期刊
MARINE POLLUTION BULLETIN
卷 116, 期 1-2, 页码 291-297出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.12.055
关键词
Danio rerio; Microplastics; Phenanthrene; 17 alpha-ethinylestradiol; Sorption; Bioavailability
资金
- NERC [bas0100036, NE/N006526/1] Funding Source: UKRI
- Natural Environment Research Council [bas0100036] Funding Source: researchfish
Microplastics (MPs) are prevalent in marine ecosystems. Because toxicants (termed here co-contaminants) can sorb to MPs, there is potential for MPs to alter co-contaminant bioavailability. Our objective was to demonstrate sorption of two co-contaminants with different physicochemistries Iphenanthrene (Phe), log(10)K(ow) = 4.57; and 17 alpha-ethinylestradiol (EE2), log(10)K(ow) = 3.67] to MPs; and assess whether co-contaminant bioavailability was increased after MP settlement. Bioavailability was indicated by gene expression in larval zebrafish. Both Phe and EE2 sorbed to MPs, which reduced bioavailability by a maximum of 33% and 48% respectively. Sorption occurred, but was not consistent with predictions based on co-contaminant physicochemistry (Phe having higher log(10)K(ow) was expected to have higher sorption). Contaminated MPs settled to the bottom of the exposures did not lead to increased bioavailability of Phe or EE2. Phe was 48% more bioavailable than predicted by a linear sorption model, organism-based measurements therefore contribute unique insight into MP co-contaminant bioavailability. (C) 2016 The Authors. Published by Elsevier Ltd.
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