The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio

doi:10.1016/j.chemosphere.2018.11.142

	The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio
	Yuan, Zidan; Zhang, Guoqing; Lin, Jinru; Zeng, Xiangfeng; Ma, Xu; Wang, Xin; Wang, Shaofeng; Jia, Yongfeng
刊名	CHEMOSPHERE
	2019-03-01
卷号	218 页码:670-679
关键词	Fe(I11)-As(V) co-precipitate Ascorbic acid Iron reduction Parasymplesite Humboldtine As mobilization
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2018.11.142
英文摘要	The potential hazards of Fe(III)-As(V) co-precipitate under reducing conditions are incompletely known. This work investigated the effect of Fe(III) reduction by ascorbic acid (AH(2)) on the stability of Fe(III)-As(V) co-precipitate at different pHs and Fe/As molar ratios. The results showed that As (14-98.9%) and Fe (27.9-99.3%) were significantly released into solution by 79.9-97.5% Fe(III) reduction of the co-precipitate (Fe/As molar ratios of 3 and 5) at pH 5-9. More As release was observed with the increase of pH (6-9) or decrease in Fe/As molar ratio (from 5 to 3). This could be attributed by oxalate, the final product of AH(2) decomposition, which strongly competed with As(V) for Fe(II) at higher pH or lower Fe/As molar ratio, inhibiting parasymplesite accumulation and then causing more As mobilization. The stability of Fe(III)-As(V) co-precipitate with AH(2) upon Fe(III) reduction was lower than that in oxic environment. Compared with produced Fe(II,III) (hydr)oxides in the presence of hydroquinone (QH(2)), humboldtine was formed during the long-term reactions of Fe(III)-As(V) co-precipitate with AH(2). The findings of this study implied that parasymplesite and humboldtine as secondary solid products were environmental relevant and mainly responsible for As(V) and Fe(II) immobilization. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	China National Natural Science Foundation[41530643] ; China National Natural Science Foundation[41703133] ; China National Natural Science Foundation[41473111] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC038] ; Nation Key R&D Program of China[2017YFD0801204]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000456640900075
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123901]
专题	中国科学院沈阳应用生态研究所
通讯作者	Wang, Shaofeng; Jia, Yongfeng
作者单位	Chinese Acad Sci, Key Lab Pollut Ecol & Environm Engn, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Zidan,Zhang, Guoqing,Lin, Jinru,et al. The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio[J]. CHEMOSPHERE,2019,218:670-679.
APA	Yuan, Zidan.,Zhang, Guoqing.,Lin, Jinru.,Zeng, Xiangfeng.,Ma, Xu.,...&Jia, Yongfeng.(2019).The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio.CHEMOSPHERE,218,670-679.
MLA	Yuan, Zidan,et al."The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio".CHEMOSPHERE 218(2019):670-679.