化学
溴氰菊酯
电解
阳极
电化学
钻石
水溶液
化学需氧量
电解质
废水
矿化(土壤科学)
核化学
环境化学
无机化学
电极
杀虫剂
氮气
环境工程
有机化学
物理化学
工程类
生物
农学
作者
M. Errami,R. Salghi,A. Zarrouk,A. Chakir,Salem S. Al-Deyab,B. Hammouti,L. Bazzi,H. Zarrok
出处
期刊:International Journal of Electrochemical Science
[ESG]
日期:2012-01-01
卷期号:7 (5): 4272-4285
被引量:12
标识
DOI:10.1016/s1452-3981(23)19537-x
摘要
Disposal of agricultral wastewater containing enosulfan and deltamethrin by electrochemical methods has been studied in this paper. The degradation of insecticides enosulfan and deltamethrin in aqueous medium of pHi range 5.8-6.2 has been comparatively studied by anodic oxidation using a boron-doped diamond (BDD) anode. A number of experements were run on a laboratory scale and the resulte are reportude here. GC and chemical oxygen demand measurements were conducted to study the reaction kinetics of two insecticides mineralization. The experimental results showed that the electrochemical process was suitable for almost completely removing COD, due to the production of hydroxyl radicals on the diamond surface. In particular, the COD removal follows a pseudo first-order kinetics and the apparent rate constant increased with applied current, while it is almostun affected by concentrations of pesticides and pH. Under optimal experimental conditions of temperature (T=25 °C), supporting electrolyte NaCl (1 g/L) and current density (i.e. 60 mA cm-2), 81% of COD was removed in 2 h electrolysis for deltamethrin, with 11 kWh(kgCOD-1), and 7.6 kWh(kgCOD-1) for endosulfan.
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