Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light
文献类型：期刊论文
| 作者 | Wang, Yuan ; Zhang, Pengyi ; Pan, Gang ; Chen, Hao |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2008-12-15 |
| 卷号 | 160期号:1页码:181-186 |
| 关键词 | Perfluorooctanoic acid Photochemical decomposition Ferric ion 254 nm UV light Persistent organic pollutants (POPs) |
| 英文摘要 | The great enhancement of ferric ion on the photochemical decomposition of environmentally persistent perfluorooctanoic acid (PFOA) under 254 nm UV light was reported. In the presence of 10 mu M ferric ion, 47.3% of initial PFOA (48 mu M) was decomposed and the defluorination ratio reached 15.4% within 4 h reaction time. While the degradation and defluorination ratio greatly increased to 80.2% and 47.8%, respectively,when ferric ion concentration increased to 80 mu M, and the corresponding half-life was shortened to 103 min. Though the decomposition rate was significantly lowered under nitrogen atmosphere, PFOA was efficiently decomposed too. Other metal ions like Cu(2+) and Zn(2+) also slightly improved the photochemical decomposition of PFOA under irradiation of 254nm UV light. Besides fluoride ion, other intermediates during PFOA decomposition including formic acid and five shorter-chain perfluorinated carboxylic acids (PFCAs) with C7, C6, C5, C4 and C3. respectively, were identified and quantified by ICor LC/MS. The mixture of PFOA and ferric ion had strong absorption around 280nm. It is proposed that PFOA coordinates with ferric ion to form a complex, and its excitation by 254 nm UV light leads to the decomposition of PFOA in a stepwise way. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000261255100026 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22014]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Yuan,Zhang, Pengyi,Pan, Gang,et al. Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light[J]. JOURNAL OF HAZARDOUS MATERIALS,2008,160(1):181-186. |
| APA | Wang, Yuan,Zhang, Pengyi,Pan, Gang,&Chen, Hao.(2008).Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light.JOURNAL OF HAZARDOUS MATERIALS,160(1),181-186. |
| MLA | Wang, Yuan,et al."Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light".JOURNAL OF HAZARDOUS MATERIALS 160.1(2008):181-186. |
入库方式： OAI收割
来源：生态环境研究中心
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