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Spatio-temporal distribution patterns and risk assessment of microplastics along a coastal beach in southern Bangladesh
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Scientists studying a beach in Bangladesh found that tiny plastic bits (microplastics) wash in mostly from rivers, with pollution levels spiking during monsoon season and worst along the eastern shore. Some of these plastic fragments—including a particularly toxic type called PVC—pose real risks to marine life, and since fish and other seafood can absorb these particles, this pollution may eventually make its way into what ends up on our plates.
This study provides a detailed, bi-seasonal analysis of microplastic (MP) distribution in Kuakata's coastal region, which is influenced by both terrestrial and marine pollution sources. The research documented spatio-temporal variation of MP pollution, with the use of stereomicroscopy for morphological characterization and ATR-FTIR for polymer identification. The analysis revealed that MP concentration peaked during the monsoon season, with river flow identified as the primary distributing factor. Higher degree of contamination was observed along the eastern coastline, attributed to land-based sources and degradation of larger plastics like polyethylene (PE) and polypropylene (PP). White, grey, and transparent MPs (70.06%) were dominant, while fragments were the most prevalent morphological shape (59.67%). Based on these findings, it is speculated that long-distance river transport is the major contributor to MP accumulation, overshadowing local sources and tourist activities. The combination of morphological study with grain size analysis depicts the factors influencing MP degradation, transport, and accumulation. Additionally, SEM analysis revealed surface irregularities like cracks and pits, indicating environmental breakdown. Detailed risk assessments, including pollution load index (PLI), potential risk index (PRI), potential ecological risk index (PERI), and polymer hazard index (PHI), highlighted varying ecological risks. Although hazardous polymers like polyvinyl chloride (PVC) were found in small level, their high hazard score contributed to elevated risks. Principal component analysis (PCA) revealed distinct distribution patterns and common origins for different plastic types. Pellet, film, and fiber particles showed potential commonalities in origin and transport pathways. The findings provide dynamic insights into the MP pollution scenario, offering a foundation for future advanced research.
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Microplastic Pollution in Commercially Important Seafood from Chandipur, Bay of Bengal, East Coast of India: A Detailed Risk Analysis
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Scientists tested popular fish and shrimp from India's Bay of Bengal coast and found tiny plastic particles (microplastics) not just in the guts, but also in the muscle tissue — the part people actually eat. Some of these plastics, including PVC and PET (common in pipes and bottles), were found at levels considered hazardous, and contamination was worse during monsoon season, likely due to rain washing plastic waste into the sea. This matters because eating seafood is a direct way microplastics and their chemicals could enter our bodies, and this study is among the first to measure that risk in this specific region.
Assessment of microplastics in coastal ecosystem of Bangladesh
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Researchers surveyed microplastic contamination in water, beach sand, and fish along two major coastal areas of Bangladesh. Microplastics were found in every sample type, with fibers being the most common shape and polyethylene and polypropylene the dominant plastic types. Fish accumulated microplastics in their digestive tracts and body tissues, raising concerns about human exposure through seafood consumption in the region.
From beaches to mangroves: Spatiotemporal mapping and risk profiling of microplastics in coastal Bangladesh
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A comprehensive survey of microplastic contamination along the entire coastline of Bangladesh found plastic particles at all 18 sampling sites during both monsoon and winter seasons, with polypropylene, polyethylene, and polystyrene making up the majority of the material. Concentrations averaged 385–471 particles per 100 grams of sediment, and ecological risk assessments classified most sites as ranging from "danger" to "extreme danger" for marine life. Bangladesh's densely populated and heavily plastic-polluted coast represents a serious environmental hotspot requiring urgent monitoring and management.
Quantification, characterization and risk assessment of microplastics from five major estuaries along the northern Bay of Bengal coast
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Researchers measured microplastic pollution in five major estuaries along the Bay of Bengal coast in Bangladesh and found contamination at every site, with polyethylene being the most common plastic type. The rivers were classified at the most severe hazard level for microplastic contamination based on the types of polymers found. Since these estuaries supply water and fish to millions of people, the contamination raises concerns about human exposure through drinking water and seafood.
Spatiotemporal distribution of microplastic debris in the surface beach sediment of the southeastern coast of Bangladesh
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A spatiotemporal analysis of microplastics in beach sediments across 7 coastal sites in Bangladesh found an average concentration of 242 particles per kilogram dry weight, with significant seasonal and spatial variation driven by monsoon patterns and proximity to urban areas.
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