Degradation of selected pharmaceuticals in aqueous solution with UV and UV/H2O2
文献类型：期刊论文
| 作者 | Yuan, Fang; Hu, Chun; Hu, Xuexiang; Qu, Jiuhui; Yang, Min |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2009-04 |
| 卷号 | 43期号:6页码:1766-1774 |
| 关键词 | Pharmaceuticals Photolysis Hydroxyl radicals Kinetics Byproduct Degradation mechanism |
| 中文摘要 | The degradation of four pharmaceutical compounds (PhACs), ibuprofen (IBU), diphenhydramine (DP), phenazone (PZ), and phenytoin (PHT) was investigated via ultraviolet (UV) photolysis and UV/H2O2 process with a low-pressure (LP) LTV lamp. For each PhAC tested, direct photolysis quantum yields at 254 nm were found to be ranging from 6.32 x 10(-2) to 2.79 x 10(-1) mol E-1 at pH 7. The second-order rate constants of the reaction between the PhACs and (OH)-O-center dot were determined to be from 4.86 x 10(9) to 6.67 x 10(9) M-1 s(-1) by using a competition kinetic model which utilized para-chlorobenzoic acid (pCBA) as a reference compound. The overall effect of (OH)-O-center dot radical scavenging from humic acid (HA) and anions HCO3-, NO3- was measured utilizing R-OH,R-UV method through examining the aqueous photodegradation of pCBA as a probe compound. Moreover, these fundamental direct and indirect photolysis parameters were applied in the model prediction for oxidation rate constants of the PhACs in UV/H2O2 process. It was found that the predicted oxidation rate constants approximated the observed ones. The results indicated that the new R-OH,R-UV probe compound method was applicable for measuring background (OH)-O-center dot radical scavenging effects in water treatment process of UV/H2O2. Furthermore, by GC-MS analysis, most of the intermediates created during the photodegradation of the selected PhACs in UV/H2O2 process were identified. For the photodegradation of PZ, a competition mechanism existed between the direct UV photolysis and the oxidation of (OH)-O-center dot. An appropriate dosage of H2O2 could hinder the occurrence of the direct photolysis. (C) 2009 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000265175400026 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21658]  |
| 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 | Yuan, Fang,Hu, Chun,Hu, Xuexiang,et al. Degradation of selected pharmaceuticals in aqueous solution with UV and UV/H2O2[J]. WATER RESEARCH,2009,43(6):1766-1774. |
| APA | Yuan, Fang,Hu, Chun,Hu, Xuexiang,Qu, Jiuhui,&Yang, Min.(2009).Degradation of selected pharmaceuticals in aqueous solution with UV and UV/H2O2.WATER RESEARCH,43(6),1766-1774. |
| MLA | Yuan, Fang,et al."Degradation of selected pharmaceuticals in aqueous solution with UV and UV/H2O2".WATER RESEARCH 43.6(2009):1766-1774. |
入库方式： OAI收割
来源：生态环境研究中心
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