Pollutants in Plastics within the North Pacific Subtropical Gyre

Qiqing Chen, Julia Reisser*, Serena Cunsolo, Christiaan Kwadijk, M.J.J. Kotterman, Maira Proietti, Boyan Slat, Francesco Ferrari, Anna Schwarz, Aurore Levivier, Daqiang Yin, Henner Hollert, A.A. Koelmans

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Here we report concentrations of pollutants in floating plastics from the North Pacific accumulation zone (NPAC). We compared chemical concentrations in plastics of different types and sizes, assessed ocean plastic potential risks using sediment quality criteria, and discussed the implications of our findings for bioaccumulation. Our results suggest that at least a fraction of the NPAC plastics is not in equilibrium with the surrounding seawater. For instance, ‘hard plastic’ samples had significantly higher PBDE concentrations than ‘nets and ropes’ samples, and 29% of them had PBDE composition similar to a widely used flame-retardant mixture. Our findings indicate that NPAC plastics may pose a chemical risk to organisms as 84% of the samples had at least one chemical exceeding sediment threshold effect levels. Furthermore, our surface trawls collected more plastic than biomass (180 times on average), indicating that some NPAC organisms feeding upon floating particles may have plastic as a major component of their diets. If gradients for pollutant transfer from NPAC plastic to predators exist (as indicated by our fugacity ratio calculations), plastics may play a role in transferring chemicals to certain marine organisms.
Original languageEnglish
Pages (from-to)446-456
JournalEnvironmental Science and Technology
Volume52
Issue number2
Early online date29 Nov 2017
DOIs
Publication statusPublished - Jan 2018

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