PH-dependent photochemical transformation of arsenic sulfide sludge catalyzed by Fe ions under visible light irradiation
文献类型：期刊论文
| 作者 | Lu, Hongbo; Wang, Chunli; Liu, Xueming; Zhang, Jing ; Lin, Zhang; Hao, Zhengping; Pan, Gang
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2021-09-15 |
| 卷号 | 293页码:- |
| 关键词 | Arsenic sulfide sludge As(III) oxidation Photo-catalysis Iron ions |
| ISSN号 | 0926-3373 |
| 英文摘要 | Arsenic sulfide sludge (ASS) is a typical precipitation product of acid smelting wastewater. Previous study reported that when exposed to sunlight, the release and oxidation of As(III) in ASS were markedly accelerated. However, the key factor to trigger the photocatalytic transformation of ASS is still unclear. Herein, we revealed that the coexisting Fe(II)/Fe(III) ions were critical to promote the photo-oxidation of released As(III) under visible light. We further validated that Fe(II)-stimulated photo-oxidation mechanism of As(III) in ASS was pH-dependent. In acid conditions, (OH)-O-center dot and (SO4-)-S-center dot were promoted by Fe(II)/Fe(III) cycling catalysis with the assistance of the reductive sulfur species from ASS, e.g. S2- and SO32-, and thus accelerated the oxidation of As(III). While in neutral conditions, the nascent ferric hydroxide colloids enhanced the oxidation rate of As(III) via photo-induced ligand-to-metal-charge transfer (LMCT) mechanism. These findings help in predicting and controlling the fate of real arsenic-containing sludge in sunlit environments. |
| WOS研究方向 | Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45894]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 100049, Peoples R China 3.Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China 4.Nottingham Trent Univ, Ctr Integrated Water Energy Food Studies iWEF, Sch Anim Rural & Environm Sci, Brackenhurst Camp |
| 推荐引用方式 GB/T 7714 | Lu, Hongbo,Wang, Chunli,Liu, Xueming,et al. PH-dependent photochemical transformation of arsenic sulfide sludge catalyzed by Fe ions under visible light irradiation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2021,293:-. |
| APA | Lu, Hongbo.,Wang, Chunli.,Liu, Xueming.,Zhang, Jing.,Lin, Zhang.,...&Pan, Gang.(2021).PH-dependent photochemical transformation of arsenic sulfide sludge catalyzed by Fe ions under visible light irradiation.APPLIED CATALYSIS B-ENVIRONMENTAL,293,-. |
| MLA | Lu, Hongbo,et al."PH-dependent photochemical transformation of arsenic sulfide sludge catalyzed by Fe ions under visible light irradiation".APPLIED CATALYSIS B-ENVIRONMENTAL 293(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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