Sulfate radical-based removal of chloride ion from strongly acidic wastewater: Kinetics and mechanism
文献类型：期刊论文
| 作者 | Hu, Xingyun ; Zhu, Feng; Kong, Linghao; Peng, Xianjia
|
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021-05-15 |
| 卷号 | 410页码:- |
| 关键词 | Chloride Strongly acidic wastewater Persulfate Sulfate radical Hydroxyl radical |
| ISSN号 | 0304-3894 |
| 英文摘要 | Specific to strongly acidic wastewater, the traditional lime neutralization produces massive hazardous waste and present serious environmental risks. Thus, the recycling of purified wastewater after the contained contaminants being removed has been proposed. However, among these contaminants, chloride ion (Cl(-I)) is rather difficult to remove. This study proposes a new method to remove Cl(-I) using thermal activated persulfate (PS). Under optimized conditions, above 96% of initial Cl(-I) was removed from the actual wastewater, and the residual Cl(-I) was below 158 mg/L, which satisfies the requirement of Cl(-I) concentration for wastewater recycling. Furthermore, the mechanism was investigated. In the strongly acidic wastewater, the high concentration of H+ prompted the thermal activation process of PS through two pathways. (1) H+ prompted the transformation of S2O82- into HSO4 - and SO4, and then into HSO5 - that was finally transformed into ?OH and ?SO4? at above 70 ?C. (2) H+ prompted the production of ?OH through the transformation of ?SO4? into ?HSO4 and the cleavage of ?HSO4. The key step for Cl(-I) removal was identified as the formation of ?Cl or ?Cl2? from the oxidation of Cl(-I) by ?SO4? and ?OH, and their contribution ratios were estimated to be 67.4% and 32.6%, respectively. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46002]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Natl Engn Lab Ind Wastewater Treatment, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Xingyun,Zhu, Feng,Kong, Linghao,et al. Sulfate radical-based removal of chloride ion from strongly acidic wastewater: Kinetics and mechanism[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,410:-. |
| APA | Hu, Xingyun,Zhu, Feng,Kong, Linghao,&Peng, Xianjia.(2021).Sulfate radical-based removal of chloride ion from strongly acidic wastewater: Kinetics and mechanism.JOURNAL OF HAZARDOUS MATERIALS,410,-. |
| MLA | Hu, Xingyun,et al."Sulfate radical-based removal of chloride ion from strongly acidic wastewater: Kinetics and mechanism".JOURNAL OF HAZARDOUS MATERIALS 410(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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