PMID- 27847148
OWN - NLM
STAT- MEDLINE
DCOM- 20170505
LR  - 20180206
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 108
DP  - 2017 Jan 1
TI  - Sulfamethazine degradation in water by the VUV/UV process: Kinetics, mechanism 
      and antibacterial activity determination based on a mini-fluidic VUV/UV 
      photoreaction system.
PG  - 348-355
LID - S0043-1354(16)30863-6 [pii]
LID - 10.1016/j.watres.2016.11.018 [doi]
AB  - 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 0.369, respectively. The second-order 
      reaction rate constant between hydroxyl radical (HO(*)) and SMN was determined to 
      be 8.9 x 10(9) 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 speciation. 
      In addition, six byproducts were identified and the potential degradation 
      pathways of SMN including hydroxylation and SO(2) 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.
CI  - Copyright A(c) 2016 Elsevier Ltd. All rights reserved.
FAU - Li, Mengkai
AU  - Li M
AD  - Key Laboratory of Drinking Water Science and Technology, Research Center for 
      Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese 
      Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China.
FAU - Wang, Chen
AU  - Wang C
AD  - Key Laboratory of Drinking Water Science and Technology, Research Center for 
      Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese 
      Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China.
FAU - Yau, Miaoling
AU  - Yau M
AD  - Key Laboratory of Drinking Water Science and Technology, Research Center for 
      Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese 
      Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China.
FAU - Bolton, James R
AU  - Bolton JR
AD  - Department of Civil and Environmental Engineering, University of Alberta, 
      Edmonton, AB T6G 2W2, Canada.
FAU - Qiang, Zhimin
AU  - Qiang Z
AD  - Key Laboratory of Drinking Water Science and Technology, Research Center for 
      Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese 
      Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China. Electronic 
      address: qiangz@rcees.ac.cn.
LA  - eng
PT  - Journal Article
DEP - 20161104
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Anti-Bacterial Agents)
RN  - 0 (Water Pollutants, Chemical)
RN  - 059QF0KO0R (Water)
RN  - 48U51W007F (Sulfamethazine)
RN  - BBX060AN9V (Hydrogen Peroxide)
SB  - IM
MH  - Anti-Bacterial Agents
MH  - Hydrogen Peroxide/chemistry
MH  - Kinetics
MH  - Oxidation-Reduction
MH  - Photolysis
MH  - *Sulfamethazine
MH  - Ultraviolet Rays
MH  - Water/*chemistry
MH  - Water Pollutants, Chemical/chemistry
OTO - NOTNLM
OT  - Degradation
OT  - Mini-fluidic VUV/UV photoreaction system (MVPS)
OT  - Quantum yield
OT  - Sulfamethazine
OT  - VUV/UV
EDAT- 2016/11/17 06:00
MHDA- 2017/05/06 06:00
CRDT- 2016/11/17 06:00
PHST- 2016/08/24 00:00 [received]
PHST- 2016/10/31 00:00 [revised]
PHST- 2016/11/03 00:00 [accepted]
PHST- 2016/11/17 06:00 [pubmed]
PHST- 2017/05/06 06:00 [medline]
PHST- 2016/11/17 06:00 [entrez]
AID - S0043-1354(16)30863-6 [pii]
AID - 10.1016/j.watres.2016.11.018 [doi]
PST - ppublish
SO  - Water Res. 2017 Jan 1;108:348-355. doi: 10.1016/j.watres.2016.11.018. Epub 2016 
      Nov 4.