PMID- 28199865
OWN - NLM
STAT- MEDLINE
DCOM- 20170505
LR  - 20171130
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 113
DP  - 2017 Apr 15
TI  - Non-photochemical production of singlet oxygen via activation of persulfate by 
      carbon nanotubes.
PG  - 80-88
LID - S0043-1354(17)30091-X [pii]
LID - 10.1016/j.watres.2017.02.016 [doi]
AB  - The reaction between persulfate (PS) and carbon nanotubes (CNTs) for the 
      degradation of 2,4-dichlorophenol (2,4-DCP) was investigated. It was demonstrated 
      that CNTs could efficiently activate PS for the degradation of 2,4-DCP. Results 
      suggested that the neither hydroxyl radical (OH) nor sulfate radical (SO(4)(-)) 
      was produced therein. For the first time, the generation of singlet oxygen 
      ((1)O(2)) was proved by several methods including electron paramagnetic resonance 
      spectrometry (EPR) and liquid chromatography mass spectrometry measurements. 
      Moreover, the generation of the superoxide radical as a precursor of the singlet 
      oxygen was also confirmed by using certain scavengers and EPR measurement, in 
      which the presence of molecular oxygen was not required as a precursor of 
      (1)O(2). The efficient generation of (1)O(2) using the PS/CNTs system without any 
      light irradiation can be employed for the selective oxidation of aqueous organic 
      compounds under neutral conditions with the mineralization and toxicity 
      evaluated. A kinetic model was developed to theoretically evaluate the adsorption 
      and oxidation of 2,4-DCP on the CNTs. Accordingly, a catalytic mechanism was 
      proposed involving the formation of a dioxirane intermediate between PS and CNTs, 
      and the subsequent decomposition of this intermediate into (1)O(2).
CI  - Copyright (c) 2017 Elsevier Ltd. All rights reserved.
FAU - Cheng, Xin
AU  - Cheng X
AD  - College of Architecture and Environment, Sichuan University, Chengdu 610065, 
      China.
FAU - Guo, Hongguang
AU  - Guo H
AD  - College of Architecture and Environment, Sichuan University, Chengdu 610065, 
      China; National Engineering Laboratory for Clean Technology of Leather 
      Manufacture, Sichuan University, Chengdu 610065, China. Electronic address: 
      hgguo@scu.edu.cn.
FAU - Zhang, Yongli
AU  - Zhang Y
AD  - College of Architecture and Environment, Sichuan University, Chengdu 610065, 
      China.
FAU - Wu, Xiao
AU  - Wu X
AD  - College of Historical Culture and Tourism, Sichuan Normal University, Chengdu 
      610068, China.
FAU - Liu, Yang
AU  - Liu Y
AD  - College of Architecture and Environment, Sichuan University, Chengdu 610065, 
      China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20170208
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Nanotubes, Carbon)
RN  - 11062-77-4 (Superoxides)
RN  - 17778-80-2 (Singlet Oxygen)
RN  - 3352-57-6 (Hydroxyl Radical)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Electron Spin Resonance Spectroscopy
MH  - Hydroxyl Radical/chemistry
MH  - Nanotubes, Carbon/*chemistry
MH  - Oxidation-Reduction
MH  - Oxygen/chemistry
MH  - Singlet Oxygen/*chemistry
MH  - Superoxides/chemistry
OTO - NOTNLM
OT  - Carbon nanotubes
OT  - Kinetics
OT  - Non-radical mechanism
OT  - Persulfate
OT  - Singlet oxygen
EDAT- 2017/02/16 06:00
MHDA- 2017/05/06 06:00
CRDT- 2017/02/16 06:00
PHST- 2016/10/17 00:00 [received]
PHST- 2017/01/14 00:00 [revised]
PHST- 2017/02/07 00:00 [accepted]
PHST- 2017/02/16 06:00 [pubmed]
PHST- 2017/05/06 06:00 [medline]
PHST- 2017/02/16 06:00 [entrez]
AID - S0043-1354(17)30091-X [pii]
AID - 10.1016/j.watres.2017.02.016 [doi]
PST - ppublish
SO  - Water Res. 2017 Apr 15;113:80-88. doi: 10.1016/j.watres.2017.02.016. Epub 2017 
      Feb 8.