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Microplastics in Kenya's marine nearshore surface waters: Current status

Marine Pollution Bulletin 2022 28 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Charles Mitto Kosore, Loice Ojwang, Justin K. Maghanga, Joseph Nyingi Kamau, Daniel Abel Shilla, Gert Everaert, Farhan R. Khan, Yvonne Shashoua

Summary

Researchers collected microplastics from six locations along Kenya's marine nearshore surface waters, finding a mean concentration of 0.58 MPs per cubic meter with fragments (55%) and polypropylene (52%) as the dominant type and polymer. Malindi was identified as a hotspot for microplastic pollution, providing baseline data to support policy development in the region.

Microplastics (MPs) were collected at six locations along Kenya's marine nearshore surface waters using a 300 μm mesh-size manta net. The samples were washed over a 125-μm mesh size sieve No.120 into a glass jar and preserved in 70% ethanol. MPs were sorted, counted visually under a dissecting microscope then identified using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. A total of 1473 particles with an overall mean concentration of 0.58 ± 1.29 MPs m, were collected. Fragments were the most common types representing 55% of the total MPs, followed by films (40%) and fibers (2%). Polypropylene (PP) was dominant (52%), high-density polyethylene (HDPE) comprised 38% and low density polyethylene (LDPE) 10% of the total MPs. This study provided baseline information, in which Malindi was identified as a hot spot for MPs pollution. Furthermore, the outcomes will assist policy formulations and management strategies aimed at controlling marine plastics.

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