A Slow-Release Substrate Stimulates Groundwater Microbial Communities for Long-Term in Situ Cr(VI) Reduction

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	A Slow-Release Substrate Stimulates Groundwater Microbial Communities for Long-Term in Situ Cr(VI) Reduction
	Zhang, Ping; Van Nostrand, Joy D.; He, Zhili; Chakraborty, Romy; Deng, Ye; Curtis, Daniel; Fields, Matthew W.; Hazen, Terry C.; Arkin, Adam P.; Zhou, Jizhong
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2015-11-03
卷号	49 期号:21 页码:12922-12931
英文摘要	Cr(VI) is a widespread environmental contaminant that is highly toxic and soluble. Previous work indicated that a one-time amendment of polylactate hydrogen-release compound (HRC) reduced groundwater Cr(VI) concentrations for >3.5 years at a contaminated aquifer; however, microbial communities responsible for Cr(VI) reduction are poorly understood. In this study, we hypothesized that HRC amendment would significantly change the composition and structure of groundwater microbial communities, and that the abundance of key functional genes involved in HRC degradation and electron acceptor reduction would increase long-term in response to this slowly degrading complex substrate. To test these hypotheses, groundwater microbial communities were monitored after HRC amendment for >1 year using a comprehensive functional gene microarray. The results showed that the overall functional composition and structure of groundwater microbial communities underwent sequential shifts after HRC amendment. Particularly, the abundance of functional genes involved in acetate oxidation, denitrification, dissimilatory nitrate reduction, metal reduction, and sulfate reduction significantly increased. The overall community dynamics was significantly correlated with changes in groundwater concentrations of microbial biomass, acetate, NO3-, Cr(VI), Fe(II) and SO42-. Our results suggest that HRC amendment primarily stimulated key functional processes associated with HRC degradation and reduction of multiple electron acceptors in the aquifer toward long-term Cr(VI) reduction.
WOS研究方向	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000364355300037
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32909]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
推荐引用方式 GB/T 7714	Zhang, Ping,Van Nostrand, Joy D.,He, Zhili,et al. A Slow-Release Substrate Stimulates Groundwater Microbial Communities for Long-Term in Situ Cr(VI) Reduction[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(21):12922-12931.
APA	Zhang, Ping.,Van Nostrand, Joy D..,He, Zhili.,Chakraborty, Romy.,Deng, Ye.,...&Zhou, Jizhong.(2015).A Slow-Release Substrate Stimulates Groundwater Microbial Communities for Long-Term in Situ Cr(VI) Reduction.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(21),12922-12931.
MLA	Zhang, Ping,et al."A Slow-Release Substrate Stimulates Groundwater Microbial Communities for Long-Term in Situ Cr(VI) Reduction".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.21(2015):12922-12931.