PMID- 33823300
OWN - NLM
STAT- MEDLINE
DCOM- 20210601
LR  - 20210601
IS  - 1873-6424 (Electronic)
IS  - 0269-7491 (Linking)
VI  - 281
DP  - 2021 Jul 15
TI  - Terrestrial inputs govern spatial distribution of polychlorinated biphenyls 
      (PCBs) and hexachlorobenzene (HCB) in an Arctic fjord system (Isfjorden, 
      Svalbard).
PG  - 116963
LID - S0269-7491(21)00545-5 [pii]
LID - 10.1016/j.envpol.2021.116963 [doi]
AB  - Considerable amounts of previously deposited persistent organic pollutants (POPs) 
      are stored in the Arctic cryosphere. Transport of freshwater and terrestrial 
      material to the Arctic Ocean is increasing due to ongoing climate change and the 
      impact this has on POPs in marine receiving systems is unknown This study has 
      investigated how secondary sources of POPs from land influence the occurrence and 
      fate of POPs in an Arctic coastal marine system. Passive sampling of water and 
      sampling of riverine suspended particulate matter (SPM) and marine sediments for 
      analysis of polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) was 
      carried out in rivers and their receiving fjords in Isfjorden system in Svalbard. 
      Riverine SPM had low contaminant concentrations (<level of detection-28 pg/g dw 
      SigmaPCB(14), 16-100 pg/g dw HCB) compared to outer marine sediments 630-880 pg/g dw 
      SigmaPCB(14), 530-770 pg/g dw HCB). There was a strong spatial gradient in sediment 
      PCB and HCB concentrations with lowest concentrations in river estuaries and in 
      front of marine-terminating glaciers and increasing concentrations toward the 
      outer fjord. This suggests that rather than leading to increased concentrations, 
      inputs of SPM from land lead to a dilution of contaminant concentrations in 
      nearshore sediments. Preliminary estimates of SPM:water activity ratios suggest 
      that terrestrial particles (with low contaminant concentrations) may have the 
      potential to act as sorbents of dissolved contaminants in the coastal water 
      column, with implications for bioavailability of POPs to the marine food web. 
      There is concern that ongoing increases in fluxes of freshwater, sediments and 
      associated terrestrial material (including contaminants) from land to the Arctic 
      Ocean will lead to increased mobilization and transport of POPs to coastal 
      ecosystems. However, the results of this study indicate that on Svalbard, inputs 
      from land may in fact have the opposite effect, leading to reduced concentrations 
      in coastal sediments and waters.
CI  - Copyright (c) 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.
FAU - Johansen, Sverre
AU  - Johansen S
AD  - Norwegian Institute for Water Research, Tromso, Norway; Norwegian University of 
      Life Sciences, As, Norway; Norwegian Institute for Water Research, Oslo, Norway.
FAU - Poste, Amanda
AU  - Poste A
AD  - Norwegian Institute for Water Research, Tromso, Norway.
FAU - Allan, Ian
AU  - Allan I
AD  - Norwegian Institute for Water Research, Oslo, Norway.
FAU - Evenset, Anita
AU  - Evenset A
AD  - Akvaplan-niva, Tromso, Norway; UiT, The Arctic University of Norway, Tromso, 
      Norway.
FAU - Carlsson, Pernilla
AU  - Carlsson P
AD  - Norwegian Institute for Water Research, Tromso, Norway. Electronic address: 
      pernilla.carlsson@niva.no.
LA  - eng
PT  - Journal Article
DEP - 20210317
PL  - England
TA  - Environ Pollut
JT  - Environmental pollution (Barking, Essex : 1987)
JID - 8804476
RN  - 0 (Water Pollutants, Chemical)
RN  - 4Z87H0LKUY (Hexachlorobenzene)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
SB  - IM
MH  - Arctic Regions
MH  - Ecosystem
MH  - Environmental Monitoring
MH  - Estuaries
MH  - Geologic Sediments
MH  - Hexachlorobenzene/analysis
MH  - *Polychlorinated Biphenyls/analysis
MH  - Svalbard
MH  - *Water Pollutants, Chemical/analysis
OTO - NOTNLM
OT  - Coast
OT  - Environmental contaminants
OT  - Particle transport
OT  - Passive water sampling
OT  - Sediments
OT  - Terrestrial runoff
EDAT- 2021/04/07 06:00
MHDA- 2021/06/02 06:00
CRDT- 2021/04/06 20:10
PHST- 2020/07/20 00:00 [received]
PHST- 2021/03/11 00:00 [revised]
PHST- 2021/03/13 00:00 [accepted]
PHST- 2021/04/07 06:00 [pubmed]
PHST- 2021/06/02 06:00 [medline]
PHST- 2021/04/06 20:10 [entrez]
AID - S0269-7491(21)00545-5 [pii]
AID - 10.1016/j.envpol.2021.116963 [doi]
PST - ppublish
SO  - Environ Pollut. 2021 Jul 15;281:116963. doi: 10.1016/j.envpol.2021.116963. Epub 
      2021 Mar 17.