| Hydrothermal treatment of arsenic sulfide slag to immobilize arsenic into scorodite and recycle sulfur | |
Zhang, Weifang ; Lu, Hongbo; Liu, Feng; Wang, Chunli; Zhang, Zhihao; Zhang, Jing
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| 2021-03-15 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 406Pages:- |
| Abstract | 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. |
| Department | 环境纳米技术与健康效应重点实验室 |
| Keyword | Arsenic sulfide slag Hydrothermal treatment Scorodite Crystal growth |
| WOS Research Area | Engineering, Environmental ; Environmental Sciences |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/45886 |
| Collection | 环境纳米技术与健康效应重点实验室 |
| Affiliation | 1.Fujian Normal Univ, Coll Environm Sci & Engn, Fuzhou 350007, Peoples R China 2.Fujian Normal Univ, Key Lab Resource Cycle & Pollut Control Fujian Pr, Fuzhou 350007, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 4.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China 5.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100085, Peoples R China |
| Recommended Citation 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):-. |
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| Hydrothermal treatme（4540KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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