OPTIMIZATION OF ACTIVATED CARBON FROM COCOA POD HUSK FOR METHYLENE BLUE ADSORPTION WITH RESPONSE SURFACE METHODOLOGYt Yusuf Hendrawan (a*), Kezia Millenia Jusuf (a), Shinta Rosalia Dewi (a), Dimas Firmanda Al Riza (a)
a) Department of Biosystems Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Jl. Veteran - Malang, ZIP 65145, Indonesia
*yusuf_h[at]ub.ac.id
Abstract
The purpose of this study was to model the interaction between activation temperature and concentration of activated carbon activator on methylene blue absorption using response surface methodology and determine the optimal point of temperature variables and activated carbon activator concentration to maximize methylene blue absorption number. Cocoa pod husk is used as activated carbon material. Activation temperature variation (X) ranged from 600 C to 800 C. NaOH activator concentration (Y) ranged from 2% to 3%. The results showed the best model was quadratic. The optimum solution obtained was an activation temperature of 717.943 C and a NaOH concentration of 2.448%, with a predicted methylene blue number of 262.427 mg/g. The actual results showed a methylene blue number of 262.807 mg/g, with a p value of 0.162 (p > 0.05).
Keywords: activated carbon- cocoa pod husk- response surface methodology- optimization
