PMID- 34543953
OWN - NLM
STAT- MEDLINE
DCOM- 20211105
LR  - 20211105
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 291
DP  - 2021 Dec 15
TI  - Method development and mechanistic study on direct pulsed laser irradiation 
      process for highly effective dechlorination of persistent organic pollutants.
PG  - 118158
LID - S0269-7491(21)01740-1 [pii]
LID - 10.1016/j.envpol.2021.118158 [doi]
AB  - Chlorine-based compounds are typical persistent organic pollutants (POPs) that 
      are widely generated in industrial production. This paper reports an effective 
      and rapid pulsed laser irradiation technique for the dechlorination of 
      hexachlorobenzene (HCB), a model pollutant, without additional catalysts or 
      supports. The effects of the laser parameters, including the laser wavelength and 
      power, on the dechlorination efficiency, were also investigated. The optimized 
      results showed that a lower laser wavelength of 266 nm with 10 mJ/pulse power 
      exhibited the highest dechlorination efficiency with 95% within 15 min. In 
      addition, the laser beam effect was examined by designing the direct-pulsed laser 
      single and multipath irradiation system. The results showed that improving the 
      laser beam profile resulted in more than 95% dechlorination efficiency within 
      5 min. Thus, the dechlorination reaction proceeded much faster as the surface 
      area that the laser beam came in contact with increased due to the multipath 
      system than the single pathway. Gas chromatography identified benzene as the 
      final product of HCB with pentachlorobenzene (PCB), tetrachlorobenzene (TeCB), 
      trichlorobenzene (TCB), dichlorobenzene (DCB), and chlorobenzene (CB) as 
      intermediate products. The mechanism of HCB dechlorination was explained by a 
      comparison of theoretical calculations with the experimental results. The present 
      study reports an advanced technique for the complete dechlorination of 
      chlorobenzenes, which holds great application potential in environmental 
      remediation.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - Yu, Yiseul
AU  - Yu Y
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea.
FAU - Min, Ahreum
AU  - Min A
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea.
FAU - Jung, Hyeon Jin
AU  - Jung HJ
AD  - Electronic Convergence Division, Korea Institute of Ceramic Engineering & 
      Technology, 101, Soho-Ro, Jinju, 52851, Republic of Korea.
FAU - Theerthagiri, Jayaraman
AU  - Theerthagiri J
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea.
FAU - Lee, Seung Jun
AU  - Lee SJ
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea.
FAU - Kwon, Ki-Young
AU  - Kwon KY
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea.
FAU - Choi, Myong Yong
AU  - Choi MY
AD  - Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, 
      Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 
      52828, Republic of Korea. Electronic address: mychoi@gnu.ac.kr.
LA  - eng
PT  - Journal Article
DEP - 20210914
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Chlorobenzenes)
RN  - 4Z87H0LKUY (Hexachlorobenzene)
SB  - IM
MH  - Biodegradation, Environmental
MH  - Chlorobenzenes
MH  - *Environmental Restoration and Remediation
MH  - Hexachlorobenzene
MH  - Lasers
MH  - *Persistent Organic Pollutants
OTO - NOTNLM
OT  - Dechlorination
OT  - Environmental remediation
OT  - Hexachlorobenzene
OT  - Multipath laser system
OT  - Pulsed laser irradiation
EDAT- 2021/09/21 06:00
MHDA- 2021/11/06 06:00
CRDT- 2021/09/20 20:27
PHST- 2021/07/28 00:00 [received]
PHST- 2021/08/18 00:00 [revised]
PHST- 2021/09/09 00:00 [accepted]
PHST- 2021/09/21 06:00 [pubmed]
PHST- 2021/11/06 06:00 [medline]
PHST- 2021/09/20 20:27 [entrez]
AID - S0269-7491(21)01740-1 [pii]
AID - 10.1016/j.envpol.2021.118158 [doi]
PST - ppublish
SO  - Environ Pollut. 2021 Dec 15;291:118158. doi: 10.1016/j.envpol.2021.118158. Epub 
      2021 Sep 14.