PMID- 37037817
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230411
LR  - 20230413
IS  - 2041-1723 (Electronic)
IS  - 2041-1723 (Linking)
VI  - 14
IP  - 1
DP  - 2023 Apr 10
TI  - Organic matter degradation causes enrichment of organic pollutants in hadal 
      sediments.
PG  - 2012
LID - 10.1038/s41467-023-37718-z [doi]
LID - 2012
AB  - Burial of persistent organic pollutants (POPs) such as polychlorinated biphenyls 
      (PCBs) in deep-sea sediments contributes to 60% of their historical emissions. 
      Yet, empirical data on their occurrence in the deep-ocean is scarce. Estimates of 
      the deep-ocean POP sink are therefore uncertain. Hadal trenches, representing the 
      deepest part of the ocean, are hotspots for organic carbon burial and 
      decomposition. POPs favorably partition to organic carbon, making trenches likely 
      significant sinks for contaminants. Here we show that PCBs occur in both hadal 
      (7720-8085 m) and non-hadal (2560-4050 m) sediment in the Atacama Trench. PCB 
      concentrations normalized to sediment dry weight were similar across sites while 
      those normalized to sediment organic carbon increased exponentially as the inert 
      organic carbon fraction of the sediment increased in degraded hadal sediments. We 
      suggest that the unique deposition dynamics and elevated turnover of organic 
      carbon in hadal trenches increase POP concentrations in the deepest places on 
      Earth.
CI  - (c) 2023. The Author(s).
FAU - Sobek, Anna
AU  - Sobek A
AUID- ORCID: 0000-0002-1549-7449
AD  - Department of Environmental Science, Stockholm University, Stockholm, Sweden. 
      anna.sobek@aces.su.se.
FAU - Abel, Sebastian
AU  - Abel S
AD  - Department of Environmental Science, Stockholm University, Stockholm, Sweden.
FAU - Sanei, Hamed
AU  - Sanei H
AUID- ORCID: 0000-0002-2961-9654
AD  - Lithospheric Organic Carbon (LOC) Group, Department of Geoscience, Aarhus 
      University, Aarhus, Denmark.
FAU - Bonaglia, Stefano
AU  - Bonaglia S
AUID- ORCID: 0000-0003-4366-0677
AD  - Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden.
FAU - Li, Zhe
AU  - Li Z
AUID- ORCID: 0000-0002-2379-0768
AD  - Department of Environmental Science, Stockholm University, Stockholm, Sweden.
FAU - Horlitz, Gisela
AU  - Horlitz G
AD  - Department of Environmental Science, Stockholm University, Stockholm, Sweden.
FAU - Rudra, Arka
AU  - Rudra A
AD  - Lithospheric Organic Carbon (LOC) Group, Department of Geoscience, Aarhus 
      University, Aarhus, Denmark.
FAU - Oguri, Kazumasa
AU  - Oguri K
AD  - HADAL and Nordcee, Department of Biology, University of Southern Denmark, Odense, 
      Denmark.
AD  - Research Institute for Global Change, Japan Agency for Marine-Earth Science and 
      Technology, Yokosuka, Japan.
FAU - Glud, Ronnie N
AU  - Glud RN
AUID- ORCID: 0000-0002-7069-893X
AD  - HADAL and Nordcee, Department of Biology, University of Southern Denmark, Odense, 
      Denmark.
AD  - Danish Institute for Advanced Study (DIAS), University of Southern Denmark, 
      Odense, Denmark.
AD  - Department of Ocean and Environmental Sciences, Tokyo University of Marine 
      Science and Technology, Tokyo, Japan.
LA  - eng
PT  - Journal Article
DEP - 20230410
PL  - England
TA  - Nat Commun
JT  - Nature communications
JID - 101528555
SB  - IM
PMC - PMC10086072
COIS- The authors declare no competing interests.
EDAT- 2023/04/11 06:00
MHDA- 2023/04/11 06:01
PMCR- 2023/04/10
CRDT- 2023/04/10 23:14
PHST- 2022/11/17 00:00 [received]
PHST- 2023/03/28 00:00 [accepted]
PHST- 2023/04/11 06:01 [medline]
PHST- 2023/04/10 23:14 [entrez]
PHST- 2023/04/11 06:00 [pubmed]
PHST- 2023/04/10 00:00 [pmc-release]
AID - 10.1038/s41467-023-37718-z [pii]
AID - 37718 [pii]
AID - 10.1038/s41467-023-37718-z [doi]
PST - epublish
SO  - Nat Commun. 2023 Apr 10;14(1):2012. doi: 10.1038/s41467-023-37718-z.