预臭氧化对含氮消毒副产物形成影响的分析与综述

摘要

为了实现对饮用水中含氮消毒副产物(N-DBPs)的控制,探究了臭氧化预处理对N-DBPs生成的影响.以3类典型的N-DBPs,即亚硝胺、卤代硝基甲烷和卤乙腈为研究对象,基于3类典型的N-DBPs的形成机理,整理和分析了臭氧化预处理对氯(胺)消毒处理过程中3类典型N-DBPs形成的影响.研究发现:臭氧化预处理在大部分情况下都可以降低氯(胺)消毒过程中N-DBPs的生成,然而对于一些特殊的水体,可能由于 N-DBPs高生成势前体的存在,臭氧化预处理反而使得 N-DBPs的生成升高了.同时,针对目前臭氧化预处理的研究现状,提出了今后有待进一步研究的问题.%To control nitrogenous disinfection by-products(N-DBPs),the effects of ozonation pretreatment on the generation of N-DBPs were investigated. Three typical types of N-DBPs of nitrosamine,halogenated nitromethane and haloacetonitrile were chosen as research subjects. Based on the formation mechanisms,the effects of pre-ozonation on the formation of N-DBPs during chloramination were reviewed and analyzed. The results indicate that in most cases,ozonation pretreatment can reduce the formation of N-DBPs. However,for some special water sources,the ozonation pretreatment makes the formation of N-DBPs increase mainly due to the existence of high potential precursors of N-DBPs.Based on the present research,some issues needed to be further studied in the future were proposed.