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Patterns and variability in the microplastic contamination along the southwest coast of India with emphasis on submarine groundwater discharge sites
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Researchers analyzed microplastic contamination in beach sediments along the southwest coast of India, including submarine groundwater discharge (SGD) sites, finding average loads of 230 particles per 100 g dominated by blue polyethylene fibers. Both SGD and non-SGD sites showed microplastic contamination, with SGD zones potentially acting as conduits for microplastics from groundwater to the coast.
Beach sediments of the southwest coast of India were analysed to estimate the microplastic contamination with emphasis on the submarine groundwater discharge (SGD) zones. Both SGD and non-SGD sites were assessed for abundance, morphotype and polymer type of microplastics. Microplastic load was 230.429 ± 62.87 particles per 100 g. Fibre, mainly blue, was the abundant morphotype, followed by fragment, foam and film. The polymer types were POLYETHYLENE (PE) (30.77 %), POLYPROPYLENE (PP) (26.92 %), POLYAMIDE (PA) (19.23 %), POLYSTYRENE (PS) (11.54 %), ETHYLENE VINYL ACETATE (EVA) (7.692 %) and POLYVINYL CHLORIDE (PVC) (3.846 %). The SGD zones exhibited higher microplastic contamination with statistically significant variations from non SGD sites. The study accounts the levels of microplastic contamination along the southwest coast of India, a major fishery zone. The higher abundance of microplastic in the SGD zones indicates the significance of subterranean groundwater through flow as a pathway of anthropogenic contaminants towards marine ecosystems.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.