Bioconcentration of Plumbum (Lead) and Cadmium on mangrove crab Scylla spp. in mangrove ecosystem Passo Ambon Indonesia

Abstract

Mangrove crab (Scylla spp.) is one of the potential fishery commodities of Maluku Province, which is in high demand because of delicious and nutritious and has selling and export value. This research conducted on the Passo mangrove ecosystems, in May-July 2021. The aims were to analyze the concentration of heavy metals Pb (lead) and Cd (cadmium) in water, sediment and mangrove crabs; and to analyze bioconcentrations and its pollutant categories. Samples of water, sediment and mangrove crabs were taken and captured in the mangrove ecosystems of Passo (Station 1) and at three substations using the purposive sampling method. The treatment of water samples, sediment and mangrove crabs from nature follows the standards of handling samples for analysis of heavy metal concentrations in each medium. The concentration of heavy metals in each medium was analyzed using an Atomic Absorption Spectrophotometer. The results showed that the value of the concentration of Pb in Passo was still at the detection limit; concentrations in sediments have exceeded the detection limit; and the concentration of mangrove crabmeat has exceeded the detection limit. The value of Cd concentrations in water of Passo was still at the limit detection value; concentrations in sediments have exceeded the detection limit; while concentration on mangrove crabmeat was still relatively low but indicated accumulation. Bioconcentration Factor indicates the accumulation of PB and Cd metals was relatively low (<100).