Improved Electron Efficiency of Zero-Valent Iron towards Cr(VI) Reduction after Sequestering in Al2O3 Microspheres
文献类型：期刊论文
| 作者 | Wang, Chuan1; Wang, Sha2,3 ; Song, Cheng2,3; Liu, Hong2,3; Yang, Jingxin1
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| 刊名 | INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 19期号:14页码:10 |
| 关键词 | electron efficiency zero-valent iron ZVI sequestered Al2O3 composite |
| DOI | 10.3390/ijerph19148367 |
| 通讯作者 | Yang, Jingxin(yangjx@gzhu.edu.cn) |
| 英文摘要 | Zero-valent iron (ZVI) is widely used for groundwater remediation, but suffers from high electron consumption because of its free contact with non-target substrates such as O-2. Here, ZVI-ALOX particles were prepared via in situ NaBH4 aqueous-phase reduction of ferrous ions (Fe2+) preabsorbed into Al2O3 microspheres. The electron efficiency (EE) and long-term performance of the material were improved by sequestering ZVI in the interspace of the Al2O3 microspheres (ZVI-ALOX). During long-term (350 days) continuous flow, Cr(VI) was removed to below the detection limit for over 23 days. Based on the high reactivity of ZVI towards Cr(VI), the EE of ZVI-ALOX was evaluated by measuring its Cr(VI) removal efficiency at neutral pH and comparing it with that of ZVI. The results showed that the EE of ZVI-ALOX during long-term continuous flow could reach 39.1%, which was much higher than that of ZVI (8.68%). The long-term continuous flow results also demonstrated that treatment of the influent solution achieved higher EE values than in the batch mode, where the presence of dissolved oxygen reduced EE values. At lower pollutant concentrations, the sequestering of ZVI was beneficial to its performance and long-term utility. In addition, measurement of the acute toxicity of treated column effluent using the indicator organism Photobacterium phosphoreum T-3 showed that ZVI-ALOX could reduce the toxicity of 5 mg/L Cr(VI) solution by similar to 70% in 350 d. The results from this study provide a basis for the development of permeable reactive barriers for groundwater remediation based on sequestered ZVI. |
| 资助项目 | National Natural Science Foundation of China[51978181] ; National Natural Science Foundation of China[42077159] |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000832141500001 |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/15964]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Yang, Jingxin |
| 作者单位 | 1.Guangzhou Univ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chuan,Wang, Sha,Song, Cheng,et al. Improved Electron Efficiency of Zero-Valent Iron towards Cr(VI) Reduction after Sequestering in Al2O3 Microspheres[J]. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2022,19(14):10. |
| APA | Wang, Chuan,Wang, Sha,Song, Cheng,Liu, Hong,&Yang, Jingxin.(2022).Improved Electron Efficiency of Zero-Valent Iron towards Cr(VI) Reduction after Sequestering in Al2O3 Microspheres.INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,19(14),10. |
| MLA | Wang, Chuan,et al."Improved Electron Efficiency of Zero-Valent Iron towards Cr(VI) Reduction after Sequestering in Al2O3 Microspheres".INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 19.14(2022):10. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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