Title:
Influence of Rice Husk Carbon Activation on the Adsorption Process of Fe and Mn Metals from Coal Wastewater

Authors:
Marhaini*, Dewi Fernianti, Rizqina Syalsabila, Indonesia

Abstract:

Liquid waste is the most common type of waste compared to solid or gas waste. The most significant issue with liquid waste is the liquid waste originating from coal washing, which can decrease the acidity level (pH) and increase the total suspended solids (TSS), Iron (Fe2+), and Manganese (Mn²⁺) content. In this study, activated carbon adsorbents were produced from rice husk material. The research aims to obtain data on the characteristic quality of activated carbon made from rice husk with different concentrations of ZnCl₂ activator substance, to acquire data on the effectiveness of activated carbon, and to obtain data on the levels of Iron (Fe²⁺) and Manganese (Mn²⁺), TSS, and pH after the adsorption process. This research was conducted through several stages, including raw material preparation, carbonization, activation, and absorption of coal liquid waste content. Based on the research results, activated carbon from rice husk with a 15% ZnCl₂ activator concentration using heating method and a 15% ZnCl₂ activator concentration using soaking method, the initial TSS value of 911 mg/L decreased to 527 mg/L with a 15% ZnCl₂ activator concentration using heating method and 613 mg/L with a 15% activator concentration using soaking method. The Iron (Fe²⁺) content decreased from 0.71 mg/L to 0.01 mg/L with a 15% activator concentration using heating method and 0.07 mg/L with a 15% activator concentration using soaking method. The Manganese (Mn²⁺) content decreased from 0.63 mg/L to 0.15 mg/L with a 15% activator concentration using heating method and 0.08 mg/L with a 15% activator concentration using soaking method. The pH level increased from 6.56 to 7.36 with a 15% activator concentration using heating method and 7.24 with a 15% activator concentration using soaking method.

DOI: http://dx.doi.org/10.51505/ijaemr.2024.9601