Electron efficiency of zero-valent iron for groundwater remediation and wastewater treatment
文献类型：期刊论文
| 作者 | Liu, Hong1,2 ; Wang, Qin2; Wang, Chuan1; Li, Xiang-zhong3
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2013-01-15 |
| 卷号 | 215页码:90-95 |
| 关键词 | Zero-valent iron Groundwater remediation Wastewater treatment Electron efficiency |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2012.11.010 |
| 通讯作者 | Liu, H (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 401122, Peoples R China. |
| 英文摘要 | A rapid zero-valent iron (Fe-0) target reduction reaction in groundwater remediation and wastewater treatment is commonly pursued. However, the economic importance of chemical consumption efficiency was ignored. In this study, we introduced a new economy-based factor of electron efficiency (EE) defined as the percentage of electrons utilized in a target reduction over an entire consumption at a given time interval. A measurement strategy was established and performed in batch experiments using different types of Fe-0 materials and one substrate (Cr-VI or nitrobenzene). Fe-0 materials free of surface oxides were prepared and used for EE measurement. We obtained EE values within half-life times of initial concentration of substrate, which were affected by pH, Fe-0 dosage, coexisting organic material, and Fe-0 type. Then we compared these values with the associated reaction rate constants (k). The results showed that the organic ligands or nano-sized Fe-0 were able to increase both k and EE. Even though lowering the pH or lifting the Fe-0 dosage dramatically accelerated the reactions, no resulting benefits were observed - the EE was even reduced around sevenfold. The results implied that accelerated reaction rates were acquired at the expense of chemical consumption. Thus, the EE factor must be intelligently balanced against the reaction rate to assess Fe-0-based groundwater remediation and wastewater treatment. (C) 2012 Elsevier B.V. All rights reserved. |
| 资助项目 | Natural Science Foundation of China[50978260] ; Natural Science Foundation of China[21077136] ; Fundamental Research Fund of the Central Universities of China |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000316032100013 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/634]  |
| 专题 | 水污染过程与治理研究中心 |
| 通讯作者 | Liu, Hong |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 401122, Peoples R China 2.Sun Yat Sen Univ, Sch Chem & Chem Engn, KLGHEI Environm & Energy Chem, Guangzhou 510275, Guangdong, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Hong Kong, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Hong,Wang, Qin,Wang, Chuan,et al. Electron efficiency of zero-valent iron for groundwater remediation and wastewater treatment[J]. CHEMICAL ENGINEERING JOURNAL,2013,215:90-95. |
| APA | Liu, Hong,Wang, Qin,Wang, Chuan,&Li, Xiang-zhong.(2013).Electron efficiency of zero-valent iron for groundwater remediation and wastewater treatment.CHEMICAL ENGINEERING JOURNAL,215,90-95. |
| MLA | Liu, Hong,et al."Electron efficiency of zero-valent iron for groundwater remediation and wastewater treatment".CHEMICAL ENGINEERING JOURNAL 215(2013):90-95. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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。