Journal
CHEMOSPHERE
Volume 117, Issue -, Pages 251-255Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.06.083
Keywords
Nitrogenous disinfection by-products; Dissolved organic nitrogen; Haloacetonitriles; Trihalomethanes; Drinking water; Source water
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Funding
- National Natural Science Foundation of China-China [51378366, 51108327]
- National 111 Project of China
- Nonprofit Technology Research Projects of Zhejiang Province, China [2011C23119]
- Foundation of Key Laboratory of Yangtze River Water Environment, Ministry of Education (Tongji University), China [YRWEF201303]
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This study examined the formation of disinfection by-products (DBPs), including nitrogenous DBPs, haloacetonitriles (HANs), and carbonaceous DBPs, trihalomethanes (THMs), upon chlorination of water samples collected from a conventional Chinese surface water treatment plant (i.e. applying coagulation, sedimentation, and filtration). Reductions in the average concentrations (and range, shown in brackets) of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) from 4.8 (3.0-7.3) mu g/L and 0.52 (0.20-0.81) mu g/L in 2010 to 2.4 (1.4-3.7) mu g/L and 0.17 (0.11-0.31) mu g/L in 2012, respectively, led to a decrease in HANs and THMs from 5.3 and 28.5 mu g/L initially to 0.85 and 8.2 mu g/L, as average concentrations, respectively. The bromide concentration in the source water also decreased from 2010 to 2012, but the bromine incorporation factor (BIF) for the THMs did not change significantly; however, for HAN the BIFs increased because the reduction in DON was higher than that of bromide. There was good linear relationship between DOC and THM concentrations, but not between DON and HANs. (C) 2014 Elsevier Ltd. All rights reserved.
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