Abstract
Abstract This study examined the possibility of using Macadamia Seed Husks (MSH) as a low-cost sorbent for removal of recalcitrant Basic Blue 3 Dye (BB3). Batch adsorption experiments were performed to evaluate the capability of MSH in the removal of BB3 under varied experimental conditions. The percentage BB3 dye uptake surged with an increase in interaction time, MSH dosage, initial BB3 dye concentration, temperature and pH but significantly dropped with rise in particles size. The sorption equilibrium was attained within 40 min with adsorption efficacy of up to 99.8% at optimum pH 12. Experimental data obeyed the pseudo second order kinetic model with high regression coefficients (R2 > 0.9970) depicting domination of chemisorption. Freundlich adsorption isotherms gave a good fit to the experimental data with high regression coefficient values (R2 = 0.9991) suggesting multiple layer adsorption. The result proves that MSH can be a suitable and efficient alternative in the removal of synthetic dyes from industrial effluents.
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