waves to obtain a uniform graphite oxide solution; and mixing the bentonite suspension with the graphite oxide solution, centrifugally dehydrating and washing, and drying to obtain the composite bentonite for wastewater treatment. The composite bentonite for wastewater treatment, disclosed by the invention, is simple in synthesis method, low in production cost, simple to operate when used for removing organic dyes from water, friendly to environment, obviously better than existing natural bentonite in organic dye adsorption and good in industrial application prospect.

Description

technical field [0001] The invention relates to an adsorbent for wastewater treatment, in particular to a preparation method and application method of composite bentonite for wastewater treatment. Background technique [0002] The organic dye treatment methods of printing and dyeing sewage mainly include physical method, chemical method and electrolysis method. Among them, the adsorption decolorization by physical method is the most convenient and effective. At present, the most widely used decolorization adsorbent is activated carbon. However, activated carbon is expensive and difficult to regenerate, which limits its application. Therefore, the development of efficient and cheap adsorbents for the treatment of printing and dyeing wastewater has become a research hotspot. [0003] Bentonite is a widely distributed non-metallic mineral. It is a 2:1 layered hydrous aluminosilicate clay mineral with montmorillonite as the main component. Each crystal layer consists of two l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
CPCB01J20/12B01J20/20B01J2220/42B01J2220/4806C02F1/281C02F1/283C02F2101/308
Inventor 艾伦弘蒋静李丽丽张彩红
Owner CHINA WEST NORMAL UNIVERSITY
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