Effect of iron reduction by enolic hydroxyl groups on the stability of scorodite in hydrometallurgical industries and arsenic mobilization

doi:10.1007/s11356-017-0016-0

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	Effect of iron reduction by enolic hydroxyl groups on the stability of scorodite in hydrometallurgical industries and arsenic mobilization
	Yuan, Zidan 1; Wang, Shaofeng 1; Ma, Xu 1; Wang, Xin 1; Zhang, Guoqing 1; Jia, Yongfeng 1,2; Zheng, Wei 3
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2017-12-01
卷号	24 期号:34 页码:26534-26544
关键词	Scorodite Enolic Hydroxyl Groups Iron Reduction Arsenic Mobilization
ISSN号	0944-1344
DOI	10.1007/s11356-017-0016-0
英文摘要	Scorodite (FeAsO4 center dot 2H(2)O) is an important arsenic-bearing solid waste in hydrometallurgical industries, but its stability in reducing environments is not well understood. This study investigated the effect of Fe(III) reduction by enolic hydroxyl groups on the stability of scorodite and arsenic mobilization at various pH values and ascorbic acid/scorodite molar ratios (AH(2)/Sc). The results showed that 47-89% Fe(III) reduction by ascorbic acid caused approximately 10-69% (similar to 37-260 mg L-1) arsenic release and 4.5 -63% (similar to 13-176 mg L-1) Fe(II) release at pH 5-8. The releases of arsenic and Fe(II) increased with increasing AH(2)/Sc, whereas they decreased as pH increased. The results of the solid characterization and chemical analysis indicated that the mixture of poorly crystalline parasymplesite and probably amorphous FeHAsO4 center dot xH(2)O was the new arsenic sink. The high solubility of this ferrous arsenate with the Fe(II)/As(V) molar ratio > 1 was deemed to be a major contributor to the relatively high arsenic release. This work differed from our previous finding that almost all arsenic was retained in the solid phase after similar Fe(III) reduction in scorodite with hydroquinone. Phenolic hydroxyl groups complexed with aqueous Fe(II), unlike enolic hydroxyl groups, was possibly the dominant reason for the formation of different secondary minerals, which strongly influenced arsenic redistribution between aqueous and solid phases.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000417372600032
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/109242]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
通讯作者	Yuan, Zidan; Zheng, Wei
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Peoples R China 2.Shenyang Univ Chem Technol, Inst Environm Protect, Shenyang 110142, Peoples R China 3.Chinese Acad Environm Planning, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Zidan,Wang, Shaofeng,Ma, Xu,et al. Effect of iron reduction by enolic hydroxyl groups on the stability of scorodite in hydrometallurgical industries and arsenic mobilization[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(34):26534-26544.
APA	Yuan, Zidan.,Wang, Shaofeng.,Ma, Xu.,Wang, Xin.,Zhang, Guoqing.,...&Zheng, Wei.(2017).Effect of iron reduction by enolic hydroxyl groups on the stability of scorodite in hydrometallurgical industries and arsenic mobilization.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(34),26534-26544.
MLA	Yuan, Zidan,et al."Effect of iron reduction by enolic hydroxyl groups on the stability of scorodite in hydrometallurgical industries and arsenic mobilization".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.34(2017):26534-26544.