The stability of Fe(III)-As(V) co-precipitate in the presence of ascorbic acid: Effect of pH and Fe/As molar ratio
文献类型：期刊论文
| 作者 | Yuan, Zidan; Zhang, Guoqing; Lin, Jinru; Zeng, Xiangfeng; Ma, Xu; Wang, Xin; Wang, Shaofeng; Jia, Yongfeng |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000456640900075 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 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. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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