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Correlation of metals and degraded marine (micro)plastic litter in geologically similar coastal areas with different anthropogenic characteristics
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Researchers assessed trace metal concentrations adsorbed on degraded marine microplastics collected from two Croatian Adriatic coastal sites -- an estuarine and an open coastal location -- finding that polystyrene adsorbed the highest metal loads in the order Zn > Pb approximately equal to Cu > Cd, with the more anthropogenically influenced estuary showing overall higher metal contamination on plastic debris.
The association and statistical correlation of anthropogenically important trace metals (TM) Cd, Cu, Pb, Zn and degraded marine microplastic (MP) extracted from the bulk debris samples at two locations from two marine systems, estuarine and coastal, in the Croatian Adriatic coastal area were assessed. The abundance of MP particles at both sites were primarily defined by local wave climate, with the open coastal site containing 9-fold more microplastic particles (>4 mm) as compared to the semi-closed estuarine, or twice as much considering bulk plastics. Generally, the higher abundance of adsorbed metal on MP were observed in the more anthropogenically influenced estuary than in the open coastal site and followed the order: polystyrene > polypropylene > low density polyethylene. The amounts of adsorbed zinc were the highest on all types of plastics at both sites, while the affinity of polystyrene for metals followed: Zn > Pb ≈ Cu > Cd.
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Researchers measured trace metal concentrations (cadmium, copper, lead, zinc) on beached microplastic particles from a Croatian Adriatic coast estuary, finding that metal loading varied by particle size and type. Smaller microplastics accumulated higher metal concentrations per unit mass, suggesting that as plastics fragment they become increasingly contaminated with toxic metals.
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Researchers determined trace metal concentrations on microplastic particles and in seawater from a Croatian Adriatic beach, finding measurable accumulation of zinc, cadmium, lead, and copper on plastic surfaces. The results confirm that microplastics in coastal sediments can concentrate heavy metals to levels above surrounding water concentrations.
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This Croatian thesis measured trace metal concentrations in seawater and on microplastic particles from beach sediments at Mala Martinska near Sibenik, finding that microplastics adsorbed zinc, cadmium, lead, and copper from the surrounding marine environment. The study demonstrates that coastal microplastics act as concentrators of toxic metals in Adriatic beach sediments.
Levels of trace metals on microplastic particles in beach sediments of the island of Vis, Adriatic Sea, Croatia
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Plastic pellets from two beaches on the Croatian island of Vis were analyzed for eight trace metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn), finding concentrations substantially higher than reported ambient seawater values, indicating active metal sorption from the marine environment. The study provides evidence that Adriatic Sea plastic pellets accumulate trace metals at levels that could be transferred to marine organisms upon ingestion.
Correlation of microplastic type and metal association: Croatian coast case study (Žirje Island)
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This Croatian coast study found that weathered beach microplastics were associated with metals including cadmium, lead, zinc, and copper. Microplastics can accumulate and transport heavy metals in the ocean, potentially increasing exposure risks for marine organisms and seafood consumers.
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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.