Fate of volatile aromatic hydrocarbons in the wastewater from six textile dyeing wastewater treatment plants.
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 μg L(-1), except for TDWTP-F (2.12 μg 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.
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: ningxunan666@126.com.
Xun-An
XA
Ning
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: wangjy1991@yeah.net.
Jing-Yu
JY
Wang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Rui-Jing
RJ
Li
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Wei-Bin
WB
Wen
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Chang-Min
CM
Chen
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Yu-Jie
YJ
Wang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Zuo-Yi
ZY
Yang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Jing-Yong
JY
Liu
D001554:Benzene; D001673:Biodegradation, Environmental; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D007220:Industrial Waste / Q000032:analysis*; D012722:Sewage; D013783:Textile Industry; D013784:Textiles; D014050:Toluene; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014992:Xylenes
D001554:Benzene; D006841:Hydrocarbons, Aromatic; D007220:Industrial Waste; D012722:Sewage; D014050:Toluene; D062065:Wastewater; D014874:Water Pollutants, Chemical; D014992:Xylenes
Aerobic process; Textile dyeing wastewater; Volatile aromatic hydrocarbons; Volatilization