PMID- 31522041
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20191211
LR  - 20191217
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 699
DP  - 2020 Jan 10
TI  - Degradation of 2,4-dichlorophenol by CuO-activated peroxydisulfate: Importance of 
      surface-bound radicals and reaction kinetics.
PG  - 134379
LID - S0048-9697(19)34370-0 [pii]
LID - 10.1016/j.scitotenv.2019.134379 [doi]
AB  - Peroxydisulfate (PDS, S(2)O(8)(2-)) is a promising oxidant for water treatment 
      and contaminated groundwater remediation. It requires activation to generate 
      sulfate radical (SO(4)(-)) and hydroxyl radical (OH) for indirect oxidation of 
      organic pollutants. Recently, efforts were devoted to developing PDS activation 
      systems for direct oxidation of organic pollutants without producing radicals. 
      However, the mechanism was still ambiguous and the kinetics was either not 
      quantified or empirical in nature. In this research, we examined the activation 
      of PDS by CuO for the degradation of 2,4-dichlorophenol (2,4-DCP). Dual-compound 
      control experiments, radical scavenging tests and electron paramagnetic resonance 
      (EPR) studies showed that surface-bound OH generated from the adsorbed PDS was 
      the main reactive species responsible for the degradation of 2,4-DCP. A kinetic 
      model considering the important reaction steps, including the adsorption of PDS 
      onto CuO, activation of adsorbed PDS to form surface-bound SO(4)(-) and then 
      surface-bound OH, and degradation of 2,4-DCP by surface-bound OH, was developed 
      to better elucidate the reaction kinetics. The results suggested that the overall 
      reaction kinetics of 2,4-DCP degradation was regulated by the adsorption of PDS 
      onto CuO and the electron transfer between surface Cu and adsorbed PDS to form 
      surface-bound SO(4)(-). The developed kinetic model could serve as a framework to 
      characterize other persulfate oxidation systems relying on surface-bound 
      radicals.
CI  - Copyright (c) 2019 Elsevier B.V. All rights reserved.
FAU - Cho, Yi-Chin
AU  - Cho YC
AD  - Graduate Institute of Environmental Engineering, National Taiwan University, No. 
      1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
FAU - Lin, Ru-Yi
AU  - Lin RY
AD  - Graduate Institute of Environmental Engineering, National Taiwan University, No. 
      1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
FAU - Lin, Yi-Pin
AU  - Lin YP
AD  - Graduate Institute of Environmental Engineering, National Taiwan University, No. 
      1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; NTU Research Center for Future 
      Earth, National Taiwan University, Taipei, Taiwan. Electronic address: 
      yipinlin@ntu.edu.tw.
LA  - eng
PT  - Journal Article
DEP - 20190909
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - CuO
OT  - OH radical
OT  - Peroxydisulfate
OT  - Surface radical
EDAT- 2019/09/16 06:00
MHDA- 2019/09/16 06:01
CRDT- 2019/09/16 06:00
PHST- 2019/05/29 00:00 [received]
PHST- 2019/09/06 00:00 [revised]
PHST- 2019/09/08 00:00 [accepted]
PHST- 2019/09/16 06:00 [pubmed]
PHST- 2019/09/16 06:01 [medline]
PHST- 2019/09/16 06:00 [entrez]
AID - S0048-9697(19)34370-0 [pii]
AID - 10.1016/j.scitotenv.2019.134379 [doi]
PST - ppublish
SO  - Sci Total Environ. 2020 Jan 10;699:134379. doi: 10.1016/j.scitotenv.2019.134379. 
      Epub 2019 Sep 9.