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Microplastic pollutions in the Anzali Wetland sediments, Southwest Caspian Sea (Guilan Province, Iran)
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Evaluation of microplastic presence and risks in freshwater fish from Anzali International Wetland, Iran
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Scientists found tiny plastic particles (mostly blue plastic fibers) in the gills and guts of fish from an Iranian wetland, with bottom-feeding fish like tench carrying the most contamination. Since these fish are part of the food chain, and some are likely eaten by people, this suggests microplastics could be working their way up to our dinner plates, highlighting the need for better pollution controls and testing methods to understand the full health risks.
Demonstration of MicroPlastics Distribution Map in the Sediment and Water of Gorgan Bay, Caspian Sea
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A 40-station survey of Gorgan Bay in the Caspian Sea detected 16,360 microplastic particles per kilogram of sediment and 211 particles per liter of water, with fiber shapes dominant (>50%) and highest concentrations near river inlets draining agricultural areas. The study establishes baseline contamination data for a semi-enclosed sea under intense agricultural pressure and identifies river inlets as primary microplastic entry points into the Caspian ecosystem.
Microplastic concentration in the sediment of the Istanbul Strait (the Sea of Marmara, Türkiye)
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Researchers found high levels of microplastic pollution in the sediment of the Istanbul Strait, with concentrations ranging from 144 to 700 particles per kilogram of dry sediment, predominantly as tiny fibers less than 1 mm in size. The findings suggest that dense shipping traffic, tourism, and a population of 20 million all contribute to contamination of this critical waterway.
Microplastics in industrial and urban areas in South-West Iran
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Urban and industrial soils in southwest Iran contained up to 347 microplastic particles per 100 grams, with polyester fibers and PP dominant, and residential areas showing the highest contamination levels. Estimated human exposure via soil contact remained below one particle per day, but this baseline data highlights urban soils as underappreciated microplastic exposure pathways for both adults and children.
Characterisation and abundance of microplastic pollution in sediments of Banten Bay, Indonesia
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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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