Adsorption of Methylene Blue from Aqueous Solution using Microwave-Assisted BaCl2 Modified Activated Carbon Produced from Mango Seed Shell
Ajani, Ayobami Olu1, Dada, Ebenezer Olujimi1, Olu-arotiowa, Olusesan Abel1, Okeowo, Idris Olanrewaju1,2; Alade, Abass Olanrewaju1,2,3, Afolabi, Tinuade Jolade1,2
1 Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
2 Bioenvironmental, Water and Engineering Research Group (BWERG), Ladoke Akintola University of Technology, Ogbomoso, Nigeria
3 Science and Engineering Research Group (SAERG), Ladoke Akintola University of Technology Ogbomoso, Nigeria
Corresponding Author: aoalade@lautech.edu.ng +2347037885061
DOI: 10.36108/laujoces/9102/20(0270)
Abstract
The presence of methylene blue (MB) in wastewater is a major concern in the environment due to its low biodegradability and harmful effect on man. The adsorption of MB from aqueous solution onto activated carbon (AC) prepared from mango seed shells sourced locally in Ogbomoso Township was investigated in this study. The AC was prepared from mango seed shell by activating with BaCl2 at impregnation ratio I.R (1:2 w/w), microwave frequency (600 Hz), and time (30 min) before being carbonized at 500 °C for 20 min. Batch adsorption experiment was carried out at 25 °C to study the effect of contact time and initial dye concentration on MB adsorption. The equilibrium kinetics and adsorption mechanism were investigated. The pseudo first order, high correlation coefficients, R, (0.9491 and 0.9907) for initial concentrations of 10 and 15 mg/L, respectively, was very suitable to describe the kinetic characteristics of the MB adsorption on to mango seed shell activated carbon, Weber and Morris intra-particle model with R of 0.9907, is very fit to describe the diffusion mechanism of the adsorption process. The result implied that mango seed shell was suitable as an adsorbent material for adsorption of MB.
Keywords: Activated carbon, Mango seed shell, Methylene blue, Optimization