Fenton试剂去除小分子羧酸的分析研究

Analysis of low molecular weight carboxylic acid removal by Fenton

难降解有机污染物对环境有较大影响,在处理过程中次生小分子羧酸也对水环境具有一定的危害,本文考察了Fenton试剂对不同种类小分子羧酸的去除情况,同时对Fe2＋浓度、H2O2浓度和p H值三种因素对体系的影响进行了详细的研究。结果表明,在不同的p H值（2.00~6.00）条件下,Fenton对甲酸、草酸和水杨酸的降解遵循准一级反应动力学。在Fenton体系中,Fe2＋和H2O2存在最佳浓度,此时小分子羧酸的降解达到最大。

Persistent organic pollutants cause urgent environmental issues. The low molecular weight （LMW） carboxylic acids, which are the by-products during the degradation of refractory pollutants do significant harm to water environment. The removal of LMW carboxylic acids by Fenton was studied, and three factors were investigated such as Fe2＋ , H2O2 and pH. Results showed that the decomposition of the LMW carboxylic acids took the first-order kinetic model at different pH values （2. 00 -6. 00）. The opti- mal concentrations of Fe2 ＋ and H2 02 reached the best degradation of the LMW carboxylic acids.