PMID- 33689948
OWN - NLM
STAT- MEDLINE
DCOM- 20210420
LR  - 20210420
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 278
DP  - 2021 Jun 1
TI  - Do dissipation and transformation of gamma-HCH and p,p'-DDT in soil respond to a 
      proxy for climate change? Insights from a field study on the eastern Tibetan 
      Plateau.
PG  - 116824
LID - S0269-7491(21)00404-8 [pii]
LID - 10.1016/j.envpol.2021.116824 [doi]
AB  - While the influence of climate change on the fate of persistent organic 
      pollutants (POPs) is becoming a topic of global concern, it has yet to be 
      demonstrated how POPs and their transformation products in soil respond to a 
      changing climate at the local scale. We conducted a year-long field experiment 
      with spiked soils to investigate the impact of climate on the dissipation of 
      gamma-hexachlorocyclohexane (gamma-HCH) and p,p'-dichlorodiphenyltrichloroethane 
      (p,p'-DDT) as well as the formation of their products. Four sites along an 
      elevational gradient on the eastern Tibetan Plateau were selected to represent 
      four scenarios ranging from a dry and cold to a warm and humid climate. Based on 
      the measured concentrations of the two pesticides and their transformation 
      products, we calculated the dissipation rates of gamma-HCH and p,p'-DDT in soil using 
      two biphasic kinetic models, and the formation rates of transformation products 
      using a mid-point rectangular approximation method. The spiked gamma-HCH generally 
      showed the expected decrease in dissipation from soils with increasing altitudes, 
      and therefore decreasing temperature and precipitation, whereas dissipation of 
      p,p'-DDT was influenced more by photolysis and sequestration in soil. The 
      formation rates of the primary products of gamma-HCH (i.e. gamma-HCH-->PeCCH and 
      gamma-HCH-->TeCCH) and p,p'-DDT (i.e. p,p'-DDT-->p,p'-DDE and p,p'-DDT-->p,p'-DDD) indicate 
      that a warmer and wetter climate favors dechloroelimination (anaerobic 
      biodegradation) over dehydrochlorination (aerobic biodegradation). The 
      significantly longer dissipation half-lives of gamma-HCH at the coldest site suggests 
      that the fate of POPs in frozen regions (e.g. polar regions) needs more 
      attention. Overall, the fate of more volatile chemicals (e.g. gamma-HCH) might be 
      more responsive to the climate change.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - Ding, Yang
AU  - Ding Y
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan, 430074, China; Department of Physical and 
      Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, 
      Canada. Electronic address: cugdingyang@163.com.
FAU - Li, Li
AU  - Li L
AD  - Department of Physical and Environmental Sciences, University of Toronto 
      Scarborough, Toronto, ON M1C 1A4, Canada; School of Community Health Sciences, 
      University of Nevada, Reno, Reno, NV, 89557, USA.
FAU - Wania, Frank
AU  - Wania F
AD  - Department of Physical and Environmental Sciences, University of Toronto 
      Scarborough, Toronto, ON M1C 1A4, Canada.
FAU - Huang, Huanfang
AU  - Huang H
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Organic 
      Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 
      Guangzhou, 510640, China.
FAU - Zhang, Yuan
AU  - Zhang Y
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China.
FAU - Peng, Bo
AU  - Peng B
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan, 430074, China.
FAU - Chen, Yingjie
AU  - Chen Y
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan, 430074, China.
FAU - Qi, Shihua
AU  - Qi S
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Wuhan, 430074, China; School of Environmental Studies, China 
      University of Geosciences, Wuhan, 430074, China. Electronic address: 
      shihuaqi@cug.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20210225
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Pesticides)
RN  - 0 (Soil)
RN  - 59NEE7PCAB (Hexachlorocyclohexane)
RN  - CIW5S16655 (DDT)
SB  - IM
MH  - Climate Change
MH  - DDT/analysis
MH  - Environmental Monitoring
MH  - Hexachlorocyclohexane/analysis
MH  - *Hydrocarbons, Chlorinated/analysis
MH  - *Pesticides/analysis
MH  - Soil
MH  - Tibet
OTO - NOTNLM
OT  - Climate change
OT  - Environmental fate
OT  - Persistent organic pollutants (POPs)
OT  - Pesticides
OT  - Transformation products
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2021/03/11 06:00
MHDA- 2021/04/21 06:00
CRDT- 2021/03/10 17:47
PHST- 2020/12/08 00:00 [received]
PHST- 2021/02/18 00:00 [revised]
PHST- 2021/02/19 00:00 [accepted]
PHST- 2021/03/11 06:00 [pubmed]
PHST- 2021/04/21 06:00 [medline]
PHST- 2021/03/10 17:47 [entrez]
AID - S0269-7491(21)00404-8 [pii]
AID - 10.1016/j.envpol.2021.116824 [doi]
PST - ppublish
SO  - Environ Pollut. 2021 Jun 1;278:116824. doi: 10.1016/j.envpol.2021.116824. Epub 
      2021 Feb 25.