DECREASE LEVELS OF IRON (Fe) AND MANGANESE (Mn) IN ACID MINING WATER USING ACTIVE CARBON OF EGG SHELL

Acid mine drainage is acidic water that arises as a result of mining activities. Acidic has high acidity, which often characterized by low pH and contains levels heavy metals Fe Mn. The purpose this study was to determine the effect activated carbon on adsorption process mass eggshells. method used in research using eggshell physically chemically activated. This variation 5, 10, 15 20 grams with contact time 30 minutes an adsorbent size 200 mesh. parameters studied were iron (Fe) manganese (Mn). initial concentration acid waste 29.179 mg/L, Mn 7.9692 mg/L. results showed had decreasing metals. On physical activation average decrease metal 99.50% 53.21%, while chemical 97.72% 97.97%.Keywords: water, Fe, Mn, Activated carbon, egg shell