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Characterization and potential risks of microplastics in marine mollusks using the laser direct infrared (LDIR) technique
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Researchers investigated microplastic contamination in marine mollusks from China's Yantai coastal waters using laser direct infrared imaging. The study found an average of 7.55 particles per gram of soft tissue, with fibers and small particles under 50 micrometers dominating, and carnivorous species showing the highest contamination likely due to biomagnification through the food chain.
Microplastics (MPs) pollution in marine environments is a growing concern, especially where mollusks for human consumption are harvested. This study investigated the contamination and potential risks of MPs in mollusks collected from the Yantai coastal waters using Laser Direct Infrared (LDIR) imaging. The average MPs abundance was 7.55 ± 4.87 items/g (w.w.) in mollusks soft tissues. The carnivorous Buccinum undatum exhibited the highest MP load, likely due to biomagnification. Spearman correlation analysis revealed a negative relationship between MPs abundance and mollusk biological traits, suggesting that larger individuals have lower concentrations. Fibers (52.63 %) and small particles <50 μm (76.19 %) dominated the composition and polyethylene was the most common polymer. The Polymer Hazard Index (PHI) value of 2115 indicated a high risk level (V). The estimated average annual MP intake from mollusk consumption was 24,680 particles/person/year, highlighting potential health concerns. This study provides crucial data for understanding MP pollution in mollusks and its potential risks.
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