期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 416, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.125703
关键词
Microplastics; Nanoplastics; Synergistic effect; Organic pollutant; Water-accommodated fraction (WAF)
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1F1A1076876]
- Incheon National University
- National Research Foundation of Korea [2020R1F1A1076876] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study revealed that nano-sized microplastics can synergistically mediate the effects of organic pollutants in aquatic organisms, leading to more significant effects on population growth of organisms than additive effects. This synergistic interaction primarily affected metabolism and transcription, ultimately impacting the reproductive capabilities of the organisms.
Sorption of organic pollutants on microplastics can be an alternative uptake route for organic pollutants in aquatic organisms. To assess the combined effects of microplastics and organic pollutants, we employed phenotypic and transcriptomic analyses to the responses of the marine rotifer Brachionus koreanus to environmentally relevant concentrations of nano-sized microplastic (0.05 mu m), water-accommodated fractions of crude oil, and binary mixtures thereof. Our multigenerational in vivo experiments revealed more than additive effects on population growth of B. koreanus in response to combined exposure, while a single exposure to nano-sized microplastic did not induce observable adverse effects. Synergistic transcriptome deregulation was consistently associated with dramatically higher numbers of differentially expressed genes, and increased gene expression was associated with combined exposure. The majority of synergistic transcriptional alteration was related to metabolism and transcription, with impaired reproduction resulting from energetic reallocation toward adaptation. As further supported by chemistry analysis for polycyclic aromatic hydrocarbons sorption on microplastic, our findings imply that nano-sized microplastics can synergistically mediate the effects of organic pollutants in aquatic organisms.
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