Arsenic associated with gypsum produced from Fe(III)-As(V) coprecipitation: Implications for the stability of industrial As-bearing waste
文献类型：期刊论文
| 作者 | Wang, Shaofeng1; Zhang, Danni1; Li, Xiaoliang1,2; Zhang, Guoqing1,2; Wang, Ying1,2; Wang, Xin1; Gomez, Mario A.3; Jia, Yongfeng1 |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2018-10-15 |
| 卷号 | 360页码:311-318 |
| 关键词 | As Fe(III)-As(V) coprecipitation Gypsum Leaching characteristics Speciation |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2018.08.017 |
| 英文摘要 | Gypsum is a high-volume by-product of hydrometallurgical arsenic removal using the Fe(III)-As(V) coprecipitation technique. However, the role of gypsum in As fixation during the Fe(III)-As(V) coprecipitation process and the potential risk of As-bearing gypsum are still not well known. In this study, the fixation of As by gypsum was quantitatively investigated as a function of the initial As and H2SO4 concentrations, Fe/As molar ratio, pH, and neutralization mode. Column leaching tests were also performed to evaluate the potential risk of Fe(III)-As(V) coprecipitates. The results showed that the gypsum isolated from Fe(III)-As(V) coprecipitates by ascorbic acid (VC) treatment could fix up to 4.5% of the total As in the system at pH 8 in fixed-pH mode. The gypsum produced in fixed-pH mode contained a significantly higher concentration of As than that produced in acid-alkaline neutralization mode. The column leaching tests showed that a faster leaching rate could enhance the release of As from Fe(III)-As(V) coprecipitates. It seems that the presence of gypsum could prevent the release of As from Fe(III)-As(V) coprecipitates. Linear combination fits of the As and Fe K-edge XANES spectra suggested that As was likely to occur as adsorbed As and yukonite in VC isolated gypsum. |
| 资助项目 | National Natural Science Foundation of China[41530643] ; National Natural Science Foundation of China[41673130] ; National Natural Science Foundation of China[41703133] ; National Natural Science Foundation of China[41473111] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC038] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000446144600034 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://210.72.129.5/handle/321005/123199]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Jia, Yongfeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shenyang Univ Chem Technol, Inst Environm Protect, Shenyang 110142, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shaofeng,Zhang, Danni,Li, Xiaoliang,et al. Arsenic associated with gypsum produced from Fe(III)-As(V) coprecipitation: Implications for the stability of industrial As-bearing waste[J]. JOURNAL OF HAZARDOUS MATERIALS,2018,360:311-318. |
| APA | Wang, Shaofeng.,Zhang, Danni.,Li, Xiaoliang.,Zhang, Guoqing.,Wang, Ying.,...&Jia, Yongfeng.(2018).Arsenic associated with gypsum produced from Fe(III)-As(V) coprecipitation: Implications for the stability of industrial As-bearing waste.JOURNAL OF HAZARDOUS MATERIALS,360,311-318. |
| MLA | Wang, Shaofeng,et al."Arsenic associated with gypsum produced from Fe(III)-As(V) coprecipitation: Implications for the stability of industrial As-bearing waste".JOURNAL OF HAZARDOUS MATERIALS 360(2018):311-318. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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