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Characterization and ecological health risks of microplastics in the water and sediment of Xinyanggang River Estuary
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Scientists found tiny plastic particles (microplastics) in both the water and sediment of a river estuary in China, with the highest levels showing up in summer during rainy season. While the overall amount of plastic wasn't huge, the types of plastic found were still flagged as potentially harmful to the ecosystem, a reminder that these particles can build up in waterways that eventually connect to the seafood and water we consume.
Microplastic (MP) pollution in aquatic environment has increased concerns. This study comprehensively examined properties and health risk to ecosystem of MPs in Xinyanggang River Estuary. Monthly sampling in 2023 detected MPs in water column (6.7 ± 0.55–11.6 ± 0.63 particles/L) and sediment (6.2 ± 0.78–10.2 ± 0.53 particles/g), with abundance peaking in summer, coinciding with the rainy season. The major features of the detected MPs included transparency and fiber, rayon, PVDF, PS, PE and PP composition. The dominant size fraction of detected MPs was 0.001–0.25 mm. Ecological risk assessment suggested relatively low load of MPs entering the Xinyanggang Estuary. However, polymer risk index (PRI) and potential ecological health risk index (PERI) suggested that MPs in Xinyanggang River are hazardous to ecosystem. This study firstly characterized MP contamination in Xinyangang River Estuary, and the provided results can guide the management of MPs in water environment more broadly.
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