高锰酸盐、高铁酸盐和臭氧预氧化处理饮用水

Pre-Oxidation Treatment of Drinking Water with Permanganate, Ferrate and Ozone

对高锰酸盐(PM)、高铁酸盐(Fe(VI))和臭氧(O3)3种氧化剂预处理对饮用水中浊度、溶解性有机碳(DOC)、UV254和溴离子(Br-)、三卤甲烷(THMs)、卤乙酸(HAAs)含量的影响进行了研究。结果表明,3种预氧化均能在一定程度上提高浊度、DOC、UV254、Br-的去除效果。其中O3预氧化取得最好的去除效果,Fe(VI)次之。虽然PM预氧化能在一定程度上提高去除效果,但其去除效果不明显。混凝-沉淀-过滤处理基本不能去除Br-,滤后出水中ρ(Br-)/ρ(DOC)升高导致消毒后溴代THMs和HAAs含量升高。预氧化处理导致Br-含量降低,可以减少溴代THMs和HAAs的比例,同时也能减少总的THMs和HAAs含量。因此预氧化处理可以降低消毒出水中与DBPs相关的毒性。

The effect of pre-oxidation with permanganate(PM),ferrate(Fe(VI))and ozone(O3)on the removal of turbidity,dissolved organic carbon(DOC),UV254,bromide,trihalomethanes(THMs)and haloacetic acids(HAAs)content was investigated.Results showed that three kinds of pre-oxidation could improve the removal of turbidity,DOC,UV254,bromide,THMs and HAAs.Pre-oxidation with O3realized the best performance,followed by Fe(VI)and PM.Although pre-oxidation with PM also promoted the treatment ability to some extent,the removal effect was not obvious.The coagulationsedimentation-filtration(CSF)could not to remove Br-,and theρ(Br-)/ρ(DOC)increased in effluent which led to the increase of brominated disinfection THMs AND HAAs content.Pre-oxidation both reduced the total DBP(i.e.THMs and HAAs)content and the ratios of Br-DBPs to Cl-DBPs.Therefore,pre-oxidation treatment could reduce the total toxicity of effluent associated with DBPs.