PMID- 29096307
OWN - NLM
STAT- MEDLINE
DCOM- 20180418
LR  - 20181202
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 233
DP  - 2018 Feb
TI  - Organochlorine pesticides in the sedimentary core of the southern Tibetan 
      Plateau: The missing pieces induced by lateral remobilization.
PG  - 340-347
LID - S0269-7491(17)33063-4 [pii]
LID - 10.1016/j.envpol.2017.10.078 [doi]
AB  - The sedimentary core in remote alpine lakes has been recognized as an ideal proxy 
      to reconstruct the emission and air deposition histories of persistent organic 
      pollutants (POPs). Nevertheless, POPs formerly stored in a catchment might also 
      contribute to the variation in the lake sediment by lateral remobilization. In 
      this study, to reveal the relative importance of lateral remobilization, we 
      measured the vertical profiles and isomeric ratios of 
      dichlorodiphenyltrichloroethanes (DDTs), hexachlorocyclohexanes (HCHs) and 
      endosulfan in a dated sedimentary core collected from Lake Yamzho Yumco in the 
      southern Tibetan Plateau. In addition to the flux peaks in the 1970s 
      corresponding to the heavy atmospheric deposition of DDTs and HCHs, these 
      pollutants' fluxes displayed rebounds in the flood periods, with characteristic 
      low ratios of DDT/DDE (alpha-/beta-HCH). This might indicate a massive remobilization of 
      "weathered" pesticides from catchment soil to the lake because of strong 
      hydro-dynamics. Moreover, the relative contribution of lateral remobilization to 
      the lake sediment in the past decades was recognized through the correlation 
      between DDT/DDE (alpha-/beta-HCH) ratios and  summation operatorDDT ( summation operatorHCH) fluxes. The results showed that 
      the lateral remobilization contributed to 20-42% of the total fluxes. This study 
      discriminated the air deposition from the contribution of lateral remobilization, 
      which improves current understanding of the vertical POPs profiles in the 
      sedimentary core.
CI  - Copyright (c) 2017 Elsevier Ltd. All rights reserved.
FAU - Li, Jun
AU  - Li J
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Beijing 100083, China; School of the Earth Sciences and Resources, 
      China University of Geosciences, Beijing 100083, China.
FAU - Yuan, Guo-Li
AU  - Yuan GL
AD  - State Key Laboratory of Biogeology and Environmental Geology, China University of 
      Geosciences, Beijing 100083, China; School of the Earth Sciences and Resources, 
      China University of Geosciences, Beijing 100083, China. Electronic address: 
      yuangl@cugb.edu.cn.
FAU - Duan, Xu-Chuan
AU  - Duan XC
AD  - School of the Earth Sciences and Resources, China University of Geosciences, 
      Beijing 100083, China.
FAU - Sun, Yong
AU  - Sun Y
AD  - School of the Earth Sciences and Resources, China University of Geosciences, 
      Beijing 100083, China.
FAU - Yu, Hong-Hui
AU  - Yu HH
AD  - School of the Earth Sciences and Resources, China University of Geosciences, 
      Beijing 100083, China.
FAU - Wang, Gen-Hou
AU  - Wang GH
AD  - School of the Earth Sciences and Resources, China University of Geosciences, 
      Beijing 100083, China.
LA  - eng
PT  - Journal Article
DEP - 20171105
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Hydrocarbons, Chlorinated)
RN  - 0 (Pesticides)
RN  - 0 (Soil)
RN  - 319-84-6 (alpha-hexachlorocyclohexane)
RN  - 59NEE7PCAB (Hexachlorocyclohexane)
RN  - CIW5S16655 (DDT)
RN  - OKA6A6ZD4K (Endosulfan)
RN  - YM80ODM9PD (beta-hexachlorocyclohexane)
SB  - IM
MH  - China
MH  - DDT/analysis
MH  - Endosulfan/analysis
MH  - *Environmental Monitoring
MH  - Geologic Sediments/*chemistry
MH  - Hexachlorocyclohexane/analysis
MH  - Hydrocarbons, Chlorinated/*analysis
MH  - Lakes/chemistry
MH  - Pesticides/*analysis
MH  - Soil
MH  - Tibet
OTO - NOTNLM
OT  - Atmospheric deposition
OT  - Lateral remobilization
OT  - Organochlorine pesticides
OT  - Sedimentary core
OT  - Tibetan plateau
EDAT- 2017/11/03 06:00
MHDA- 2018/04/19 06:00
CRDT- 2017/11/03 06:00
PHST- 2017/07/21 00:00 [received]
PHST- 2017/10/18 00:00 [revised]
PHST- 2017/10/20 00:00 [accepted]
PHST- 2017/11/03 06:00 [pubmed]
PHST- 2018/04/19 06:00 [medline]
PHST- 2017/11/03 06:00 [entrez]
AID - S0269-7491(17)33063-4 [pii]
AID - 10.1016/j.envpol.2017.10.078 [doi]
PST - ppublish
SO  - Environ Pollut. 2018 Feb;233:340-347. doi: 10.1016/j.envpol.2017.10.078. Epub 
      2017 Nov 5.