PMID- 37574073
OWN - NLM
STAT- Publisher
LR  - 20231021
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 903
DP  - 2023 Dec 10
TI  - Can water dating trace the transport history of HCHs in the ocean?
PG  - 166227
LID - S0048-9697(23)04852-0 [pii]
LID - 10.1016/j.scitotenv.2023.166227 [doi]
AB  - Long-range atmospheric and oceanic transport play a crucial role in the 
      accumulation of persistent organic pollutants (POPs), including 
      hexachlorocyclohexanes (HCHs), in the Arctic Ocean. Herein, transient tracers, 
      specifically chlorofluorocarbon-12 and sulfur hexafluoride, were used to 
      determine the ventilation time of HCHs. Results revealed that dissolved HCHs can 
      penetrate to a depth of ~500 m in the western Arctic Ocean, corresponding to 
      water masses with a mean age of 45 +/- 14 years. The average long-range transport 
      time for alpha-HCH from initial atmospheric release to entering the western Arctic 
      Ocean was estimated to be >30 +/- 5 years, indicating continued moderate to high 
      ecological risks from HCHs in the Arctic. This study demonstrates that transient 
      tracers serve as effective water dating tools to elucidate the transport history 
      of stable POPs in the ocean, contributing to a better understanding of their 
      environmental characteristics and fate.
CI  - Copyright (c) 2023 Elsevier B.V. All rights reserved.
FAU - Wang, Weimin
AU  - Wang W
AD  - School of Chemical Engineering and Technology, Tianjin University, Tianjin 
      300350, China; Zhejiang Institute of Tianjin University, Ningbo 315000, China.
FAU - Zheng, Haowen
AU  - Zheng H
AD  - College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China.
FAU - Huang, Peng
AU  - Huang P
AD  - College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, 
      China.
FAU - Ye, Jiandong
AU  - Ye J
AD  - College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China.
FAU - Liu, Mengyang
AU  - Liu M
AD  - State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong 
      Kong, 999077, China.
FAU - Lin, Yan
AU  - Lin Y
AD  - School of Environmental Science and Engineering, Xiamen University of Technology, 
      Xiamen 361024, China.
FAU - Li, Yifan
AU  - Li Y
AD  - School of Environment, Harbin Institute of Technology, Harbin 150090, China.
FAU - Chen, Mian
AU  - Chen M
AD  - College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China.
FAU - Ke, Hongwei
AU  - Ke H
AD  - College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China.
FAU - Cai, Minggang
AU  - Cai M
AD  - College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China. 
      Electronic address: mgcai@xmu.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20230811
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - Arctic
OT  - Hexachlorocyclohexanes
OT  - Long-range transport
OT  - Tracers
OT  - Ventilation
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- 2023/08/14 00:42
MHDA- 2023/08/14 00:42
CRDT- 2023/08/13 19:25
PHST- 2023/04/19 00:00 [received]
PHST- 2023/07/20 00:00 [revised]
PHST- 2023/08/09 00:00 [accepted]
PHST- 2023/08/14 00:42 [pubmed]
PHST- 2023/08/14 00:42 [medline]
PHST- 2023/08/13 19:25 [entrez]
AID - S0048-9697(23)04852-0 [pii]
AID - 10.1016/j.scitotenv.2023.166227 [doi]
PST - ppublish
SO  - Sci Total Environ. 2023 Dec 10;903:166227. doi: 10.1016/j.scitotenv.2023.166227. 
      Epub 2023 Aug 11.