Efficient activation of ferrate(VI) by colloid manganese dioxide: Comprehensive elucidation of the surface-promoted mechanism
文献类型：期刊论文
| 作者 | Luo, Mengfan; Zhang, Heng; Zhou, Peng ; Xiong, Zhaokun; Huang, Bingkun; Peng, Jiali; Liu, Rui; Liu, Wen; Lai, Bo
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| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2022-05-15 |
| 卷号 | 215期号:0页码:118243 |
| 关键词 | TRANSFORMATION OXIDATION |
| ISSN号 | 0043-1354 |
| 英文摘要 | Current research focuses on introducing additional energy or reducing agents to directly accelerate the formation of Fe(IV) and Fe(V) from ferrate (Fe(VI)), thereby ameliorating the oxidation activity of Fe(VI). Interestingly, this study discovers that colloid manganese dioxide (cMnO(2)) can remarkably promote Fe(VI) to remove various contaminants via a novel surface-promoted pathway. Many lines of evidence suggest that high-valent Fe species are the primary active oxidants in the cMnO2-Fe(VI) system, however, the underlying activation mechanism for the direct reduction of Fe(VI) by cMnO(2) to generate Fe(IV)/Fe(V) is eliminated. Further analysis found that Fe (VI) can combine with the vacancies in cMnO(2) to form precursor complex (cMnO(2)- Fe(VI)*), which possesses a higher oxidation potential than Fe(VI). This makes cMnO2- Fe(VI)* is more vigorous to oxidize pollutants with electron-rich moieties through the electron transfer step than alone Fe(VI), resulting in producing Fe(V) and Fe (IV). The products of Fe(VI) decay (i.e., Fe(II), Fe(III), and H2O2) are revealed to play vital roles in further boosting the formation of Fe(IV) and Fe(V). Most importantly, the catalytic stability of cMnO(2) in complicated waters is superior to popular reductants, suggesting its outstanding application potential. Taken together, this work provides a full-scale insight into the surface-promoted mechanism in Fe(VI) oxidation process, thus providing an efficient and green strategy for Fe(VI) activation. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47522]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 通讯作者 | Lai, Bo |
| 作者单位 | 1.Sichuan Univ, Sino German Ctr Water & Hlth Res, Chengdu 610065, Peoples R China 2.Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China 3.Sichuan Univ, Coll Architecture & Environm, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Mengfan,Zhang, Heng,Zhou, Peng,et al. Efficient activation of ferrate(VI) by colloid manganese dioxide: Comprehensive elucidation of the surface-promoted mechanism[J]. WATER RESEARCH,2022,215(0):118243. |
| APA | Luo, Mengfan.,Zhang, Heng.,Zhou, Peng.,Xiong, Zhaokun.,Huang, Bingkun.,...&Lai, Bo.(2022).Efficient activation of ferrate(VI) by colloid manganese dioxide: Comprehensive elucidation of the surface-promoted mechanism.WATER RESEARCH,215(0),118243. |
| MLA | Luo, Mengfan,et al."Efficient activation of ferrate(VI) by colloid manganese dioxide: Comprehensive elucidation of the surface-promoted mechanism".WATER RESEARCH 215.0(2022):118243. |
入库方式： OAI收割
来源：生态环境研究中心
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