Orange Peel-Facilitated Adsorption of Methylene Blue Dye

The current studies deal with the use of low-cost orange peels as an adsorbent for the removal of methylene blue from aqueous solution in the batch adsorption experiment in the laboratory. The adsorption of methylene blue dye on an orange peel was examined on the basis of different parameters such as dye concentration, quantity of adsorbent, particle size of orange peel, pH, and contact time between adsorbent and adsorbate. Also, effects of these parameters on adsorption were studied. The adsorption was favorable for acidic pH. Maximum adsorption takes place at pH 6. Also, the removal efficiency increases with adsorbent dosage. Adsorbent dosage of 0.5 g shows considerable dye removal. Dye color removal rate increases with increase in contact time between adsorbent and adsorbate. The Langmuir model fits better to the adsorption equilibrium data. The adsorption capacity of orange peel is quite low. Orange peel can be used as a substitute for expensive adsorbent as it is a cheap and bio adsorbent.