Systematic study on the reduction efficiency of ascorbic acid and thiourea on selenate and selenite at high and trace concentrations
文献类型：期刊论文
| 作者 | Zhang, Gongli1; Gomez, Mario Alberto1; Yao, Shuhua1; Ma, Xu2; Li, Shifen1; Cao, Xuan1; Zang, Shuyan1; Jia, Yongfeng2 |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2019-04-01 |
| 卷号 | 26期号:10页码:10159-10173 |
| 关键词 | Ascorbic acid Thiourea Selenium Chloride Reduction Acidic ambient conditions |
| ISSN号 | 0944-1344 |
| DOI | 10.1007/s11356-019-04383-z |
| 英文摘要 | Selenate (Se(VI)) and selenite (Se(IV)) are common soluble wastewater pollutants in natural and anthropogenic systems. We evaluated the reduction efficiency and removal of low (0.02 and 2mg/L) and high (20 and 200mg/L) Se(IV)((aq)) and Se(VI)((aq)) concentrations to elemental (Se-0) via the use of ascorbic acid (AA), thiourea (TH), and a 50-50% mixture. The reduction efficiency of AA with Se(IV)((aq)) to nano- and micro-crystalline Se-0 was >= 95%, but <= 5% of Se(VI)((aq)) was reduced to Se(IV)((aq)) with no Se-0. Thiourea was able to reduce <= 75% of Se(IV)((aq)) to bulk Se-0 at lower concentrations but was more effective (>= 90%) at higher concentrations. Reduction of Se(VI)((aq))-> Se (IV)((aq)) with TH was <= 75% at trace concentrations which steadily declined as the concentrations increased, and the products formed were elemental sulfur (S-0) and SnSe8-n phases. The reduction efficiency of Se(IV)((aq)) to bulk Se-0 upon the addition of AA+TH was <= 81% at low concentrations and >= 90% at higher concentrations. An inverse relation to what was observed with Se(IV)((aq)) was found upon the addition of AA+TH with Se(VI)((aq)). At low Se(VI)((aq)) concentrations, AA+TH was able to reduce more effectively (<= 61%) Se(VI)((aq))-> Se(IV)((aq))-> Se-0, while at higher concentrations, it was ineffective (<= 11%) and Se-0, S-0, and SnSe8-n formed. This work helps to guide the removal, reduction effectiveness, and products formed from AA, TH, and a 50-50% mixture on Se(IV)((aq)) and Se(VI)((aq)) to Se-0 under acidic conditions and environmentally relevant concentrations possibly found in acidic natural waters, hydrometallurgical chloride processing operations, and acid mine drainage/acid rock drainage tailings. |
| 资助项目 | National Natural Science Foundation of China[41703129] ; National Key R&D Program of China[2017 YFD 0800301] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000464852200066 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://210.72.129.5/handle/321005/124021]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Gomez, Mario Alberto; Jia, Yongfeng |
| 作者单位 | 1.Shenyang Univ Chem Technol, Inst Environm Protect, Shenyang 110142, Liaoning, Peoples R China 2.Chinese Acad Sci, Key Lab Pollut Ecol & Environm Engn, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Gongli,Gomez, Mario Alberto,Yao, Shuhua,et al. Systematic study on the reduction efficiency of ascorbic acid and thiourea on selenate and selenite at high and trace concentrations[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2019,26(10):10159-10173. |
| APA | Zhang, Gongli.,Gomez, Mario Alberto.,Yao, Shuhua.,Ma, Xu.,Li, Shifen.,...&Jia, Yongfeng.(2019).Systematic study on the reduction efficiency of ascorbic acid and thiourea on selenate and selenite at high and trace concentrations.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,26(10),10159-10173. |
| MLA | Zhang, Gongli,et al."Systematic study on the reduction efficiency of ascorbic acid and thiourea on selenate and selenite at high and trace concentrations".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 26.10(2019):10159-10173. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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