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Microplastics Contamination on the Beach Sand of Rio De Janeiro City: Concentration, Spatial Distribution, Morphology and Polymer Types
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Microplastics Beach Pollution: Composition, Quantification and Distribution on the Southern Coast of Brazil
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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.
Seasonal Variations in Microplastic Pollution in Beach Sediments along the Eastern Coast of Rio de Janeiro State, Brazil
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A survey of 27 beaches along Rio de Janeiro's eastern coast found microplastics on every beach, with winter counts (2,987 particles) nearly five times higher than summer (562 particles), driven by seasonal wind and wave dynamics, with fragments and fibers of polyethylene and polypropylene dominating. The seasonal variation reveals that MP exposure for coastal wildlife and beachgoers fluctuates dramatically with environmental conditions, complicating risk assessments tied to any single sampling window.
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Researchers characterized the types and sources of microplastics found in coastal seawater near Fortaleza, Brazil, identifying fishing activity, household laundry, and food packaging as the dominant sources accounting for over 80% of contamination. The study provides a polymer database that can help identify microplastic origins in other tropical coastal cities with similar human activity patterns.
Microplastic contamination in marine sediment from different regions of the Blue Amazon, Bahia, Brazil
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