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Characteristics of microplastics pollution in important commercial coastal seafood of Central Java, Indonesia
Summary
Researchers measured microplastic contamination in three commercially important seafoods from coastal Indonesia — milkfish, blood cockles, and green mussels — finding that all three contained plastic particles, with green mussels carrying the highest load at an average of 71 particles per individual. The variety of polymer types detected, including rubber and styrene compounds, confirms that microplastics are entering the human food chain through commonly consumed seafood.
The contamination levels and characteristics of microplastics (MPs) were assessed in commercial seafood from the coastal region of Semarang, Central Java, Indonesia. This study covers milkfish (Chanos chanos), blood cockles (Anadara granosa) and green mussels (Perna viridis). Green mussels had the highest abundance (70.7 ± 48.0 particles/individual), followed by blood cockles (18.3 ± 7.3 particles/individual) and milkfish (5.9 ± 4.3 particles/individual). Fragments dominated in seafood samples (37–87.6 %), except for milkfish, which was mainly dominated by fibres (65,5 %). MPs in the 50-100 µm size range were primarily found in bivalve samples (34–40 %), while larger particles (100-1000 µm) were abundant in milkfish (53.1 %). Most MPs detected were grey in blood cockles (51 %), brown in green mussels (50 %), and black and brown in milkfish (33 %). Regarding polymer types, rubber (12–14 %), styrene copolymers (9–13 %), and cellulose (4–25 %) dominated MPs in milkfish and green mussels. The three most important polymers in blood cockles were cellulose (40 %), polyamide (20 %), and polyethylene (11 %). These findings confirm that MPs contaminate our daily diet, implying that further research is needed into the potential health risks of ingested MPs.
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