<![CDATA[Reclamation of ex-coal mining land with oil palm (Elaeis guineensis) is widely practiced in South Kalimantan, but the resulting lead (Pb) status of the soil is rarely quantified. This study analyzed Pb concentrations in reclaimed ex-mining soil planted with oil palm at PT. Amanah Batu Alam Persada, Banjar Regency, Indonesia, and assessed them against environmental quality standards. Composite topsoil (0–30 cm) was sampled under a bare control and oil palm stands following a completely randomized design (four treatments, five replicates, n = 20). Pb was determined by ICP-OES, with soil pH (H2O) and electrical conductivity (EC) as supporting parameters governing Pb mobility. Soil Pb ranged from 2.870 to 5.918 mg/kg, with the bare control showing the highest concentration (5.918 mg/kg). All values were far below the 300 mg/kg hazardous-waste threshold (category TK-C) of Government Regulation No. 22/2021, indicating the reclaimed soil is not classified as B3-contaminated and is safe for revegetation. The presence of oil palm was associated with lower soil Pb and with modified rhizosphere chemistry — pH declined from 6.456 to 4.462 and EC from 0.306 to 0.044 mS/cm — conditions that enhance Pb solubility and bioavailability and support phytoremediation. These findings confirm that oil palm reclamation keeps soil Pb within safe limits while actively reshaping the chemical environment that controls Pb behavior.]]>
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