Environmentally friendly technology for treatment of pesticide and ammonia contaminated water with electrochemical plasma

Nguyen Duc Hung, Tran Van Cong, Do Le Thanh Hung, Tran Thi Ngoc Dung
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Abstract

Electrochemical plasma is formed by an electrochemical reaction with a high voltage direct current (DC) in a non-electrolyte solution such as distilled water to create a gaseous state on the electrodes. Under conditions of high voltage, strong electric field and suitable temperature rise due to the Joule-Lenz effect, an electrochemical plasma will appear and be noted by the glow on the electrode as well as the characteristic amperage of the reaction rate leading to a rapid increase in the electrochemical reaction. Plasma reactions produce substances with strong chemical reactivity such as H2, H2O2, or OH* free radicals, etc. in the aquatic environment. Electrochemical plasma formation can be controlled by technological parameters such as voltage, the distance between electrodes, conductivity, and the metallic nature of electrodes, etc. Using electrochemical plasma, it is possible to treat pollutants harmful to the aquatic environment such as 2,4-D; 2,4,5-T, and ammonia. In the process of treating polluted water by electrochemical plasma technology, chemicals and treatment materials are not used, so it is an environmentally friendly technology.
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电化学等离子体处理农药和氨污染水的环保技术
电化学等离子体是通过在非电解质溶液(如蒸馏水)中与高压直流电(DC)发生电化学反应,在电极上形成气态而形成的。在高电压、强电场和焦耳-伦茨效应引起的适当温升条件下,会出现电化学等离子体,电极上的辉光和反应速率的特征安培都能记录到这种等离子体,从而导致电化学反应迅速增加。等离子体反应在水生环境中产生H2、H2O2或OH*自由基等化学反应性较强的物质。电化学等离子体的形成可以通过电压、电极之间的距离、电导率、电极的金属性质等工艺参数来控制。利用电化学等离子体,可以处理对水生环境有害的污染物,如2,4- d;2,4,5- t和氨。电化学等离子体技术在处理污水的过程中,不使用化学药品和处理材料,是一种环保技术。
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