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Abundance, seasonal variation, and polymer analysis of microplastic pollution in the sediments of Mahim bay, Mumbai, India

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Research Paper 06/02/2025
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Abundance, seasonal variation, and polymer analysis of microplastic pollution in the sediments of Mahim bay, Mumbai, India

Sangeeta P. Salunke, Vaishali Phusate
J. Bio. Env. Sci.26( 2), 130-149, February 2025.
Certificate: JBES 2025 [Generate Certificate]
Key: Arabian seaIndiaMahim BayMicroplasticsSeasonal variations

Abstract

Microplastic pollution has become an urgent global environmental concern, particularly in coastal areas where its adverse effects are pronounced. This study aims to assess the abundance, color distribution, shape distribution, and polymer type distribution of microplastics in Mahim Bay across different seasonal periods. Pre-monsoon concentrations averaged 1055.66 ± 92.981 (Mean ± SD, n=6) microplastic items per kilogram of dry weight, similar to global findings. During the monsoon, concentrations slightly increased to 1080.33 ± 326.79 (Mean ± SD, n=6) microplastic items per kilogram of dry weight, due to intensified hydrological processes. Post-monsoon, concentrations decreased significantly to 563 ± 198.31 (Mean ± SD, n=6) microplastic items per kilogram of dry weight, indicating changes in sediment dynamics. Color distribution varied among locations, with transparent, black and white microplastics being common. Fiber-shaped microplastics dominated, followed by fragments. Polyethylene (PE) and polypropylene (PP) were prevalent polymers. The study highlights seasonal variability in microplastic pollution dynamics and contributes to understanding its impact on marine ecosystems.

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