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A method for electrochemical pretreatment of thiram pesticide wastewater

A technology of pesticide wastewater and fumeishuang, which is applied in the field of environmental protection technology and electrochemistry, can solve the problems such as electrochemical oxidation methods that have not yet been seen, and achieve the effects of suitable promotion, simple equipment and simple method.

Active Publication Date: 2017-03-29
JIANGYIN ANCAN ELECTROCHEM EQUIP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, there is no report on electrochemical oxidation method used to treat thiram wastewater

Method used

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  • A method for electrochemical pretreatment of thiram pesticide wastewater
  • A method for electrochemical pretreatment of thiram pesticide wastewater
  • A method for electrochemical pretreatment of thiram pesticide wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using an anode with a molar ratio of Sn:Sb:Ru:Co:Ce of 78:6:8:3:5, adjust the pH value of the residual liquid of Phramex waste water recovery to 6, and then pass the waste water through the inlet valve at a flow rate of 0.05L / min Enter the electrolyzer, adjust the constant current DC power supply so that the current density is 20mA / cm 2 , the water quality before and after treatment is as follows:

[0030]

Embodiment 2

[0032] Using an anode with a molar ratio of Sn:Sb:Ru:Co:Ce of 79:6:8:2:5, adjust the pH value of the residual liquid of Phramex waste water recovery to 6, and then pass the waste water through the inlet valve at a flow rate of 0.1L / min Enter the electrolyzer, adjust the constant current DC power supply so that the current density is 40mA / cm 2 , the water quality before and after treatment is as follows:

[0033]

Embodiment 3

[0035] Using an anode with a molar ratio of Sn:Sb:Ru:Co:Ce of 80:6:8:2:4, adjust the pH value of the residual liquid of Phramex waste water recovery to 6, and then pass the waste water through the inlet valve at a flow rate of 0.2L / min Enter the electrolyzer, adjust the constant current DC power supply so that the current density is 60mA / cm 2 , the water quality before and after treatment is as follows:

[0036]

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Abstract

The invention discloses a method for pretreating thiram pesticide wastewater by using electrochemistry. According to the method, a titanium-based tin-antimony-ruthenium-cobalt-cerium dioxide electrode is prepared through a coating-thermal decomposition method; high-concentration thiram wastewater passes through an electrolytic cell taking the titanium-based tin-antimony-ruthenium-cobalt-cerium dioxide electrode as an anode, and the wastewater is continuously treated for a period of time at a certain current density. The titanium-based tin-antimony-ruthenium-cobalt-cerium dioxide electrode has the advantages of excellent stability, high oxygen evolution potential and high catalytic oxidation capacity. As for high-concentration difficultly-degraded wastewater generated in the production process of pretreating thiram by using titanium-based tin-antimony-ruthenium-cobalt-cerium dioxide electrode, a result indicates that the COD (Chemical Oxygen Demand) removal ratio of the thiram pesticide waste is more than 60% and the BOD (Biological Oxygen Demand) / COD is increased from being less than 0.1 to be more than 0.3 under the conditions of certain pH, current density and treatment time, so that the biodegradability is greatly enhanced. The electrochemical oxidation method which utilizes the titanium-based tin-antimony-ruthenium-cobalt-cerium dioxide electrode is very suitable for the pretreatment of the biochemical degradation of the high-concentration wastewater generated in thiram production.

Description

technical field [0001] The present invention relates to a technical method and equipment, which uses the characteristics of high oxygen evolution potential and strong electrocatalytic oxidation ability of titanium-based tin dioxide, antimony, ruthenium, cobalt and cerium electrodes to electrolyze the high salt produced in the production of thiram High concentration wastewater. It belongs to the field of environmental protection technology and electrochemistry. Background technique [0002] Thiam double (imidacloprid) chemical name: tetramethylthiuram disulfide. The structural formula is [0003] [0004] Thiram is a protective fungicide, and it is a kind of pesticide used for the prevention and control of downy mildew, blight, anthracnose, cereal smut, and seedling yellow blight of various crops. [0005] Thiram is produced by condensation reaction of dimethylamine, carbon disulfide and ammonia water to obtain ammonium dimethyl dithiocarbamate, which is then oxidized b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F101/38C02F103/36
Inventor 陈松高兴旺邵荣
Owner JIANGYIN ANCAN ELECTROCHEM EQUIP
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