期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 532, 期 -, 页码 540-547出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.06.038
关键词
M. aeruginosa; C. meneghiniana; Chlorination; Disinfection by-products; Intracellular organic matter; Extracellular organic matter
资金
- Program for the National Natural Science Foundation of China [51178117]
- Xiamen Natural Science Funds for Distinguished Young Scholar [3502Z20126009]
- Program for New Century Excellent Talents in University [NCET-11-0853]
- Natural Science Foundation of Fujian Province [2015J05102, 2014J01196]
Microcystis aeruginosa (blue-green alga) commonly blooms in summer and Cyclotella meneghiniana (diatom) outbreaks in fall in the reservoirs that serve as drinking water sources in Southeast China. Herein, an evaluation of disinfection by-product formation potential (DBPFP) from them during chlorination should be conducted. Five DBPs including trichloromethane (TCM), trichloronitromethane (TCNM), dichloroacetonitrile (DCAN), 1,1-dichloropropanone (1,1-DCP) and 1,1,1-trichloropropanone (1,1,1-TCP) were monitored. The formation potential of TCM and TCNM was enhanced with the increase of reaction time and chlorine dosage, whereas that of DCAN, 1,1-DCP and 1,1,1-TCP increased first and then fell with continuing reaction time. M. aeruginosa showed higher DBPFP than C. meneghiniana, the yield of DBPs varied with components of algal cells. The DBPFP order from components of M. aeruginosa was cell suspension (CS) approximate to intracellular organic matter (IOM) > extracellular organic matter (EOM) > cell debris (CD), which indicated that IOM was the main DBP precursors for M. aeruginosa. The yields of DBPs from components of C. meneghiniana were in the order of CS > IOM approximate to CD approximate to EOM, suggesting that three components made similar contributions to the total DBP formation. The amount of IOM with higher DBPFP leaked from both algae species increased with the chlorine dosage, indicating that chlorine dosage should be considered carefully in the treatment of eutrophic water for less destroying of the cell integrity. Though fluorescence substances contained in both algae species varied significantly, the soluble microbial products (SMPs) and aromatic protein-like substances were the main cellular components that contributed to DBP formation for both algae. (c) 2015 Elsevier B.V. All rights reserved.
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