Industrial Liquid Discharge Treatment with Activated Carbon (Cap) Produced from Cocoa Pod Husk in Kampung Batik Laweyan Surakarta

Abstract

The unit in the Kampung Batik Laweyan industrial area discharge significant quantities of liquid (industrial) discharge containing solvents, heavy metals, and suspended solids that are discharged into the sewerage system and/or the receiving environment without adequate treatment. Cocoa pod husk is a natural adsorbent and its existence is abundant in Surakarta, is cost effective. The use of powdered activated carbon (CAP) makes it possible to considerably reduce the concentrations of heavy metal pollutants contained in the effluents by its optimum adsorption capacity. The aim of this investigation is to study the adsorption of heavy metal (Cd) with CAP from coccoa pod husk. Activated carbon was prepared from cocoa pod husk, carbonized at 100°C in a muffle furnace for 4 hour and activated with 0.5 M NaOH by reflux method until 60°C for 24 hour. The resultant products were tested to adsorb the heavy metals in effluent water at varying contact time. The adsorption capacity and metal removal percentage was computed and recorded at the various varying parameters in the study; while the reaction attained equilibrium in 160 minutes contact time. The maximum Cd removal efficiency was 41,2% at a contact time of 100 minutes, Functional groups involved in biosorption of Ni (II) ions by coccoa pod husk (Theobroma cacao) is a group -OH and N-H. which reflects the importance of use of activated carbon in the treatment of industrial liquid discharges, including various treatment of batik industrial liquid discharge.