Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 590, Issue -, Pages 720-728Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.03.032
Keywords
Chlorination; Disinfection by-products (DBPs); Bromine incorporation; Low specific UV absorbance (UVA); Factor
Categories
Funding
- National Natural Science Foundation of China [21107099, 41373141]
- Special Foundation for provincial scientific research institutions by Science and Technology Department of Zhejiang Province [2015F50014]
- Foundation of Science and Technology Bureau of Jinhua [2014-3-030]
- Youth Innovation Foundation of Shenzhen Polytechnic [601622 K24011]
- Guangdong Science and Technology Department [20136030800001]
- Shenzhen Science, Technology and Innovation Commission [JCYJ20140417113430546, JCYJ20140509174140691, JCYJ20140417113430641]
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The main objective of this study was to assess the effects of disinfection conditions on bromine incorporation into disinfection by-products (DBPs) during chlorination of water with low specific UV absorbance (SUVA). Five classes of DBPs were included: trihalomethanes (THMs), dihaloacetic acids (di-HAAs), trihaloacetic adds (tri-HAAs), dihaloacetonitriles (DHANs) and trihalonitromethanes (THNMs). Results showed that the bromine utilization in DBPs formation was positive related with reaction time, pH and temperature. On the other hand, the bromine substitution factors (BSFs) of DBPs were generally increased with pH (except tri-HAAs) and bromide concentration, but decreased with the reaction time, temperature and chlorine dose. Moreover, the BSFs values varied with DBP classes with the ranking being as following: THNMs >> DHANs >> tri-HAAs >> THM >> di-HAAs. These results were mostly similar with the references, yet the pH effect on BSFs as well as the rank of BSFs for different DBP classes may differ with the specific UV absorbance of organic matter. (C) 2017 Elsevier B.V. All rights reserved.
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