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Preliminary study of microplastics in a tropical river impacted by a megacity (Saigon River, Ho Chi Minh City, Vietnam)
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Scientists checked the Saigon River, which flows through a major Vietnamese city, and found tiny plastic particles called microplastics throughout the water. This matters because rivers like this are sources of drinking water and food (like fish), meaning these plastic bits could end up on our plates, and we're still learning what that means for our health. This early study is a wake-up call for more research and better waste management in fast-growing cities worldwide.
International audience
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Microplastic pollution in a tropical river impacted by a developing megacity. The Saigon River - Ho Chi Minh City, Vietnam.
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This international study documented microplastics as an emerging contaminant in the Saigon River in Vietnam, finding plastic particles in a major Southeast Asian urban waterway and contributing to growing evidence of widespread microplastic pollution across tropical river systems.
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Sampling of the Saigon-Dong Nai river system in Vietnam detected microplastic fragments, films, and fibres at concentrations of up to 715,000 particles per cubic metre, primarily sourced from urban runoff, wastewater, and industrial discharge. Because these rivers supply drinking water and support subsistence fishing for millions of people, the findings highlight a significant and largely unquantified human exposure pathway to microplastics in a rapidly urbanising region.
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Researchers compared microplastic pollution in three major Southeast Asian rivers, the Chao Phraya in Thailand, the Saigon River in Vietnam, and the Citarum River in Indonesia, all in densely populated urban areas. Microplastics were found at every sampling site, with the highest levels in Thailand's river. Since these rivers supply water for drinking, agriculture, and fishing for millions of people, the contamination directly affects human microplastic exposure in the region.
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