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Quantitative assessment of microplastic in sandy beaches of Gujarat state, India
Summary
Researchers quantified microplastic contamination across 20 sandy beaches on the Gujarat coast of India, finding average abundances ranging from 1.4 to 26 MPs per kilogram of sediment, with higher concentrations at beaches under greater anthropogenic pressure. Thread/fiber morphologies were the most abundant type, and the spatial distribution reflected local population density and tourist activity.
The present study was carried out to quantify microplastic prevalence among 20 sandy beaches on the Gujarat coast. Beaches were categorised into three different classes, viz. low-impacted sites, moderately impacted sites, and highly impacted sites based on anthropogenic pressure. Microplastic (MP) (≤ 5 mm) contamination on the beaches varied with an average of 1.4 MPs/kg to 26 MPs/kg sediment. Sutrapada site-1 and Porbandar showed the highest and lowest mean abundance of microplastics, respectively, among 20 selected beaches. Out of the total assessed microplastics, threads were the maximum (89.98%), followed by the films (4.75%), fragments (3.36%) and foam (1.89%). In terms of colour and size, different microplastics were recorded in this study. The chemical composition of microplastics was identified by ATR-FTIR as polypropylene (47.5%), polyethylene (26%), and polystyrene (25%). Tourism and fishing activities are the possible sources of higher microplastic contamination at highly impacted sites.