Analisa Logam Berat Plumbum (Pb) di Lahan Eks-Konsesi Pt TPL Desa Nagasaribu dengan Metode Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)

Abstract

This study analyzes the heavy metal Lead (Pb) content in two ex-concession lands with different fertilization and spraying activities. In Land I (last activity in 2020), the highest lead concentration was found at Point III (E3) with 34.66 mg/kg, while the lowest was at Point I (E1) with 17.74 mg/kg. In Land II (last activity in 2022), the highest lead concentration was recorded at Point V (B5) with 8.39 mg/kg, whereas the lowest was at Point III (B3) with 4.76 mg/kg. According to Government Regulation No. 101 of 2014, the threshold limit for lead in soil is 0.5 mg/kg. All test results indicate that the soil in both lands has exceeded the lead contamination threshold and requires bioremediation efforts to mitigate environmental pollution.