Analisis Persebaran Besi (Fe) dan Timbal (Pb) pada Air Tanah Dangkal Akibat Lindi di Sekitar Tempat Pemrosesan Akhir (TPA) Tadukan Raga, Kabupaten Deli Serdang

Abstract

The Tadukan Raga Final Disposal Site (TPA), Deli Serdang Regency is operated with a sanitary landfill system. There is already a leachate storage pond and it is suspected that groundwater has been polluted by landfill leachate. One of the hazardous substances usually contained in leachate is lead and iron. There is also a residential area within 200 m radius of the landfill that uses shallow well water as the main water source. The parameters simulated include lead (Pb) and iron (Fe) in two dimensions. The measurement results of iron (Fe) and lead (Pb) contaminants in the Tadukan Raga River water were 0.000512 mg/L and 0.000106 mg/L, and did not exceed the quality standards in PP No. 22 of 2021. Model simulation results show that iron (Fe) and lead (Pb) contaminants have spread as far as ± 100 m from the landfill. Then predictions were made of contaminant concentrations for the next 10 years, 20 years, and 30 years from the operational year of the landfill at a distance of 100 m from the Tadukan Raga landfill. The concentration of iron (Fe) contaminants has increased in the next 10 years, 20 years, and 30 years at a distance of 100 m from the landfill, namely 0.1691 mg/L; 0.238 mg/L, and 0.2608 mg/L. Similarly, lead (Pb) contaminants have increased concentrations in the next 10 years, 20 years, and 30 years at a distance of 100 m from the landfill, namely 0.008271 mg/L; 0.1164 mg/L, and 0.1276 mg/L