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Assessment of ecological risk from microplastic pollution in sediments: A case study in Han river estuary (Vietnam)
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Researchers analyzed sediment samples from the Han River estuary in Vietnam across two seasons, finding microplastic concentrations nearly three times higher during the rainy season (7,295 particles/kg) than the dry season. Polyethylene terephthalate (PET) — the plastic used in water bottles — was the most common polymer detected, with seasonal flooding likely flushing plastic waste from land into the estuary.
Microplastic (MP) pollution has emerged as a critical environmental concern, posing ecological risks across various aquatic systems.In this study, sediment samples from the Han river estuary (Vietnam) were analyzed during the 2023 rainy season and the 2024 dry season to evaluate the spatial and temporal variations in MP contamination.The characterization of MPs was conducted based on density, morphology (shape and size), color, polymer composition, and pollutant load index (PLI).Results revealed the presence of MPs at all sampling sites, exhibiting clear seasonal and spatial variability.MP concentrations were substantially higher in the rainy season (7,295.3MPs/kg) compared to the dry season (2.371 MPs/kg).Small fragments and fibers (50-150 m) were predominant, indicating intensive degradation and fragmentation processes.White particles were most abundant during the rainy season, while green particles dominated during the dry season.Seventeen polymer types were identified in the rainy season and ten in the dry season, with polyethylene terephthalate (PET) being the most prevalent polymer (2,828.7 and 792 MPs/kg, respectively).The average PLI value of 2.9 placed the area in pollution group I-representing a low pollutant load.However, the persistence and potential ecological risks associated with MPs warrant further investigation.Future studies should aim to refine the classification of plastic polymers and support the development of comprehensive management strategies to regulate plastic usage in daily life and industrial sectors, thereby mitigating MP pollution in estuarine ecosystems.
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Study on density, shape, color, and composition of microplastics in sediments at the Han River estuary (Da Nang)
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Researchers analyzed microplastic density, shape, color, and polymer composition in sediments at eight sites along the Han River estuary in Da Nang, Vietnam, finding concentrations ranging from 348.2 to 3,567.8 MPs/kg. PET was the dominant polymer (38.7%), followed by polyester and nylon, with fibers and fragments together accounting for 98.6% of particles found.
Spatial and seasonal abundance and characteristics of microplastics along the Red River to the Gulf of Tonkin, Vietnam
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Researchers surveyed microplastic contamination along the entire Red River from Hanoi to the Ba Lat estuary in Vietnam, sampling during both dry and rainy seasons. They found microplastics in all water and sediment samples, with fibers being the dominant shape and polyethylene, polypropylene, and PET the most common polymers. Microplastic levels were generally higher in sediment during the dry season, suggesting seasonal hydrology plays an important role in how plastics accumulate in river systems.
Abundance and variation of microplastics between seasons in a tropical estuary: The case of Can Gio estuary, Vietnam
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Researchers assessed seasonal variation in microplastic abundance and characteristics in the Can Gio estuary, Vietnam, across wet and dry seasons. Microplastic concentrations were higher during the wet season, with seasonal plastic transport linked to river discharge and rainfall-driven inputs from upstream urban sources.
Microplastic pollution and ecological risk in estuaries and coastal areas: A case study at Han River estuary, Da Nang city, Vietnam
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This study measured microplastic pollution in Vietnam's Han River estuary and found plastic particles at every sampling location, with levels varying by season. While focused on environmental monitoring, the findings matter for human health because estuarine waters supply local fisheries and communities, creating direct exposure pathways through seafood consumption.
Analyze and Compare the Microplastic Pollution in the Water Samples at Han River Estuary (Da Nang)
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Researchers analyzed and compared microplastic abundance, shape, color, size, and polymer type in surface water and water column samples from sixteen sites at the Han River estuary in Da Nang, Vietnam during the 2023 rainy season, finding microplastics present in nearly all samples with higher densities in water column samples.
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