Chemical characterization and relative toxicity assessment of disinfection byproduct mixtures in a large drinking water supply network

JOURNAL OF HAZARDOUS MATERIALS

卷:359

Article

Postigo, Cristina¹  Emiliano, Pere²  Barcelo, Damia^1,3  Valero, Fernando² 

[1] CSIC, Inst Environm Assessment & Water Res IDAEA, Dept Environm Chem, C Jordi Girona 18-26, Barcelona 08034, Spain

[2] ATLL Concessionaria Generalitat Catalunya SA ATLL, St Marti Erm 30, Barcelona, Spain

[3] Univ Girona, Catalan Inst Water Res ICRA, Emili Grahit 101,Edifici H20,ParcCient & Tecnol, Girona 17003, Spain

关键词: Iodinated disinfection by-products;    Trihalomethanes;    Haloacetic acids;    Chlorination;    Drinking water treatment;   

DOI  :  10.1016/j.jhazmat.2018.07.022

来源: Elsevier

【 摘 要 】

In order to reduce the formation of disinfection by-products (DBPs) during potabilization of water it is necessary to explore the potential of the source water and the applied treatment to generate these chemicals. This is actually more challenging in large drinking water networks that use different source waters to satisfy drinking water demand. In this regard, this work investigated the formation of DBPs in water matrices that are commonly supplied to the city of Barcelona and its metropolitan area. The regulated trihalomethanes and haloacetic acids were the most abundant DBP classes in these waters, followed by haloacetamides and haloacetonitriles or trihalogenated acetaldehydes (THALs). On the contrary, the formation potential of iodo-DBPs was minor. Mixing of drinking water treatment plant finished waters with desalinated water decreased the overall DBP formation potential of the water but resulted in the increased formation of brominated DBPs after long chlorine contact time. The formation of most DBPs was enhanced at high water temperatures (except for Br-THALs) and increasing residence times. Potential cytotoxicity and genotoxicity of the DBP mixtures were mainly attributed to the presence of nitrogen-containing DBPs and HAAs.

【 授权许可】

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