Degradation of nitro-based pharmaceuticals by UV photolysis: Kinetics and simultaneous reduction on halonitromethanes formation potential
文献类型：期刊论文
| 作者 | Lian, Junfeng; Dong, Huiyu; Qiang, Zhimin; Qu, Jiuhui |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 119期号:0页码:83-90 |
| 关键词 | Uv Photolysis Nitro-based Pharmaceuticals Kinetics Halonitromethanes Formation Potential |
| 英文摘要 | This study investigated the degradation kinetics and halonitromethanes formation potential (HNMsFP) of two nitro-based pharmaceuticals (i.e., ranitidine (RNTD) and nizatidine (NL1D)) during ultraviolet (UV) photolysis. It was found that the degradation kinetics of RNTD and NZTD exhibited pH-dependent trends, in accordance with their deprotonation equilibria. The neutral species of RNTD and NZTD were more photo-reactive than their corresponding deprotonated species, with their specific fluence-based first order rate constants varying in the range of 5.64-31.90 m(2) E-1. Both the RNTD and NZTD were prone precursors of HNM5 (with molar yields of 5.6 +/- 0.3% and 4.7 +/- 0.4%, respectively at pH 7.0). Acidic and neutral circumstances facilitated the HNM5 formation. The UV photolysis of RNTD and NZTD could reduce their HNMsFP simultaneously. Positive linear relationships between residual RNTD or NZTD concentration and HNMsFP were observed and the denitration during the UV photolysis accounted for the HNMsFP reduction. With the mandatory UV disinfection fluences in China (i.e. 20-80 mJ cm(-2)), the effective abatement of RNTD and NZTD and their HNMsFP could not be fully achieved, highlighting the necessity of increasing UV fluence or developing UV-based advanced oxidation process in future. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39488]  |
| 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 | Lian, Junfeng,Dong, Huiyu,Qiang, Zhimin,et al. Degradation of nitro-based pharmaceuticals by UV photolysis: Kinetics and simultaneous reduction on halonitromethanes formation potential[J]. WATER RESEARCH,2017,119(0):83-90. |
| APA | Lian, Junfeng,Dong, Huiyu,Qiang, Zhimin,&Qu, Jiuhui.(2017).Degradation of nitro-based pharmaceuticals by UV photolysis: Kinetics and simultaneous reduction on halonitromethanes formation potential.WATER RESEARCH,119(0),83-90. |
| MLA | Lian, Junfeng,et al."Degradation of nitro-based pharmaceuticals by UV photolysis: Kinetics and simultaneous reduction on halonitromethanes formation potential".WATER RESEARCH 119.0(2017):83-90. |
入库方式： OAI收割
来源：生态环境研究中心
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。