Distribution of Pb and Fe heavy metal contamination in sea water and sediment in Bangkalan Madura Sea Waters

Abstract

The high level of industrial and port activity in Surabaya and Gresik causes the potential for heavy metal waste pollution in Bangkalan sea waters. Heavy metal pollution will accumulate in several marine biota. If humans consume contaminated biota, the heavy metal content will accumulate in the body's organs causing mild to severe illnesses. Sea water in Bangkalan waters is also used as raw water for shrimp cultivation and salt production, so it needs to meet water quality standards. The research was conducted in 4 locations determined using the random purposive sampling method. Each location requires one seawater and sediment sample each. Each sample will be tested using a Flame Atomic Absorption Spectrophotometry (AAS) instrument to determine the concentration of Pb and Fe. From the results of laboratory tests it is known that St.1 (Modung Coast), contains the highest Pb and Fe contamination values in sea water and marine sediment, where the Pb value = 0.04 ppm and Fe = 0.1 ppm, for marine sediment the Pb value = 4.25 ppm and Fe = 0.38 ppm. Then proceed to determine the contamination distribution coefficient (Kd). The highest value is at St.4 (Tajungan-Kamal) where Kd Pb = 149.78, and Kd Fe = 7.94. The next step is modeling visualization to determine the distribution of pollution using a color gradient scale.