Distribution of Cromium (Cr) in the Bottom Substrate around Kebintik and Batu Belubang Coastal Waters, Bangka Island

Within the next five years, the post-tin mining coastal waters of Kebintik and Batu Belubang in Central Bangka are expected to run out. Habitats for commercially significant and community-consumed benthos (bivalve class, such as Anadara granosa and Meretrix meretrix) can be found in both coastal seas. Consequently, there are worries regarding the effects of heavy metals (such Cr) from tin mining on marine resources since they build up in the biota, which is eventually ingested by humans. This work uses quantitative descriptive methods and Cr measurement with ICP-EOS to evaluate the concentration and distribution of Cr in sediments surrounding Kebintik and Batu Belubang coastal waters. According to the findings, the sediments in both coastal waterways had Cr concentrations ranging from 0.0210 to 0.044 ppm (the category is still within the quality threshold). The area of post-tin mining tailings pilings at station 6 had the largest dispersion of Cr. The distribution and concentration of heavy metals in the sediments of Kebintik and Batu Belubang's coastal waters are still below the quality standards, meaning that the waters are still suitable for benthic life—which is significant to the local economy and does not pose a health risk to humans—and are therefore generally in good condition.