期刊
CHEMOSPHERE
卷 136, 期 -, 页码 50-55出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2015.03.086
关键词
Volatile aromatic hydrocarbons; Textile dyeing wastewater; Aerobic process; Volatilization
资金
- Key Project of Technology Innovation of the Department of Education of Guangdong Province [2012CXZD0021]
- National Natural Science Foundation of China [51308132]
The occurrence and removal of benzene, toluene, ethylbenzene, xylenes, styrene and isopropylbenzene (BTEXSI) from 6 textile dyeing wastewater treatment plants (TDWTPs) were investigated in this study. The practical capacities of the 6 representative plants, which used the activated sludge process, ranged from 1200 to 26000 m(3) d(-1). The results indicated that BTEXSI were ubiquitous in the raw textile dyeing wastewater, except for isopropylbenzene, and that toluene and xylenes were predominant in raw wastewaters (RWs). TDWTP-E was selected to study the residual BTEXSI at different stages. The total BTEXSI reduction on the aerobic process of TDWTP-E accounted for 82.2% of the entire process. The total BTEXSI concentrations from the final effluents (FEs) were observed to be below 1 mu g L-1, except for TDWTP-F (2.12 mu g L-1). Volatilization and biodegradation rather than sludge sorption contributed significantly to BTEXSI removal in the treatment system. BTEXSI were not found to be the main contaminants in textile dyeing wastewater. (C) 2015 Elsevier Ltd. All rights reserved.
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