Deep sea sediments of the Arctic Central Basin: A potential sink for microplastics

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Kanhai, La Daana K.University of the West Indies (author)

Deep sea sediments of the Arctic Central Basin: A potential sink for microplastics

Article/chapterEnglish2019

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Elsevier BV,2019

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LIBRIS-ID:oai:research.chalmers.se:cc397238-99ae-42c1-a9c3-9eca84a948a0
https://doi.org/10.1016/j.dsr.2019.03.003DOI
https://research.chalmers.se/publication/510146URI
https://research.chalmers.se/publication/513585URI
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-169306URI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

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Deep sea sediments have emerged as a potential sink for microplastics in the marine environment. The discovery of microplastics in various environmental compartments of the Arctic Central Basin (ACB) suggested that these contaminants were potentially being transported to the deep-sea realm of this oceanic basin. For the first time, the present study conducted a preliminary assessment to determine whether microplastics were present in surficial sediments from the ACB. Gravity and piston corers were used to retrieve sediments from depths of 855-4353 m at 11 sites in the ACB during the Arctic Ocean 2016 (AO16) expedition. Surficial sediments from the various cores were subjected to density flotation with sodium tungstate dihydrate solution (Na2WO4 center dot 2H(2)O, density 1.4 g cm(-3)). Potential microplastics were isolated and analysed by Fourier Transform Infrared (FT-IR) spectroscopy. Of the surficial samples, 7 of the 11 samples contained synthetic polymers which included polyester (n = 3), polystyrene (n = 2), polyacrylonitrile (n = 1), polypropylene (n = 1), polyvinyl chloride (n = 1) and polyamide (n = 1). Fibres (n = 5) and fragments (n = 4) were recorded in the samples. In order to avoid mis-interpretation, these findings musi be taken in the context that (i) sampling equipment did not guarantee retrieval of undisturbed surficial sediments, (ii) low sample volumes were analysed (similar to 10 g per site), (iii) replicate sediment samples per site was not possible, (iv) no air contamination checks were included during sampling and, (v) particles < 100 mu m were automatically excluded from analysis. While the present study provides preliminary indication that microplastics may be accumulating in the deep-sea realm of the ACB, further work is necessary to assess microplastic abundance, distribution and composition in surficial sediments of the ACB.

Subject headings and genre

NATURVETENSKAP Geovetenskap och miljövetenskap Geokemi hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geochemistry hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Oceanografi, hydrologi och vattenresurser hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Oceanography, Hydrology and Water Resources hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
Deep Sea
Marine debris
Arctic Ocean
Microplastics
Sediment

Added entries (persons, corporate bodies, meetings, titles ...)

Johansson, CarinaStockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University(Swepub:su)cjoha (author)
Frias, J. P. G. L. (author)
Gårdfeldt, Katarina,1959Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)katarina (author)
Thompson, Richard C.University of Plymouth (author)
O'Connor, Ian (author)
University of the West IndiesInstitutionen för geologiska vetenskaper (creator_code:org_t)

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In:Deep-Sea Research Part I: Oceanographic Research Papers: Elsevier BV145, s. 137-1420967-06371879-0119

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