Banten Bay coastal waters continuously receive waste input from anthropogenic activities including heavy metal concentrations, which it has increased and caused accumulation in aquatic biota such as green mussels (Perna viridis) that live in the waters. This study aims to determine the accumulation level of heavy metals Hg, Cd, Pb, and Cu in the green mussels in Banten bay of Bojonegara. Sampling of the green mussel and water quality observation were conducted in the bay for three months from August to October 2020. Analysis of the heavy metals content was conducted using Atomic Absorption Spectrophotometer (AAS) method. Water quality parameters observed in-situ and ex-situ were temperature, transparency, turbidity, TSS, pH, salinity, and DO. Bojonegara coastal water quality was in accordance to the standard quality value. Heavy metals Hg, Cd, Pb, and Cu in the waters were below the quality standards. Heavy metal bioaccumulation Cu in the green mussels in medium to high category, while heavy metals bioaccumulation Hg, Cd, and Pb were in low category. The safety limit for consumption of the green mussels for children (15 kg) was 5.91 kg of meat/week, while for adults (50 kg) was 19.69 kg of meat/week.
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