Investigation on the methylene blue adsorbability of biomass carbon derived from orange peels

Abstract

This study exposes the low-cost adsorbent with the preparation of nanoparticle carbon from orange peel. The orange peels were subjected to pyrolyze from 700 oC to 900 oC for 5 hours in argon gas. FTIR, Raman, TEM and BET methods characterized the effects of functional groups and surface area of adsorbents. The carbon was used for methylene blue (MB) adsorption from an aqueous solution. Various parameters affecting the adsorption process were investigated, including pH (2 ÷ 10) and initial MB concentration (100 ÷ 300 mg/L). The optimum pH of 4.0 for MB adsorption was obtained. A period of 4 hours was required to reach the equilibrium adsorption of MB. The adsorption process of MB on the carbon from orange peel is consistent with the Langmuir isotherm model.