Acid Mine Drainage (AMD) is generated from mining activities, one of which is coal mining. The process of AMD formation is caused by the oxidation of sulfide minerals containing sulfur accompanied by the presence of water. The content of heavy metals in AMD such as Fe and Mn in high concentrations can have a serious impact on the environment and the safety of living things. To overcome this impact, treatment is necessary. This treatment aims to optimize the discharge of AMD to the environment by meeting quality standards in accordance with established environmental regulations. The procedure used in this treatment is done by compositing coal activated carbon and zeolite synthesis, then mixing it into 200 ml of artificial AMD at 5 variations of different initial concentrations of Fe and Mn metals with 2 grams of activated carbon and zeolite composite for 90 minutes. In the processing using activated carbon and zeolite composite, the largest concentration reduction was obtained at the initial concentration of Fe metal 9.11 mg/L to 0.17 mg/L with 98.13% adsorption of Fe metal and the initial concentration of Mn metal 8.74 mg/L to 0.0001 mg/L with 99.99% adsorption of Mn metal. This shows that Fe and Mn metals in artificial AMD are adsorbed into the pores of the composite in large quantities, so as to reduce the concentration of Fe and Mn metals. The higher the initial concentration value, the lower the percent adsorption and adsorption ability of activated carbon.
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