PMID- 29989406
OWN - NLM
STAT- MEDLINE
DCOM- 20190917
LR  - 20190917
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 52
IP  - 15
DP  - 2018 Aug 7
TI  - Reductive Hexachloroethane Degradation by S(2)O(8)(*-) with Thermal Activation of 
      Persulfate under Anaerobic Conditions.
PG  - 8548-8557
LID - 10.1021/acs.est.7b06279 [doi]
AB  - Despite that persulfate radical (S(2)O(8)(*-)) is an important radical species 
      formed from the persulfate (PS) activation process, its reactivity toward 
      contaminant degradation has rarely been explored. In this study, we found that 
      S(2)O(8)(*-) efficiently degrades the contaminant hexachloroethane (HCA) under 
      anaerobic conditions, whereas HCA degradation is negligible in the presence of 
      oxygen. We observed dechlorination products such as pentachloroethane, 
      tetrachloroethylene, and Cl(-) during HCA degradation, which suggest that HCA 
      degradation is mainly a reductive process under anaerobic conditions. Using free 
      radical quenching and electron paramagnetic resonance (EPR) experiments, we 
      confirmed that S(2)O(8)(*-) forms from the reaction between sulfate radical 
      (SO(4)(*-)) and S(2)O(8)(2-), which are the dominant reactive species in HCA 
      degradation. Density functional theory (DFT) calculations were used to elucidate 
      the pathways of HCA degradation and S(2)O(8)(*-) radical decomposition. Further 
      investigation showed that S(2)O(8)(*-) can efficiently degrade HCA and DDTs in 
      soil via reduction during the thermal activation of PS under anaerobic 
      conditions. The finding of this study provide a novel strategy for the reductive 
      degradation of contaminant when PS-based in situ chemical oxidation used in the 
      remediation of soil and groundwater, particularly those contaminated with highly 
      halogenated compounds.
FAU - Zhu, Changyin
AU  - Zhu C
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
AD  - University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of 
      China.
FAU - Zhu, Fengxiao
AU  - Zhu F
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
FAU - Liu, Cun
AU  - Liu C
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
FAU - Chen, Ning
AU  - Chen N
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
AD  - University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of 
      China.
FAU - Zhou, Dongmei
AU  - Zhou D
AUID- ORCID: 0000-0002-7917-7954
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
FAU - Fang, Guodong
AU  - Fang G
AUID- ORCID: 0000-0002-3837-6279
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
FAU - Gao, Juan
AU  - Gao J
AD  - Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil 
      Science , Chinese Academy of Sciences , Nanjing 210008 , People's Republic of 
      China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20180723
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Sulfates)
RN  - 0 (Water Pollutants, Chemical)
RN  - G30K3QQT4J (hexachloroethane)
RN  - L99N5N533T (Ethane)
SB  - IM
MH  - Anaerobiosis
MH  - Ethane/analogs & derivatives
MH  - *Groundwater
MH  - Hydrocarbons, Chlorinated
MH  - Oxidation-Reduction
MH  - Sulfates
MH  - *Water Pollutants, Chemical
EDAT- 2018/07/11 06:00
MHDA- 2019/09/19 06:00
CRDT- 2018/07/11 06:00
PHST- 2018/07/11 06:00 [pubmed]
PHST- 2019/09/19 06:00 [medline]
PHST- 2018/07/11 06:00 [entrez]
AID - 10.1021/acs.est.7b06279 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2018 Aug 7;52(15):8548-8557. doi: 10.1021/acs.est.7b06279. 
      Epub 2018 Jul 23.