PMID- 28110150
OWN - NLM
STAT- MEDLINE
DCOM- 20170505
LR  - 20171130
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 112
DP  - 2017 Apr 1
TI  - Enhanced degradation of iopamidol by peroxymonosulfate catalyzed by two pipe 
      corrosion products (CuO and delta-MnO(2)).
PG  - 1-8
LID - S0043-1354(17)30025-8 [pii]
LID - 10.1016/j.watres.2017.01.025 [doi]
AB  - Peroxymonosulfate (PMS) is a promising alternative for drinking water 
      disinfection; also many organic micropollutants may be present in drinking water 
      sources nowadays. However, pipe corrosion products (PCPs) may impact the 
      reactions between a disinfectant and organic micropollutants in water 
      distribution systems. This study investigated iopamidol (IPM) degradation by PMS 
      under catalysis of two PCPs (i.e., CuO and delta-MnO(2)). The pseudo-first-order rate 
      constant of IPM degradation in the CuO/PMS system (CuPS) was 3.7 times of that in 
      the delta-MnO(2)/PMS system (MnPS), with values of 0.218 and 0.059 min(-1), 
      respectively. Sulfate radical (SO(4)(-)) was the major contributor to IPM 
      degradation in the CuPS, while hydroxyl radical (HO) also played an important 
      role in the MnPS. The radical yield ratio was 0.89 and 0.69 mol/mol in the CuPS 
      and MnPS, respectively. The IPM degradation rate increased with increasing PMS 
      dose, and reached a maximum with a PCP dose of 1.0 and 1.5 g L(-1) in the CuPS 
      and MnPS, respectively. The highest degradation efficiency was achieved at pH 7.0 
      in the two systems. The water matrix (i.e., natural organic matter, alkalinity 
      and chloride) had detrimental effects on IPM degradation to different degrees. 
      The majority of the iodine released from IPM was oxidized to iodate (IO(3)(-)) 
      and a small fraction of the initial total organic iodine was transformed to 
      iodoform (CHI(3)). The IPM degradation by PMS mainly proceeded through two 
      pathways: (1) amide hydrolysis of side chain A, amino oxidation, and amide 
      hydrolysis of side chains B and B' in sequence; and (2) deiodination reactions.
CI  - Copyright (c) 2017 Elsevier Ltd. All rights reserved.
FAU - Hu, Jun
AU  - Hu J
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 - Dong, Huiyu
AU  - Dong H
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 - Qu, Jiuhui
AU  - Qu J
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 - 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
PT  - Research Support, Non-U.S. Gov't
DEP - 20170116
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Peroxides)
RN  - 0 (Water Pollutants, Chemical)
RN  - JR13W81H44 (Iopamidol)
SB  - IM
MH  - Catalysis
MH  - Corrosion
MH  - *Iopamidol
MH  - Oxidation-Reduction
MH  - Peroxides/chemistry
MH  - Water Pollutants, Chemical/*chemistry
MH  - Water Purification
OTO - NOTNLM
OT  - Catalysis
OT  - CuO and delta-MnO(2)
OT  - Iopamidol
OT  - Peroxymonosulfate
OT  - Water pipe
EDAT- 2017/01/23 06:00
MHDA- 2017/05/06 06:00
CRDT- 2017/01/23 06:00
PHST- 2016/11/13 00:00 [received]
PHST- 2017/01/13 00:00 [revised]
PHST- 2017/01/14 00:00 [accepted]
PHST- 2017/01/23 06:00 [pubmed]
PHST- 2017/05/06 06:00 [medline]
PHST- 2017/01/23 06:00 [entrez]
AID - S0043-1354(17)30025-8 [pii]
AID - 10.1016/j.watres.2017.01.025 [doi]
PST - ppublish
SO  - Water Res. 2017 Apr 1;112:1-8. doi: 10.1016/j.watres.2017.01.025. Epub 2017 Jan 
      16.