PMID- 28988083
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180316
LR  - 20180316
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 615
DP  - 2018 Feb 15
TI  - High-resolution sedimentary records of some organochlorine pesticides in Yamzho 
      Yumco Lake of the Tibetan Plateau: Concentration and composition.
PG  - 469-475
LID - S0048-9697(17)32633-5 [pii]
LID - 10.1016/j.scitotenv.2017.09.282 [doi]
AB  - Sediment cores from lakes have been used to reconstruct the historic deposition 
      of persistent organic pollutants (POPs), especially in remote alpine areas. To 
      reconstruct the deposition history of organochlorine pesticides (OCPs) in the 
      Tibetan Plateau (TP), two sediment cores from Yamzho Yumco Lake were drilled and 
      dated with high-resolution, from which 23 OCPs were analyzed in greater detail. 
      Regarding several legacy compounds, concentration peaks in the cores were 
      observed in the 1970s, corresponding to the heavy usage of these compounds around 
      the world. In addition, another peak was found at the end of the 1990s, which was 
      explained as the addition of OCPs released from melting glaciers or the 
      cryosphere due to global warming. Furthermore, it was found that the 
      transformation or degradation of OCPs after deposition in the lake was limited by 
      comparing the values of isomeric ratios at different times, such as 
      (DDD+DDE)/ summation operatorDDTs, o,p'-DDT/p,p'-DDT and beta-HCH/ summation operatorHCHs. Such results ensure that the 
      detected OCPs in the lake sediments really reflect their characteristics at the 
      time of deposition. On the other hand, weak environmental self-purification of 
      the OCPs made them last longer in the TP than in other regions. Reasonably, the 
      fragile ecological environment of the TP would be threatened not only by legacy 
      POPs that remain in the sediments and soils but also by POPs released from 
      melting glaciers or the cryosphere in the next few decades under the influence of 
      global warming. Our research provides an insight into the influence of global 
      warming and glacial melting on the environment of the TP, and further work to 
      gain a better understanding of the environmental processes of POPs in the TP is 
      ongoing.
CI  - Copyright (c) 2017 Elsevier B.V. All rights reserved.
FAU - Sun, Yong
AU  - Sun Y
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 - Li, Jun
AU  - Li J
AD  - School of the Earth Sciences and Resources, China University of Geosciences, 
      Beijing 100083, China.
FAU - Tang, Jianhui
AU  - Tang J
AD  - Key Laboratory of Coastal Environmental Processes and Ecological Remediation, 
      Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 
      264003, 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 - 20171005
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
OTO - NOTNLM
OT  - Glacial melting
OT  - Global warming
OT  - High-resolution dating
OT  - Organochlorine pesticides
OT  - Sediment cores
EDAT- 2017/10/11 06:00
MHDA- 2017/10/11 06:01
CRDT- 2017/10/09 06:00
PHST- 2017/07/23 00:00 [received]
PHST- 2017/09/25 00:00 [revised]
PHST- 2017/09/26 00:00 [accepted]
PHST- 2017/10/11 06:00 [pubmed]
PHST- 2017/10/11 06:01 [medline]
PHST- 2017/10/09 06:00 [entrez]
AID - S0048-9697(17)32633-5 [pii]
AID - 10.1016/j.scitotenv.2017.09.282 [doi]
PST - ppublish
SO  - Sci Total Environ. 2018 Feb 15;615:469-475. doi: 10.1016/j.scitotenv.2017.09.282. 
      Epub 2017 Oct 5.