State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2011 May 15;189(1-2):84-91. doi: 10.1016/j.jhazmat.2011.02.002. Epub 2011 Mar 5.
Pretilachlor used as one kind of acetanilide herbicides is potentially dangerous and biorefractory. In this work, electrochemical degradation of lab-synthetic pretilachlor wastewater was carried out with Sb doped Ti/SnO(2) electrode as anode and stainless steel as cathode. The effect of current density on pretilachlor degradation was investigated, and the degradation pathway of pretilachlor was inferred by analyzing its main degradation intermediates. The results showed that the removal of pretilachlor and TOC in treatment time of 60 min were 98.8% and 43.1% under the conditions of current density of 20 mA cm(-2), initial concentration of pretilachlor of 60 mg L(-1), Na(2)SO(4) dosage of 0.1 mol L(-1), pH of 7.2, respectively, while the energy consumption was 15.8 kWhm(-3). The main reactions for electrochemical degradation of pretilachlor included hydroxylation, oxidation, dechlorination, C-O bond and C-N bond cleavage, resulting in the formation of nine main intermediates.
丙草胺作为一种乙酰胺类除草剂具有潜在的危险和生物难降解性。本工作采用 Sb 掺杂的 Ti/SnO2 电极作为阳极，不锈钢作为阴极，对实验室合成的丙草胺废水进行电化学降解。考察了电流密度对丙草胺降解的影响，并通过分析主要降解中间产物推断了丙草胺的降解途径。结果表明，在电流密度为 20 mA cm-2、丙草胺初始浓度为 60 mg L-1、Na2SO4 用量为 0.1 mol L-1、pH 值为 7.2 的条件下，处理 60 min 后，丙草胺的去除率和总有机碳（TOC）去除率分别达到 98.8%和 43.1%，能耗为 15.8 kWh m-3。电化学降解丙草胺的主要反应包括羟化、氧化、脱氯、C-O 键和 C-N 键断裂，生成了 9 种主要的中间产物。
