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Microplastics in sediment of River Nun in the Niger Delta of Nigeria: abundance, distribution pattern and polymer types
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Scientists found tiny plastic particles, along with hormone-disrupting chemicals called phthalates, in the sediment of a major river in Nigeria's Niger Delta, an area that many people depend on for fishing and drinking water. Most of these plastic bits were extremely small (under 1mm) and broken down from larger plastic waste, meaning they can easily enter the food chain through fish and shellfish that people eat. While this study focused on the environment rather than direct human health effects, it highlights growing pollution that could increase our everyday exposure to plastics and the chemicals attached to them.
This study investigates the abundance, distribution pattern, and polymer types of microplastics in sediments of River Nun, Niger Delta, Nigeria. Sediment samples were collected from six locations over six months (January–March and July–September 2024) and analyzed using standard methods. Results revealed a spatio-temporal variation in microplastic abundance, ranging from not detected to 174 particles/mg. Fragments (45–74%) were the most prevalent shapes, while fibres and beads varied across locations and seasons. Smaller particles (<1 mm) constituted 60–90%, reflecting advanced degradation. Polymer analysis identified five major types: polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), and nylon. Chemical analysis detected phthalates, including DiBP and DEHP, with peak concentrations of 69.11 ppm. These findings underline the pervasive nature of microplastic pollution and its ecological threats. This study provides critical baseline data for understanding microplastic dynamics in the Nun River ecosystems, emphasizing the need for waste management strategies and sustainable development initiatives in the Niger Delta of Nigeria.
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