ACTIVE TREATMENT SIMULATION OF ACID MINE DRAINAGE IN LABORATORY BY USING QUICKLIME

• Main Author: Satria Agung, Windhy
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/47285
• Institution: Institut Teknologi Bandung

Active treatment system is one of the methods used in Acid Mine Water Treatment (AAT). AAT Processing Costs are large enough to be applied in the field. Prediction through software simulation is one of the right steps in handling AAT. The software used in this simulation is PHREEQC. The purpose of this study was to determine the CaO dose in the PHREEQC simulation, to determine the ideal dosage that met the quality standard parameters, and to see an increase in pH of the main species namely Fe and Mn. The methodology in this research is experimental research. Data collection was carried out directly through testing and testing the comparison of pH to the amount of dissolved metal with PHREEQC software. The results showed that the number of main species dissolved in Fe and Mn still existed after the PHREEQC experiment was carried out in a relatively small amount. In this research, there was a change in the amount of Fe and Mn as a result of measuring the increase in pH through modeling the results of the PHREEQC simulation. Based on the PHREEQC simulation, the main species of dissolved metal Fe and Mn were dissolved after processing by giving a dose of 500 ppm of lime (CaO). A dose of 500 ppm CaO caused the pH of the AAT pit Z sample to rise from 2.73 to pH 6.52. The levels of the main metal Fe species were dissolved at pH 6.52, namely Fe2+ from 1,55 x 10-2 M to 1,36 x 10-2 M, the content of dissolved metal Fe3+ from 3,29 x 10-11 M goes up to 6,93 x 10-13M, Fe(OH)+ from 1,68 x 10-6 M goes up to 8,74 x 10-6 M, and Fe(OH)2+ starts from 6,38 x 10-11 M increased to 7,98 x 10-09 M, Fe (OH)2 + starting from 6,78 x 10-12 M increased to 4,99 x 10-6 M when the main species of Mn which is still dissolved after the pH reaches 6.52, i.e. Mn2+ starting from 5,08 x 10-3 M, starts to rapidly increase to 4,48 x 10-3 M.