Specific H2S Release from Thiosulfate Promoted by UV Irradiation for Removal of Arsenic and Heavy Metals from Strongly Acidic Wastewater
文献类型：期刊论文
| 作者 | Kong, Linghao ; Hu, Xingyun; Peng, Xianjia; Wang, Xianliang
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2020-11-03 |
| 卷号 | 54期号:21页码:14076-14084 |
| ISSN号 | 0013-936X |
| 英文摘要 | The removal of arsenic and heavy metals (HMs) from strongly acidic wastewater by hydrogen sulfide (H2S) is an efficient method. However, traditional sulfuration reagents (Na2S, FeS, CaS, etc.) rapidly release H2S under acidic conditions via spontaneous hydrolysis, leading to serious H2S pollution. Herein, a H2S release process employing thiosulfate as a sulfuration reagent was proposed to eliminate H2S pollution. We found that thiosulfate can release H2S with specificity both in the dark and under ultraviolet (UV) irradiation under acidic conditions. In the absence of arsenic/HMs, H2S is not released because the formed H2S is consumed by a thiosulfate decomposition product, sulfite, or by its photolysis. In the presence of arsenic/HMs, H2S is released because the formed H2S immediately reacts with arsenic/HMs to generate sulfide precipitates rather than being consumed. The efficiency of transforming thiosulfate to H2S under UV irradiation is 2.5-fold the efficiency in the dark, because UV irradiation promotes the transformation of effective sulfur in thiosulfate molecules to form H2S through the transformation of HS. and S2O3.(-) radicals. Moreover, more than 99.9% of arsenic/HMs were removed from strongly acidic wastewater without producing H2S pollution under UV irradiation. This thiosulfate-based H2S-specific release process solves the problem of H2S pollution under acidic conditions. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44996]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Kong, Linghao,Hu, Xingyun,Peng, Xianjia,et al. Specific H2S Release from Thiosulfate Promoted by UV Irradiation for Removal of Arsenic and Heavy Metals from Strongly Acidic Wastewater[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(21):14076-14084. |
| APA | Kong, Linghao,Hu, Xingyun,Peng, Xianjia,&Wang, Xianliang.(2020).Specific H2S Release from Thiosulfate Promoted by UV Irradiation for Removal of Arsenic and Heavy Metals from Strongly Acidic Wastewater.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(21),14076-14084. |
| MLA | Kong, Linghao,et al."Specific H2S Release from Thiosulfate Promoted by UV Irradiation for Removal of Arsenic and Heavy Metals from Strongly Acidic Wastewater".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.21(2020):14076-14084. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。