光电芬顿矿化草甘膦有机废水

以有机磷农药-草甘膦为目标污染物，利用光电芬顿方法对其进行降解研究。研究汇总考察了电流强度、初始pH、Fe2+浓度、草甘膦初始浓度、光种类及通入背景气体种类对草甘膦降解效果的影响。实验结果表明：电流强度越大，草甘膦初始浓度越低，草甘膦降解效果越好；草甘膦在pH=2.0~3.0的酸性体系中降解效果最好；Fe2+浓度升高，草甘膦降解效果增强。在电流为0.36 A、初始pH=3.0、Fe2+浓度为1.0 mmol·L-1、通入100 mL·min-1 O2条件下，以365 nm紫外光照射的光电芬顿反应降解初始浓度为84.5 mg·L-1的草甘膦溶液，处理360 min后溶液矿化率可达64.5%。

Mineralization of pesticide glyphosate wastewater by photoelectro-Fenton process

Effects of current density, initial pH, Fe2+ concentration, initial glyphosate concentration, irradiation source, and input gas on GS degradation by the photoelectro-Fenton (PEF) process were discussed. The results showed that better GS degradation was achieved with a higher current density and a lower initial concentration of GS; higher degradation in the PEF system was achieved when the initial pH was 2.0 to 3h.0; degradation of GS was enhanced when the Fe2+ concentration increased. Under the optimum conditions of 0.36 A, pH=3.0, 1.0 mmol·L-1 Fe2+, 100 mL·min-1 O2, when the initial GS concentration was 84.5 mg·L-1, the electro-Fenton along with UVA irradiation process can mineralize GS efficiently, and the TOC removal is up to 64.5% after 360 min of treatment.