Organic pollutant degradation by UV/peroxydisulfate process: Impacts of UV light source and phosphate buffer
文献类型：期刊论文
| 作者 | Lou, Fei; Qiang, Zhimin ; Zou, Xue; Lv, Jinrong; Li, Mengkai
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2022-04 |
| 卷号 | 292期号:0页码:133387 |
| 关键词 | RATE CONSTANTS WATER ASSESSMENT LOW-PRESSURE 254 NM OXIDATION MODEL PHOTODEGRADATION RADIATION HYDROXYL RADICALS |
| ISSN号 | 0045-6535 |
| 英文摘要 | In recent years, ultraviolet (UV) based advanced oxidation processes have been extensively studied for degradation of refractory organic pollutants in water and wastewater, and selection of an appropriate UV light source is an important issue. In this study, bench-scale tests were conducted on a mini-fluidic photoreaction system (MFPS) to determine the degradation kinetics of methylene blue (MB) by UV/peroxydisulfate (UV/PDS) process equipped with a low-pressure UV (LPUV), vacuum UV (VUV)/LPUV, or medium-pressure UV (MPUV) mercury vapor lamp. Results indicate that MB degradation by UV/PDS with various light sources all followed the pseudo first order kinetics, and the photon fluence-based rate constant (k(p,lambda)') had a descending order of: VUV/LPUV/PDS >> MPUV/PDS > LPUV/PDS. Moreover, it is noted that phosphate buffer (PB) notably inhibited MB degradation: the k(p,LPUV)', k(p,VUV/LPUV)' and k(p,MPUV)' decreased by 35.0%, 44.9% and 37.5% with the PB concentration increasing from 0 to 20 mM, respectively. The maximal decrease in k ' p,VUV/LPUV was ascribed to a strong competition of PB for VUV photons. Thereafter, pilot-scale tests were conducted to evaluate the practical performance of UV/PDS in terms of the electrical energy consumption per order (EEO). It was found again that the VUV/LPUV lamp was the optimal light source in UV/PDS for organic pollutant degradation. This study helps optimize the UV/PDS process for its practical application to water and wastewater treatment. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47886]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 通讯作者 | Li, Mengkai |
| 作者单位 | 1.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, Peoples R China 3.Guangxi Univ Nationalities, Sch Chem & Chem Engn, 188 Daxue East Rd, Nanning 530006, Peoples R China 4.North China Univ Technol, Sch Civil Engn, 5 Jinyuanzhuang Rd, Beijing 100144, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lou, Fei,Qiang, Zhimin,Zou, Xue,et al. Organic pollutant degradation by UV/peroxydisulfate process: Impacts of UV light source and phosphate buffer[J]. CHEMOSPHERE,2022,292(0):133387. |
| APA | Lou, Fei,Qiang, Zhimin,Zou, Xue,Lv, Jinrong,&Li, Mengkai.(2022).Organic pollutant degradation by UV/peroxydisulfate process: Impacts of UV light source and phosphate buffer.CHEMOSPHERE,292(0),133387. |
| MLA | Lou, Fei,et al."Organic pollutant degradation by UV/peroxydisulfate process: Impacts of UV light source and phosphate buffer".CHEMOSPHERE 292.0(2022):133387. |
入库方式： OAI收割
来源：生态环境研究中心
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