Occurrences and Behaviors of Naphthenic Acids in a Petroleum Refinery Wastewater Treatment Plant

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	Occurrences and Behaviors of Naphthenic Acids in a Petroleum Refinery Wastewater Treatment Plant
	Wang, Beili; Wan, Yi; Gao, Yingxin; Zheng, Guomao; Yang, Min; Wu, Song; Hu, Jianying
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2015-05-05
卷号	49 期号:9 页码:5796-5804
英文摘要	Naphthenic acids (NAs) are one class of compounds in wastewaters from petroleum industries that are known to cause toxic effects, and their removal from oilfield wastewater is an important challenge for remediation of large volumes, of petrochemical effluents. The present study investigated occurrences and behaviors of total NAs and aromatic NAs in a refinery wastewater treatment plant, located in north China, which combined physicochemical and biological processes. Concentrations of total NAs were semiquantified to be 113-392 mu g/L in wastewater from all the treatment units, and the percentages of aromatic NAs in total NAs was estimated to be 2.1-8.8%. The mass reduction for total NAs and aromatic NAs was 15 +/- 16% and 7.5 +/- 24% after the physicochemical treatment, respectively. Great mass reduction (total NAs: 65 +/- 11%, aromatic NAs: 86 +/- 5%) was observed in the biological treatment units, and antiestrogenic activities observed in wastewater from physicochemical treatment units disappeared in the effluent of the activated sludge system. The distributions of mass fractions of NAs demonstrated that biodegradation via activated sludge was the major mechanism for removing alicyclic NAs, aromatic NAs, and related toxicities in the plant, and the polycydic NA congener classes were relatively recalcitrant to biodegradation, which is a complete contrast to the preferential adsorption of NAs with higher cydicity (low Z value). Removal efficiencies of total NM were 73 +/- 17% in summer, which were higher than those in winter (53 +/- 15%), and the seasonal variation was possibly due to the relatively high microbial biotransformation activities in the activated sludge system in summer (indexed by O-3-NAs/NAs). The results of the investigations indicated that biotransformation of NA mixtures by the activated sludge system were largely affected by temperature, and employing an efficient adsorbent together with biodegradation processes would help cost-effectively remove NAs in petroleum effluents.
研究领域[WOS]	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000354155800065
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32811]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, Beili,Wan, Yi,Gao, Yingxin,et al. Occurrences and Behaviors of Naphthenic Acids in a Petroleum Refinery Wastewater Treatment Plant[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(9):5796-5804.
APA	Wang, Beili.,Wan, Yi.,Gao, Yingxin.,Zheng, Guomao.,Yang, Min.,...&Hu, Jianying.(2015).Occurrences and Behaviors of Naphthenic Acids in a Petroleum Refinery Wastewater Treatment Plant.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(9),5796-5804.
MLA	Wang, Beili,et al."Occurrences and Behaviors of Naphthenic Acids in a Petroleum Refinery Wastewater Treatment Plant".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.9(2015):5796-5804.