REDUCTION OF SULFATE CONCENTRATION IN COAL MINING WATER USING BATCH ELECTROCOAGULATION WITH ALUMINUM ELECTRODES

• Main Author: Wajdi, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/81029
• Institution: Institut Teknologi Bandung

This study investigates the efficacy of the electrocoagulation process using aluminum electrodes for reducing the initial sulfate concentration of 2239 mg/l in coal mining water. Variables such as current intensity (0.5, 1, and 2 amperes) and contact time (15, 30, and 45 minutes) were examined. The highest removal efficiency of 50% was achieved at 2 amperes and 45 minutes, which also increased the pH from 3.25 to 10.125. This process demonstrated a decrease in electrical conductivity and Total Dissolved Solids (TDS), indicating a reduction in ionic content and dissolved solids. The findings confirm that increasing current intensity and contact time enhances sulfate removal efficiency through the formation of Al(OH)3 coagulants, underscoring the importance of optimizing electrocoagulation parameters for effective coal mining water treatment.