Original Research Article
Year: 2015 | Month: December | Volume: 2 | Issue: 12 | Pages: 714-722
Adsorption Studies of Methylene Blue on Gypsum
Md. Masudur Rahman, Ayesha Siddiqua, Mohammad Abul Hasnat
Department of Chemistry, Graduate School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh.
Corresponding Author: Md. Masudur Rahman
ABSTRACT
To remove a cationic dye Methylene Blue from aqueous solution, Gypsum was investigated as an economical and efficient adsorbent. Batch kinetics and isotherm studies were carried out under varying experimental conditions of contact time, initial methylene blue concentration, adsorbent dosage and pH at room temperature. The nature of the possible Gypsum adsorbent and Methylene blue interactions was examined by the FTIR technique. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The adsorption isotherm data were fitted well to the Langmuir isotherm and the monolayer adsorption capacity was found to be 0.5339 mg/g at 25 0C. The data were also studied in terms of their kinetic behavior and was found to obey the first order equation.
Keywords: Adsorption, gypsum, adsorbent, methylene blue, dye, kinetics, isotherm.