Co-variations of bacterial composition and catabolic genes related to PAH degradation in a produced water treatment system consisting of successive anoxic and aerobic units

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	Co-variations of bacterial composition and catabolic genes related to PAH degradation in a produced water treatment system consisting of successive anoxic and aerobic units
	Zhang, Yu
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2007-02-01
卷号	373 期号:1 页码:356-362
关键词	biodegradation biodiversity catabolic genes produced water wastewater treatment
英文摘要	This paper reports on the investigation of concentration levels of PAHs, community structure, as well as the abundance of PAHrelated catabolic genes including upper-pathway dioxygenase genes (nahAc and phnAc) and down-pathway catechol dioxygenase genes (C120 and C230) in a successive anoxic and aerobic treatment of produced water from the Jidong Oilfield, China. 93% of total PAHs were removed, almost equally contributed by the anoxic and aerobic units. However, PAHs of more than 3 benzene rings remained almost unchanged. The signals for phnAc and C12O were undetectable in this biological system, whereas the existence of nahAc and C23O was confirmed in the system and the copies of the two genes in the aerobic tank were 2 or 3 orders higher than those in the influent water sample. The different behavior of C23O demonstrated that mineralization of PAHs might mainly occur in the aerobic unit. The existence of nahAc and C23O genes in the influent and the high similarity of genotype between the influent and the two sludge samples suggested that bacteria existing in the influent contributed to.PAH removal and bacteria harboring PAH catabolic genes were enriched in the sludge. (c) 2006 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000244326100032
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22544]
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	Zhang, Yu. Co-variations of bacterial composition and catabolic genes related to PAH degradation in a produced water treatment system consisting of successive anoxic and aerobic units[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2007,373(1):356-362.
APA	Zhang, Yu.(2007).Co-variations of bacterial composition and catabolic genes related to PAH degradation in a produced water treatment system consisting of successive anoxic and aerobic units.SCIENCE OF THE TOTAL ENVIRONMENT,373(1),356-362.
MLA	Zhang, Yu."Co-variations of bacterial composition and catabolic genes related to PAH degradation in a produced water treatment system consisting of successive anoxic and aerobic units".SCIENCE OF THE TOTAL ENVIRONMENT 373.1(2007):356-362.