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Original research — experimental, observational, or case-control study. Direct primary evidence.
Human Health Effects
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Toxicity of polystyrene microplastics on juvenile Oncorhynchus mykiss (rainbow trout) after individual and combined exposure with chlorpyrifos
Journal of Hazardous Materials2020
138 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 55
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Parichehr Hanachi
Samaneh Karbalaei,
Samaneh Karbalaei,
Samaneh Karbalaei,
Samaneh Karbalaei,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Parichehr Hanachi
Parichehr Hanachi
Tony R. Walker,
Parichehr Hanachi
Tony R. Walker,
Parichehr Hanachi
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Parichehr Hanachi
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Samaneh Karbalaei,
Samaneh Karbalaei,
Samaneh Karbalaei,
Parichehr Hanachi
Parichehr Hanachi
Parichehr Hanachi
Parichehr Hanachi
Parichehr Hanachi
Parichehr Hanachi
Parichehr Hanachi
Gholamreza Rafiee,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Samaneh Karbalaei,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Parvaneh Seifori,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Samaneh Karbalaei,
Samaneh Karbalaei,
Parvaneh Seifori,
Parichehr Hanachi
Parichehr Hanachi
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Samaneh Karbalaei,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Tony R. Walker,
Samaneh Karbalaei,
Tony R. Walker,
Tony R. Walker,
Parichehr Hanachi
Summary
Researchers tested the effects of pristine and chlorpyrifos-loaded polystyrene microplastics on juvenile rainbow trout, examining tissue damage and physiological responses. They found that microplastics carrying the pesticide caused more severe histopathological changes in the gills and liver than either contaminant alone. The study provides evidence that microplastics can act as vectors for pesticides, amplifying their toxic effects on freshwater fish.
Microplastic (MP) sorption and transfer of chemical contaminants has been widely reported, yet few studies have investigated combined effects of contaminant-loaded MPs on organisms. This study examined effects of pristine or chlorpyrifos (CPF)-loaded polystyrene (PS) fragments on histopathological and histomorphometrical biomarkers in rainbow trout (Onchorhynchus mykiss). In laboratory, O. mykiss were exposed for 96 h to pristine PS-MPs concentrations (30 or 300 µg/L), concentrations of CPF alone (2 or 6 µg/L), and the same concentrations of CPF in the presence of PS-MPs in aquaria. Results showed the highest histopathological alterations in both CPF concentrations and when combined with PS-MPs in fish gills. Alternatively, high histopathological lesions including massive necrosis, infiltration of inflammatory cells, and shed of villi tips were observed in fish gut in high CPF concentrations combined with high PS-MP concentrations of (6 μg/L CPF+300 μg/L PS-MPs). Individual CPF and PS-MP concentrations or combined together showed significant changes in histomorphometrical biomarkers in fish gills, gut and skin. Findings highlight that pristine PS-MPs cause toxicity and increase adverse effects of CPF in O. mykiss, especially in gill tissue. We present evidence that pristine short-term exposure to even low concentrations of PS-MPs has a significant impact on biomarker responses in O. mykiss.