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Chemometric analysis of microplastics in tropical beach sediments of Bali, Indonesia: Distribution, polymer composition, and coastal processes
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This study found microplastic contamination in coastal sediments across all sampled urban and rural islands in the Maldives, with over 90% of particles smaller than 50 micrometers and dominated by polyamide, polyethylene, and polystyrene—patterns suggesting both local waste inputs and ocean-scale transport contribute to contamination across the archipelago.
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Researchers quantified microplastic pollution on a southern Brazilian beach, finding an average of 650 MPs/kg of sediment with highest concentrations near the Mampituba River mouth, dominated by polyethylene, polypropylene, and polyamide particles in the 50–100 µm range. The findings confirm that riverine transport is a major pathway delivering microplastics to coastlines, underscoring the need for upstream source control to protect coastal ecosystems.
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Scientists found tiny plastic particles (mostly small fragments and fibers made of common plastics like polypropylene and polyethylene) buried in the seafloor sediment of Banten Bay, Indonesia, likely from nearby industrial and residential growth. This matters because these coastal waters are used for fishing, and microplastics in sediment can work their way up the food chain into the seafood people eat, though this study didn't directly test human health effects.
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