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Nanometer cobalt-doped titanium dioxide/chitosan composite microspheres for photolyzing organophosphorus pesticide wastewater

A nano-titanium dioxide, titanium dioxide technology, applied in water/sewage treatment, chemical/physical process, light water/sewage treatment, etc., can solve the problems of easy deactivation, easy aggregation of powder materials, pollution, etc. Effect

Inactive Publication Date: 2012-07-18
CHONGQING UNIV OF ARTS & SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to: address the deficiencies of the above-mentioned prior art in the treatment of organic phosphorus pesticide wastewater pollution, this research intends to ensure that the magnetic nano-TiO 2 In the case of the advantages of composite microspheres with chitosan, it overcomes the shortcomings of powdery materials such as easy aggregation, easy inactivation, and difficult recycling and reuse. It is proposed to make microspheres, and use the prepared microspheres to treat organophosphorus pesticide wastewater and improve High processing efficiency, enhanced separation and recovery effect

Method used

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  • Nanometer cobalt-doped titanium dioxide/chitosan composite microspheres for photolyzing organophosphorus pesticide wastewater
  • Nanometer cobalt-doped titanium dioxide/chitosan composite microspheres for photolyzing organophosphorus pesticide wastewater
  • Nanometer cobalt-doped titanium dioxide/chitosan composite microspheres for photolyzing organophosphorus pesticide wastewater

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Embodiment 1

[0027] A kind of preparation of organophosphorus pesticide waste water purification agent, obtain according to the following steps:

[0028] 1. Titanium dioxide doped with cobalt

[0029] In 6g of Ti(SO 4 ) 2 After adding 100mL of distilled water to the solid to form a solution, slowly add 100:1 (the ratio of the amount of substance) of cobalt chloride solid, and form a 0.15 mol L under magnetic stirring. -1 Ti(SO 4 ) 2 Solution, the solution is put into a clean autoclave of 100 mL stainless steel (the inner cup is polytetrafluoroethylene) after standing still for a while. Heating and reacting for 4 h, after the reaction was completed, cut off the power supply to let the oven cool down naturally, and after cooling to room temperature, take out the glass substrate and wash it with deionized water (with BaCl 2 Solution test SO 4 2- existence), washed with absolute ethanol, and dried naturally to obtain cobalt-doped nano-titanium dioxide powder for use.

[0030] 2. Prepar...

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Abstract

The invention relates to an organophosphorus pesticide wastewater cleaning agent. The wastewater cleaning agent is composite microspheres prepared by using nanometer cobalt-doped titanium dioxide as a catalyst and using chitosan as a carrier, wherein the nanometer titanium dioxide is doped with cobalt, then is mixed with the chitosan, is embedded by polyvinyl alcohol and sodium alginate and is prepared into the nanometer cobalt-doped titanium dioxide / chitosan microspheres. According to the cleaning agent, organophosphorus in the water is effectively reduced, and the removal rate of the organophosphorus in source water can reach 75 percent.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to the application field of treating organophosphorus pesticide waste water by using nano-doped cobalt-titanium dioxide / chitosan composite microspheres. Background technique [0002] China is a big country in the production and use of organophosphorus pesticides. In recent years, the annual amount of pesticide wastewater discharged in my country has reached 10 8 m 3 Among them, those that have been treated only account for 7% of the total, and those that meet the standards only account for 1% of the processed volume. Therefore, the research on the effective treatment of refractory organophosphorus pesticide wastewater has very important practical significance, which is conducive to reducing agricultural pollution and protecting the ecological environment we depend on for survival. At present, biochemical methods are mainly used for the treatment of organophosphorus pesticide ...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/28C02F1/56C02F1/58B01J31/38B01J35/08
Inventor 夏红霞朱启红李强
Owner CHONGQING UNIV OF ARTS & SCI
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