The Study of Improving Acid Mine Water Quality by Manganese Greensand and Activated Carbon Filtration

Abstract

Bangka Belitung is one of the provinces in Indonesia known as a tin-producing area. Illegal tin mining results in excavated holes. The characteristics of the water in the ex-mining pits are acidic and contain heavy metals such as iron. This journal aims to determine the effect of filtration in improving the quality of water samples and determining the best doses of Na2CO3 and KMnO4 as pre-treatment. Also, to find out which experiment resulted in higher Fe removal efficiency and whether the quality of the treated water complies with the Regulation of the Minister of Health Number 492 of 2010. This study used primary data of pH and iron content as dependent variables. The population of this research is Alang Lake water taken by random sampling method. The experiment was conducted on a lab scale with two independent variables, sampled with replicates every 30 minutes. In this experiment, the optimum doses of Na2CO3 and KMnO4 were 300 mg/L and 0.75 mg/L, respectively. The treated water has a pH value of 7.4-8.1, iron concentration <0.25 mg/L with a removal efficiency of 93.56%, and turbidity of 0.05-0.75 NTU. Thus, it can be said the dependent variables are following the relevant regulations.