International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Kinetic and thermodynamic of adsorption of methylene blue (MB) by CuFe2O4/rice bran composite

Saeedeh Hashemian
Department of Chemistry, Islamic Azad University, Yazd Branch, Yazd, Iran.
Email: [email protected]

  •  Accepted: 02 September 2011
  •  Published: 02 November 2011



The adsorption of methylene blue (MB) dye onto activated rice bran and CuFe2O4/rice bran (CRB) composite was investigated. Activated rice bran was prepared by treating with NaCl. The CuFe2O4/rice bran was prepared by chemical co-precipitation method. The adsorbents were characterized by XRD and SEM analyses. The adsorption of MB was strongly dependent on the pH (pH 12). The process was very fast initially and maximum adsorption was attained within 60 min of contact time. The specific surface area (BET method) of rice bran, activated rice bran and CuFe2O4/ rice bran were 0.44, 35 and 68 m2g−1, respectively. The adsorption isothermal data could be well interpreted by the Langmuir isotherm model. The adsorption process follows pseudo second-order kinetics and rate constant 0.112 for ARB and 0.17 for CRB (g mg-1 min-1). Thermodynamic parameters were evaluated.


Key words: Adsorption, composite, methylene blue, kinetic, rice bran.