Effects of Cr(VI)-reducing bacteria on the behaviour of Cr(VI) adsorption by goethite and haematite: speciation and distribution

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

	Effects of Cr(VI)-reducing bacteria on the behaviour of Cr(VI) adsorption by goethite and haematite: speciation and distribution
	Wang, Chunyong; Wu, Rui; Guo, Jianbo; Cui, Yanshan
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2020-10
卷号	20 期号:10 页码:3733-3741
关键词	Goethite Haematite Cr(VI)-reducing bacteria Cr speciation Cr distribution
ISSN号	1439-0108
英文摘要	Propose In the soil environment, the existence of Cr(VI)-reducing microorganisms might affect the adsorption, desorption and reduction of Cr(VI) adsorbed on soil minerals (such as Fe oxides). The behaviour of Cr(VI)-reducing microorganisms might affect the adsorption and reduction of Cr(VI) by soil minerals. Materials and methods Goethite and haematite with saturated adsorbed Cr(VI) were incubated withMicrobacteriumsp. QH-2, a Cr(VI)-reducing bacteria. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) were used to detect the changes in goethite and haematite. X-ray absorption near-edge structure (XANES) was performed to detect the changes in Cr(III) and Cr(VI) on goethite and haematite. Results and discussion Strain QH-2 adhered to the surfaces of goethite and haematite. No morphological changes in goethite and haematite were detected after incubation. No secondary Fe minerals formed. Cr(III) was the dominant species of Cr on goethite and haematite (78.5% for goethite and 96.7% for haematite) after incubation. Furthermore, the reduction rate of Cr(VI) by strain QH-2 in the liquid phase was faster than that of Cr(VI) adsorbed on goethite and haematite. Conclusions The existence of strain QH-2 could promote the adsorption of Cr by goethite and haematite. Strain QH-2 could affect the morphological distribution and transformation of Cr in Fe oxides such as goethite and haematite.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45159]
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	Wang, Chunyong,Wu, Rui,Guo, Jianbo,et al. Effects of Cr(VI)-reducing bacteria on the behaviour of Cr(VI) adsorption by goethite and haematite: speciation and distribution[J]. JOURNAL OF SOILS AND SEDIMENTS,2020,20(10):3733-3741.
APA	Wang, Chunyong,Wu, Rui,Guo, Jianbo,&Cui, Yanshan.(2020).Effects of Cr(VI)-reducing bacteria on the behaviour of Cr(VI) adsorption by goethite and haematite: speciation and distribution.JOURNAL OF SOILS AND SEDIMENTS,20(10),3733-3741.
MLA	Wang, Chunyong,et al."Effects of Cr(VI)-reducing bacteria on the behaviour of Cr(VI) adsorption by goethite and haematite: speciation and distribution".JOURNAL OF SOILS AND SEDIMENTS 20.10(2020):3733-3741.