Pengelolaan air limbah tambang dengan metode bioadsorbsi menggunakan karbon aktif tempurung kelapa

Mine wastewater is formed as the impact of mining activities. One of mine wastewater management methods that has not been studied widely is bioadsorption method using coconut shell activated carbon.This research aims to examine the effect of bioadsorption using coconut shell activated carbon on pH, Fe, Mn and TSS concentrations of mine wastewater. The method used was an experimental one with 2 variables, those were concentrations of active carbon and contact time. The results showed that coconut shell activated carbon by 20% H3PO4 contained 98.20% of carbon, 9.75% of moisture, volatile matter of 20.52%, ash of 10.02% and bound carbon of 69.46%. The optimum increasing pH was obtained at the addition of activated carbon concentration of 5 g/L with the contact time of 10 minutes, the final pH was 7.01. The reduction in Fe and Mn concentration happened by applying 5 g/L activated carbon, with contact time 60 and 20 minutes respectively. The Fe concentration became 0.3570 mg/L and Mn 0.0344 mg/L. The optimal TSS reduction was 0.078 mg/L at the addition of 5 g/L activated carbon and contact time of 20 minutes. The coconut shell activated carbon is proven to be able to increase pH and reduce Fe, Mn and TSS concentrations and can be offered as alternative option as bioadsorption material for mine waste water management.