Isotherm Studies of Adsorption of Methylene Blue by Palm Kernel Shell
Oladokun Benjamen Niran *
University of Abuja, Abuja, Nigeria
Salaudeen Abdulwasiu Olawale
National Mathematical Centre, Sheda-Kwali Abuja, Nigeria
Utam John Ushie
University of Abuja, Abuja, Nigeria
*Author to whom correspondence should be addressed.
Abstract
The main aim of this work is determine the feasibility of palm kernel shell (PKS) with phosphoric acid impregnation to biosorb methylene blue (MB) from aqueous solution by carrying out isotherm studies of the process. The influence of various factors such as contact time, initial dye concentration, adsorbent dosage, pH of dye solution and temperature were investigated in a batch adsorption technique. Result showed that adsorption of methylene blue (MB) dye was favourable at acidic pH. The percentage adsorption was found to increase with time of agitation, temperature, and mass of adsorbent but decreased with increase in initial MB concentration. In order to obtain a suitable model for the MB adsorption process, obtained data were fitted into different isotherm models like Langmuir and Freundlich models. Results showed that Freundlich adsorption isotherm model best describe MB adsorption onto palm kernel shell (PKS).
Keywords: Adsorption, methylene blue, palm kernel shell, isotherm