Simultaneous photocatalytic Cr(VI) reduction and ciprofloxacin oxidation over TiO2/Fe-omicron composite under aerobic conditions: Performance, durability, pathway and mechanism
文献类型：期刊论文
| 作者 | Diao, ZH; Xu, XR; Jiang, D; Liu, JJ; Kong, LJ; Li, G; Zuo, LZ; Wu, QH |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 315页码:167-176 |
| 关键词 | TiO2 Fe-omicron Ciprofloxacin Cr(VI) Reduction Oxidation |
| 通讯作者 | xuxr@scsio.ac.cn |
| 中文摘要 | Coexistence of organic compounds and heavy metals in aquaculture waters is a widespread problem. In this study, a rapid reduction of Cr(VI) and oxidation of ciprofloxacin (CIP) in a simultaneous manner was firstly reported through the photocatalysis of TiO2/Fe-omicron composite under aerobic conditions. The significantly enhanced removals of Cr(VI) and CIP by TiO2/Fe-omicron composite due to a synergetic effect between oxidation and reduction processes. Within 60 min UV light irradiation, the simultaneous removals of Cr(VI) and CIP by TiO2/Fe-omicron composite were 97.7 and 94.6%, respectively, whereas the corresponding values by TiO2 Were 57.9 and 68.7%. CIP oxidation process could be significantly accelerated under acidic and aerobic conditions. Intriguingly, a low Pb(II) concentration could induce an enhancement of CIP oxidation, whereas a negative effect on both Cr(VI) reduction and CIP oxidation was observed at a relatively high concentration. A low concentration of ethylene diamine tetra-acetic acid (EDTA) did positively affect both Cr(VI) reduction and CIP oxidation processes, whereas a negative effect on CIP oxidation was found at a relatively high concentration. A possible reaction pathway and mechanism between CIP oxidation and Cr(VI) reduction was proposed. CIP was attacked by HO- produced from the decomposition of water and photo-excited holes through substitution and hydroxylation processes, leading to the production of a series of intermediates, whereas the Cr(VI) was converted into Cr(III) through the capture of photo -excited electrons and Fe reduction. (C)2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/16272]  |
| 专题 | 南海海洋研究所_中科院海洋生物资源可持续利用重点实验室 |
| 推荐引用方式 GB/T 7714 | Diao, ZH,Xu, XR,Jiang, D,et al. Simultaneous photocatalytic Cr(VI) reduction and ciprofloxacin oxidation over TiO2/Fe-omicron composite under aerobic conditions: Performance, durability, pathway and mechanism[J]. CHEMICAL ENGINEERING JOURNAL,2017,315:167-176. |
| APA | Diao, ZH.,Xu, XR.,Jiang, D.,Liu, JJ.,Kong, LJ.,...&Wu, QH.(2017).Simultaneous photocatalytic Cr(VI) reduction and ciprofloxacin oxidation over TiO2/Fe-omicron composite under aerobic conditions: Performance, durability, pathway and mechanism.CHEMICAL ENGINEERING JOURNAL,315,167-176. |
| MLA | Diao, ZH,et al."Simultaneous photocatalytic Cr(VI) reduction and ciprofloxacin oxidation over TiO2/Fe-omicron composite under aerobic conditions: Performance, durability, pathway and mechanism".CHEMICAL ENGINEERING JOURNAL 315(2017):167-176. |
入库方式： OAI收割
来源：南海海洋研究所
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