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Pollution Characteristics of Microplastics in Mollusks from the Coastal Area of Yantai, China
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Researchers measured microplastic contamination in ten mollusk species collected from the Yantai coastal area of China, finding MPs in all species with bivalves containing more than gastropods and fibers as the dominant type, and estimating human dietary exposure through shellfish consumption.
Microplastic pollution to the marine environment is a global issue. This study investigated microplastic pollution in ten species of different mollusks. Microplastic shape and size were determined under a microscope. Additionally, the polymer types were identified using Fourier transform infrared microspectroscopy (μ-FT-IR). The results showed that the microplastic abundance varied from 0.19 to 1.76 items/g (wet weight) and 4.3 to 36.6 items/individual. Four types of microplastics were observed, including fibers, fragments, films, and pellets. Fibers smaller than 500 μm were the most common. Cellophane (CP) and polyethylene terephthalate (PET) were the main polymer types. The microplastic abundance in the buried bivalve Ruditapes philippinarum demonstrated the highest level of microplastic contamination assessed by wet weight (1.76 ± 0.95 items/g). Furthermore, the Spearman correlation test showed that there was a significant negative correlation between the microplastic abundance calculated by weight and the biometric parameters (shell length, shell height and soft tissue wet weight). Our results will provide valuable information for assessment of the potential health risks of microplastics in China's seafood.
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Researchers measured microplastic abundance and characteristics in three commercially consumed shellfish species from Jiangsu, China, finding MPs in all species with clams containing the highest concentrations and fibers from fishing gear and textiles as the dominant type, estimating annual human intake from shellfish consumption.
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Researchers surveyed microplastic contamination in bivalves such as clams and mussels from the coast of Qingdao, China, and assessed human dietary exposure from eating them. They found an average of about one microplastic particle per individual shellfish, with fibers and rayon being the most common types. The study suggests that regular bivalve consumption in the region contributes to ongoing human microplastic exposure.
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Researchers surveyed microplastic contamination in mussels collected from coastal waters spanning the entire coastline of China. They found microplastics in all samples, with fibers being the dominant type and concentrations varying by region. The study provides the first large-scale baseline data on microplastic pollution in Chinese coastal bivalves, highlighting areas of particular concern and confirming that filter-feeding shellfish are reliable indicators of local microplastic contamination.
Microplastics contamination in bivalves from the Daya Bay: Species variability and spatio-temporal distribution and human health risks
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Researchers assessed microplastic contamination in six species of bivalves from Daya Bay, China, finding microplastics present in 87 to 93% of individuals sampled. Sediment-dwelling bivalves had higher microplastic levels than water-dwelling species, and the types of microplastics found in the shellfish matched those in the surrounding seawater and sediment. A risk assessment based on polymer hazard levels indicated that microplastic contamination in these bivalves may pose health risks to humans who consume them as seafood.
Abundance and characteristics of microplastics in shellfish from Jiaozhou Bay, China
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Researchers measured microplastic abundance and characteristics in wild oysters and farmed clams from Jiaozhou Bay, China, finding contamination at moderate levels. Fibers dominated the microplastic composition in both species. As commercially important shellfish consumed by people, these organisms represent a human dietary exposure pathway for microplastics.
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