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Spatial Patterns, Composition, and Size Characteristics of Riverbank and Floating Macroplastic Debris in the Can Tho River, Mekong Delta, Vietnam
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Researchers studying a river in Vietnam's Mekong Delta found that plastic waste, mostly bags, food packaging, and foam containers, piles up on riverbanks and floats downstream in different size patterns, with smaller plastic bits more likely to keep traveling toward the ocean. This matters because as this trash breaks down, it becomes microplastics that can enter drinking water, seafood, and ultimately our bodies, so understanding how plastic moves through rivers helps communities figure out where to intervene before it reaches the sea.
Macroplastic pollution in rivers is an increasing environmental concern because rivers function simultaneously as active transport pathways and temporary storage compartments for land-based plastic waste. This study investigated the spatial distribution, composition, and size characteristics of riverbank and floating macroplastic debris in the Can Tho River, a tidal tributary of the Hau River in the Mekong Delta, Vietnam, to improve understanding of macroplastic transport, selective retention, and environmental partitioning between active transport and temporary storage compartments. Riverbank debris was surveyed at twelve sites spanning urban, peri-urban, and rural sections, while floating debris was quantified using a net-based sampling system. Riverbank accumulations exhibited pronounced local spatial heterogeneity, although litter density and mass density did not differ significantly among river sections. Plastics dominated both environmental compartments, accounting for 53–60% of accumulated debris and more than 95% of floating debris by abundance. Riverbank accumulations were dominated by plastic bags, food packaging, and beverage containers, whereas floating debris was dominated by expanded polystyrene foam products. Significant differences were also observed in material composition, plastic-product composition, and size distribution. Riverbank accumulations contained proportionally larger macroplastics (100–500 mm), whereas floating debris was dominated by smaller macroplastics (50–200 mm), supporting the role of size-dependent transport and selective retention in environmental partitioning. These findings show that floating debris and riverbank accumulations represent complementary components of the riverine plastic continuum, linking active transport and temporary storage through selective environmental partitioning. Integrating floating and riverbank monitoring provides a more comprehensive framework for understanding macroplastic transport and environmental fate while informing management strategies to reduce downstream plastic transport to the Hau River and ultimately estuarine and coastal ecosystems.
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Seasonal and Spatial Distribution of Microplastics in the Can Tho River (Mekong Delta, Vietnam): Occurrence and Characteristics
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Scientists found tiny plastic particles (microplastics) at every single testing site along Vietnam's Can Tho River, in both dry and wet seasons—showing this pollution is widespread and constant, not a one-time event. Since this river is a water source in a densely populated delta region, these findings matter because they suggest people living nearby may be regularly exposed to microplastics through their water supply, though this study didn't directly test health effects. The research gives scientists a baseline to track pollution trends and push for better waste management to reduce plastic contamination in drinking water sources.
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Scientists tested river sediment near major Vietnamese cities (Hanoi, Ho Chi Minh City, Can Tho) and found tiny plastic fragments, many smaller than a grain of sand, in high concentrations, especially near urban areas and where rivers meet the ocean. These plastics were often made from common but potentially hazardous materials like PVC and PET, and since these rivers feed into the food chain and drinking water systems people rely on, this pollution could eventually make its way into what we eat and drink. The findings highlight the need for better plastic waste management across Southeast Asia as the region's plastic use continues
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Researchers investigated the distribution and characteristics of microplastics in the Nhue-Day River Basin in Vietnam, finding that microplastic abundance varies with seasonal changes and anthropogenic activities, posing threats to the ecosystem and the roughly 12 million people who depend on this river.
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Researchers surveyed microplastics in water and sediment along Vietnam's Red River from inland areas to the Gulf of Tonkin, documenting the types, sizes, and polymer compositions present. The findings show how a major river system acts as a pathway delivering plastic pollution from a densely populated landscape into coastal marine waters.
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Researchers characterized the abundance, types, and distribution of microplastics in sediments of Vietnam's three major rivers, contextualizing findings within Vietnam's status as one of the world's top plastic waste-polluting countries with approximately 3.1 million metric tons of mismanaged plastic waste annually.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.