摘要
二甲基亚硝胺(NDMA)是强致癌物质亚硝胺中的一种,由于其近年来在水环境中的高检出率引起了人们的广泛关注。综述了NDMA的基本性质、来源、各种不同的分析方法及检测限,并列出了目前主要的去除方法。NDMA广泛存在于各种水体中,但其分析检测和去除尚存在一定难度。传统的检测方法不能满足痕量NDMA的分析;GC—MS—MS和HPLC—MS—MS是目前应用比较广泛的两种分析方法。紫外照射能去除NDMA,但其费用较高,并且无法破坏其前体物的结构,处理后的水再经氯化处理时仍可能形成NDMA。亟需进一步研究有效去除NDMA及其前体物的方法。
N-nitrosodimethylamine （NDMA） is a member of N-nitrosamines, a group of highly potent carcino- gens. NDMA has become a focused health concern due to its increasing occurrence in water and wastewater samples. This paper presents a literature review of NDMA including its physicochemical properties, the sources of its presence, analytical methods and the associated detection limits, and treatment technologies for its destruction and removal. There are many sources for NDMA to appear in water and wastewater samples; however, its detection in and removal from wastewaters are difficult. The conventional analytical method can not meet the detection limit requirement; in corporating the sample pretreatment of solid phase extraction, low NDMA concentration can be determined by gas chromatography with tandem mass spectrometry （GC/MS/MS） or high performance liquid chromatography tandem mass spectrometry （HPLC/MS/MS）. UV irradiation can remove NDMA; however, it is very expensive and that many NDMA precursors are not destroyed. Furthermore, NDMA may be reformed if chlorination is performed after the UV treatment. There is an urgent need to develop cost effective methods for removing NDMA and its precursors from water.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第9期75-80,共6页
Environmental Pollution & Control
基金
国家自然科学基金资助项目--微污染原水氯化消毒副产物NDMA的生成机制与控制方法(No.50708066)
关键词
二甲基亚硝胺
不对称二甲基肼
氯化消毒
污水回用
N-nitrosodimethylamine
unsymmetrical dimethylhydrazine
chlorination disinfection
water reuse
