Graphene-modified Pd/C cathode and Pd/GAC particles for enhanced electrocatalytic removal of bromate in a continuous three-dimensional electrochemical reactor
文献类型：期刊论文
| 作者 | Mao, Ran; Zhao, Xu; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2015-06-15 |
| 卷号 | 77期号:0页码:1-12 |
| 关键词 | Electrocatalytic reduction Bromate removal Pd-rGO/C electrode Pd-rGO/GAC Three-dimensional electrochemical reactor |
| 英文摘要 | Bromate (BrO3-) is a carcinogenic and genotoxic contaminant commonly generated during ozonation of bromide-containing water. In this work, the reductive removal of BrO3- in a continuous three-dimensional electrochemical reactor with palladium-reduced graphene oxide modified carbon paper (Pd-rGO/C) cathode and Pd-rGO modified granular activated carbon (Pd-rGO/GAC) particles was investigated. The results indicated that the rGO sheets significantly promoted the electrochemical reduction of BrO3-. With the enhanced electron transfer by rGO sheets, the electroreduction of H2O to atomic H* oh the polarized Pd particles could be significantly accelerated, leading to a faster reaction rate of BrO3- with atomic H*. The synergistic effect of the Pd-rGO/C cathode and Pd-rGO/GAC particles were also exhibited. The atomic Ha involved in various electroreduction processes was detected by electron spin resonance spectroscopy and its role for BrO3- reduction was determined. The performance of the reactor was evaluated in terms of the removal of BrO3- and the yield of Br- as a function of the GO concentration, Pd loading amount, current density, hydraulic residence time (HRT), and initial BrO3- concentration. Under the current density of 0.9 mA/cm(2), BrO3- with the initial concentration of 20 mu g/L was reduced to be less than 6.6 mu g/L at the HRT of 20 min. The BrO3- reduction was inhibited in the presence of dissolved organic matter. Although the precipitates generated from Ca2+ and Mg2+ in the tap water would cover the Pd catalysts, a long-lasting electrocatalytic activity could be maintained for the 30 d treatment. SEM and XPS analysis demonstrated that the precipitates were predominantly deposited onto the Pd-rGO/C cathode rather than the Pd-rGO/GAC particles. (c) 2015 Elsevier Ltd. All rights reserved. |
| 研究领域[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:000355040000001 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32784]  |
| 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 | Mao, Ran,Zhao, Xu,Lan, Huachun,et al. Graphene-modified Pd/C cathode and Pd/GAC particles for enhanced electrocatalytic removal of bromate in a continuous three-dimensional electrochemical reactor[J]. WATER RESEARCH,2015,77(0):1-12. |
| APA | Mao, Ran,Zhao, Xu,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2015).Graphene-modified Pd/C cathode and Pd/GAC particles for enhanced electrocatalytic removal of bromate in a continuous three-dimensional electrochemical reactor.WATER RESEARCH,77(0),1-12. |
| MLA | Mao, Ran,et al."Graphene-modified Pd/C cathode and Pd/GAC particles for enhanced electrocatalytic removal of bromate in a continuous three-dimensional electrochemical reactor".WATER RESEARCH 77.0(2015):1-12. |
入库方式： OAI收割
来源：生态环境研究中心
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