Removal of Methylene Blue from Aqueous Solution Using Cotton Stalk: As a Bioadsorbent

摘要

A batch adsorption system using cotton stalk as a bioadsorbent was investigated to remove methylene blue from aqueous solution. The system variables studied include adsorbent particle size, initial dye concentration and adsorbent dose. Based on the isotherm data obtained from the fittings of the adsorption kinetics, the Freundlich model (Regression coefficient R ≈ 0.99) appears to fit the adsorption better than the Langmuir model (Regression coefficient R ≈ 0.89). The Freundlich and Langmuir monolayer capacity had a mean values of 1.29 l/g and 1.054 mg/g, respectively.