PMID- 32540661
OWN - NLM
STAT- MEDLINE
DCOM- 20200824
LR  - 20200824
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 739
DP  - 2020 Oct 15
TI  - Degradation of 3,3',4,4'-tetrachlorobiphenyl (PCB77) by dielectric barrier 
      discharge (DBD) non-thermal plasma: Degradation mechanism and toxicity 
      evaluation.
PG  - 139926
LID - S0048-9697(20)33446-X [pii]
LID - 10.1016/j.scitotenv.2020.139926 [doi]
AB  - Polychlorinated biphenyls (PCBs) are a kind of persistent organic pollutants 
      (POPs) with stable chemical properties which can be enriched in a biological body 
      for a long time. They are often carelessly released into natural environment and 
      thus constantly posing a potential threat to human health. However, because of 
      lack of effective ways of degrading PCBs, researchers are still striving to 
      explore new approaches to remove them from the environment. In this work, we 
      employed atmospheric-pressure non-thermal dielectric barrier discharge (DBD) 
      plasma to treat 3,3',4,4'-tetrachlorobiphenyl (PCB77) in aqueous solution and 
      investigated the removal efficiency under different DBD conditions using 
      different discharging gases. As a result, we showed that He-DBD had the highest 
      removal efficiency with hydroxyl radical playing the major role in the 
      degradation, while O(2)-DBD also gave rise to relatively high efficiency with 
      ozone making an important contribution. After 2 min of treatments by He-DBD and 
      O(2)-DBD, over 75% of PCB77 was degraded with removal rate of 23.65 mg/L and 
      22.19 mg/L per minute, respectively. Besides, the toxicological evaluation for 
      the DBD treatment was also provided, confirming that the PCB77 degradation 
      products had negligible biotoxicity. This work therefore provides a new effective 
      approach to treatment of persistent organic pollutants (POPs) in the environment.
CI  - Copyright (c) 2020 Elsevier B.V. All rights reserved.
FAU - Huang, Qing
AU  - Huang Q
AD  - CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, 
      Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese 
      Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate 
      School, University of Science and Technology of China, Hefei 230026, China. 
      Electronic address: huangq@ipp.ac.cn.
FAU - Fang, Cao
AU  - Fang C
AD  - CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, 
      Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese 
      Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate 
      School, University of Science and Technology of China, Hefei 230026, China.
LA  - eng
PT  - Journal Article
DEP - 20200603
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Water Pollutants, Chemical)
RN  - 3352-57-6 (Hydroxyl Radical)
RN  - 66H7ZZK23N (Ozone)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
RN  - Y2I6546TMI (3,4,3',4'-tetrachlorobiphenyl)
SB  - IM
MH  - Hydroxyl Radical
MH  - *Ozone
MH  - *Polychlorinated Biphenyls
MH  - Water Pollutants, Chemical/*analysis
OTO - NOTNLM
OT  - Degradation
OT  - Dielectric barrier discharge (DBD)
OT  - Non-thermal plasma (NTP)
OT  - Persistent organic pollutant (POP)
OT  - Polychlorinated biphenyl (PCB)
OT  - Toxicity
COIS- Declaration of competing interest The authors declare no competing financial 
      interest.
EDAT- 2020/06/17 06:00
MHDA- 2020/08/25 06:00
CRDT- 2020/06/17 06:00
PHST- 2020/03/29 00:00 [received]
PHST- 2020/06/01 00:00 [revised]
PHST- 2020/06/01 00:00 [accepted]
PHST- 2020/06/17 06:00 [pubmed]
PHST- 2020/08/25 06:00 [medline]
PHST- 2020/06/17 06:00 [entrez]
AID - S0048-9697(20)33446-X [pii]
AID - 10.1016/j.scitotenv.2020.139926 [doi]
PST - ppublish
SO  - Sci Total Environ. 2020 Oct 15;739:139926. doi: 10.1016/j.scitotenv.2020.139926. 
      Epub 2020 Jun 3.