Kinetics and mechanisms of amorphous FeS2 induced Cr(VI) reduction

doi:10.1016/j.jhazmat.2016.08.010

CORC > 北京大学 > 环境科学与工程学院

	Kinetics and mechanisms of amorphous FeS2 induced Cr(VI) reduction
	Li, Yunyi ; Liang, Jialiang ; He, Xiao ; Zhang, Li ; Liu, Yangsheng
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2016
关键词	Hexavalent chromium Amorphous FeS2 Mechanism Kinetics Stoichiometry ORE PROCESSING RESIDUE ZERO-VALENT IRON HEXAVALENT CHROMIUM REDUCTION FRACTURED PYRITE SURFACES X-RAY PHOTOELECTRON IN-SITU REMEDIATION CALCIUM POLYSULFIDE CONTAMINATED SOIL FERROUS SULFATE AQUEOUS-SOLUTIONS
DOI	10.1016/j.jhazmat.2016.08.010
英文摘要	A novel reductant, amorphous FeS2 (FeS2(am)) was synthesized to remove hexavalent chromium (Cr(VI)). The stoichiometry, kinetics and mechanisms of FeS2(am) induced Cr(VI) reduction were studied under anaerobic conditions with a pH range of 5.0-13.0. Results showed that FeS2(am) was efficient in removing aqueous Cr(VI) with a stoichiometry of Cr(VI): FeS2(am) similar to 1: 0.9. Moreover, the reduction kinetics decreased with the growth of pH within the pH range from 5.0 to 10.0, but increased within pH 10.0-13.0. The dissolution kinetics of FeS2(am) was found to be mainly responsible for the varied Cr(VI) reduction kinetics, and the mechanisms involved in the reduction process were further confirmed by X-ray photoelectron spectroscopy analysis. In addition, O-2 was found to compete with Cr(VI) in the reduction process and subsequently impede the Cr(VI) reduction rate. (C) 2016 Elsevier B.V. All rights reserved.; National Nature Science Foundation of China [21077002]; Ministry of Environmental Protection [201009006]; SCI(E); EI; PubMed; ARTICLE; yshliu@pku.edu.cn; 216-225; 320
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/493149]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Li, Yunyi,Liang, Jialiang,He, Xiao,et al. Kinetics and mechanisms of amorphous FeS2 induced Cr(VI) reduction[J]. JOURNAL OF HAZARDOUS MATERIALS,2016.
APA	Li, Yunyi,Liang, Jialiang,He, Xiao,Zhang, Li,&Liu, Yangsheng.(2016).Kinetics and mechanisms of amorphous FeS2 induced Cr(VI) reduction.JOURNAL OF HAZARDOUS MATERIALS.
MLA	Li, Yunyi,et al."Kinetics and mechanisms of amorphous FeS2 induced Cr(VI) reduction".JOURNAL OF HAZARDOUS MATERIALS (2016).