Study of photo-assisted electrochemical degradation of carbaryl at dimensionally stable anodes (DSA^®)

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• 作者：G.R.P. Malpass ; D.W. Miwa ; A.C.P. Miwa ; S.A.S. Machado ; A.J. Motheo
• 关键词：Carbaryl ; Electrochemical degradation ; Pesticides ; Photo-assisted electrochemical degradation
• 刊名：Journal of Hazardous Materials
• 出版年：2009
• 出版时间：15 August 2009
• 年：2009
• 卷：167
• 期：1-3
• 页码：224-229
• 全文大小：540 K

文摘

This paper presents the results concerning the degradation of the pesticide carbaryl comparing two methods: electrochemical (EC) and photo-assisted electrochemical (PAEC). The experimental variables of applied current density, electrolyte flow-rate and initial carbaryl concentration were investigated. The results demonstrate that the electrochemical degradation of carbaryl was greatly enhanced when simultaneous UV light was applied. The greatest difference between the PAEC and EC method was apparent when lower current densities were applied. The extent of COD removal was much enhanced for the combined method, independent of the applied current density. It should be noted that the complete removal of carbaryl was achieved with out the need to add NaCl to the reaction mixture, avoiding the risk of chlorinated organic species formation.