Comparative profiling and exposure assessment of microplastics in differently sized Manila clams from South Korea by μFTIR and Nile Red staining
Marine Pollution Bulletin2022
26 citations
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Jaehak Jung,
Maria Krishna de Guzman,
Maria Krishna de Guzman,
Maria Krishna de Guzman,
Maria Krishna de Guzman,
Juyang Kim,
Juyang Kim,
Jaehak Jung,
Jaehak Jung,
Vesna Jovanović,
Vesna Jovanović,
Andreja Rajković,
Andreja Rajković,
Mirjana Andjelković,
Mirjana Andjelković,
Mirjana Andjelković,
Mirjana Andjelković,
Juyang Kim,
Maria Krishna de Guzman,
Mirjana Andjelković,
Andreja Rajković,
Vesna Jovanović,
Andreja Rajković,
Vesna Jovanović,
Maria Krishna de Guzman,
Juyang Kim,
Vesna Jovanović,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Andreja Rajković,
Andreja Rajković,
Vesna Jovanović,
Andreja Rajković,
Vesna Jovanović,
Vesna Jovanović,
Andreja Rajković,
Andreja Rajković,
Andreja Rajković,
Andreja Rajković,
Vesna Jovanović,
Lea Ann Dailey,
Jaehak Jung,
Jaehak Jung,
Jaehak Jung,
Juyang Kim,
Juyang Kim,
Vesna Jovanović,
Tanja Ćirković Veličković
Lea Ann Dailey,
Juyang Kim,
Jaehak Jung,
Maria Krishna de Guzman,
Andreja Rajković,
Jaehak Jung,
Vesna Jovanović,
Lea Ann Dailey,
Lea Ann Dailey,
Juyang Kim,
Jaehak Jung,
Tanja Ćirković Veličković
Juyang Kim,
Andreja Rajković,
Juyang Kim,
Lea Ann Dailey,
Jaehak Jung,
Jaehak Jung,
Jaehak Jung,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Juyang Kim,
Andreja Rajković,
Mirjana Andjelković,
Andreja Rajković,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Lea Ann Dailey,
Mirjana Andjelković,
Mirjana Andjelković,
Tanja Ćirković Veličković
Jaehak Jung,
Juyang Kim,
Tanja Ćirković Veličković
Lea Ann Dailey,
Lea Ann Dailey,
Vesna Jovanović,
Lea Ann Dailey,
Jaehak Jung,
Andreja Rajković,
Lea Ann Dailey,
Vesna Jovanović,
Lea Ann Dailey,
Jaehak Jung,
Jaehak Jung,
Maria Krishna de Guzman,
Andreja Rajković,
Tanja Ćirković Veličković
Maria Krishna de Guzman,
Lea Ann Dailey,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Lea Ann Dailey,
Lea Ann Dailey,
Jaehak Jung,
Bruno De Meulenaer,
Bruno De Meulenaer,
Maria Krishna de Guzman,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Mirjana Andjelković,
Tanja Ćirković Veličković
Andreja Rajković,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Lea Ann Dailey,
Tanja Ćirković Veličković
Tanja Ćirković Veličković
Lea Ann Dailey,
Tanja Ćirković Veličković
Jaehak Jung,
Lea Ann Dailey,
Lea Ann Dailey,
Lea Ann Dailey,
Jaehak Jung,
Tanja Ćirković Veličković
Summary
Researchers compared microplastic contamination in differently sized Manila clams from South Korea using FTIR and Nile Red staining, finding that larger clams accumulated more microplastics and that polymer types varied with clam size and habitat.
The accumulation of microplastics in marine organisms is an emerging concern. Due to trophic transfer, the safety of seafood is under investigation in view of the potential negative effects of microplastics on human health. In this study, market samples of Manila clams (Ruditapes philippinarum) from South Korea were segregated into two groups of considerably different size (p < 0.05), namely small clams with shell length of 40.69 ± 3.97 mm, and large clams of shell length 51.19 ± 2.86 mm. Comparative profiling of the number, size, shape, and polymer type of microplastics were performed using μFTIR imaging and Nile red staining. Overall, μFTIR detected only 1559 microplastics while 1996 microplastics were counted based on staining from 61 Manila clams (30 small and 31 large), leading to an overestimation of 18 to 75 %. Comparable microplastics concentration, based on μFTIR, were observed at 2.70 ± 1.66 MP/g or 15.64 ± 9.25 MP/individual for the small samples, and 3.65 ± 1.59 MP/g or 41.63 ± 16.90 MP/individual for the large ones (p > 0.05). Particle diameters of 20-100 μm was the most dominant, accounting for 44.6 % and 46.5 % of all microplastics from the small and large groups, respectively. Particles, with a circularity (resemblance to a circle) value between 0.6 and 1.0, were the most prevalent, followed by fragments and fibers. At least 50 % of microplastics from the small and large samples were polystyrene, making it the most abundant polymer type. Despite the substantial difference in the size of the animals, only a weak to moderate correlation was observed between microplastics content and the physical attributes of the clams such as shell length and weight, (soft) tissue weight, and total weight (Spearman's coefficient < 0.5). The estimated intake of microplastics by the Korean population was 1232 MP/person/year via small clams, 1663 MP/person/year via large clams, and 1489 MP/person/year via clams independent of size.