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Quantification, identification, and chemical characterization of microplastics (MPs) in commercial fishes from the Palk Strait, Southeast India
Summary
Researchers examined microplastics in the tissues and guts of 75 commercially important fish from the Palk Strait in Southeast India, finding an average of 115 particles per individual. Fibers were the most common form at 51%, with polyethylene and polypropylene as the dominant polymers, and particle sizes ranged from 0.1 to 1.0 millimeters. The presence of microplastics in edible fish tissues suggests a potential route of human exposure through seafood consumption.
Abstract The present study examined the quantification, identification, and their characterization of microplastics (MPs) in the tissues and guts of commercially important fishes from the Palk Strait, Southeast India. A total of 75 specimens representing 10 species were collected from local landing centres. Morphological characterization of MPs, including size, colour, and shape, was performed using a stereomicroscope. In total, 115 MPs/ind. were recorded, with fibres being the predominant type (51 %), followed by fragments (29 %) and films (20 %). The MPs detected ranged in size from 0.1 to 1.0 mm. Fish guts and tissues had mostly black (47%), blue (22%), and colourless (20%) MPs, while green, violet, and red were less common. Fourier-transform infrared spectroscopy (FTIR) analysis identified polyethylene (PE) and polypropylene (PP) as the main polymers. The presence of MPs in edible fish tissues suggests their possible entry into the human body via seafood consumption, underscoring the necessity for comprehensive risk assessment.