Hydrothermal treatment of arsenic sulfide slag to immobilize arsenic into scorodite and recycle sulfur
文献类型：期刊论文
| 作者 | Zhang, Weifang ; Lu, Hongbo; Liu, Feng; Wang, Chunli; Zhang, Zhihao; Zhang, Jing
|
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021-03-15 |
| 卷号 | 406页码:- |
| 关键词 | Arsenic sulfide slag Hydrothermal treatment Scorodite Crystal growth |
| ISSN号 | 0304-3894 |
| 英文摘要 | Arsenic sulfide slag (ASS) is typically by-produced from arsenic-containing wastewater treatment. In this work, a novel hydrothermal treatment method with the assistance of Fe(NO3)(3) (HT-Fe(NO3)(3)) was developed to detoxify ASS by transforming arsenic into scorodite and extracting sulfur in one step. After hydrothermal treatment, As (III) in ASS was oxidized and immobilized into the stable scorodite with a high As immobilization efficiency (similar to 99%), and the toxicity leachability of arsenic-containing solid waste significantly reduced from 634.2 to 2.5 mg/L, well below the discharge standard of solid waste. Further study reveals that the nucleation and growth process was fit well by Avrami-Erofeev model and followed Ostwald step rule, which involved the As2S3 dissolution, formation of amorphous ferric arsenate and then crystallization within the amorphous precursor. In this process, sulfur originated from As2S3 played an important role by serving as the heterogeneous nuclei to decrease the barrier for the formation of amorphous ferric arsenate, and facilitated the transformation of as formed scorodite from nano-sheet aggregates to the bulk and dense spherical polymorph, which further increased the stability of the arsenic contained solid product. This study will shed light on the development of new technologies for treatment of industrial solid waste and recycle of useful resources. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45886]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 作者单位 | 1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 3.Fujian Normal Univ, Key Lab Resource Cycle & Pollut Control Fujian Pr, Fuzhou 350007, Peoples R China 4.Fujian Normal Univ, Coll Environm Sci & Engn, Fuzhou 350007, Peoples R China 5.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Weifang,Lu, Hongbo,Liu, Feng,et al. Hydrothermal treatment of arsenic sulfide slag to immobilize arsenic into scorodite and recycle sulfur[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,406:-. |
| APA | Zhang, Weifang,Lu, Hongbo,Liu, Feng,Wang, Chunli,Zhang, Zhihao,&Zhang, Jing.(2021).Hydrothermal treatment of arsenic sulfide slag to immobilize arsenic into scorodite and recycle sulfur.JOURNAL OF HAZARDOUS MATERIALS,406,-. |
| MLA | Zhang, Weifang,et al."Hydrothermal treatment of arsenic sulfide slag to immobilize arsenic into scorodite and recycle sulfur".JOURNAL OF HAZARDOUS MATERIALS 406(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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