Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism and antibacterial activity determination based on a mini-fluidic VUV/UV photoreaction system

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism and antibacterial activity determination based on a mini-fluidic VUV/UV photoreaction system
	Wang, Chen; Li, Mengkai; Yau, Miaoling; Bolton, James R.; Qiang, Zhimin
刊名	WATER RESEARCH
	2017
卷号	108 期号:0 页码:348-355
关键词	Mini-fluidic Vuv/uv Photoreaction System (Mvps) Vuv/uv Sulfamethazine Degradation Quantum Yield
英文摘要	A mini-fluidic VUV/UV photoreaction system (MVPS) was developed in our previous study, and it was demonstrated as a powerful tool for studies on pollutant degradation by the VUV/UV process. In this study, we investigated the VUV/UV photodegradation of sulfamethazine (SMN), one of the most frequently detected antibiotics in the environment. The determination methods of photochemical kinetic parameters (e.g., photon fluence-based rate constant and quantum yield) were developed based on the MVPS. The photon fluence-based reaction rate constants for SMN degradation by UV alone and VUV/UV processes were determined as 0.07 x 10(3) and 4.11 x 10(3) m(2) einstein(-1), respectively, while their quantum yields were calculated as 0.019 and 0369, respectively. The second-order reaction rate constant between hydroxyl radical (HO center dot) and SMN was determined to be 8.9 x 109 M-1 s(-1) in VUV/UV irradiation experiments, which were conducted without addition of any other chemical. The pH effect on the SMN degradation by the VUV/UV process arose principally from SMN and HO center dot speciation. In addition, six byproducts were identified and the potential degradation pathways of SMN including hydroxylation and SO2 elimination were proposed. The antibacterial activity of the SMN solution, assessed by the growth inhibition tests of Escherichia coli, decreased by about 80% after VUV/UV treatment up to a photon fluence of 3.58 x 10(-3) einstein m(-2). This study has developed methods for the determination of photochemical kinetic parameters using the newly developed MVPS and has demonstrated that the VUV/UV process is an effective technology to remove sulfonamide antibiotics in water. (C) 2016 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39559]
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	Wang, Chen,Li, Mengkai,Yau, Miaoling,et al. Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism and antibacterial activity determination based on a mini-fluidic VUV/UV photoreaction system[J]. WATER RESEARCH,2017,108(0):348-355.
APA	Wang, Chen,Li, Mengkai,Yau, Miaoling,Bolton, James R.,&Qiang, Zhimin.(2017).Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism and antibacterial activity determination based on a mini-fluidic VUV/UV photoreaction system.WATER RESEARCH,108(0),348-355.
MLA	Wang, Chen,et al."Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism and antibacterial activity determination based on a mini-fluidic VUV/UV photoreaction system".WATER RESEARCH 108.0(2017):348-355.