Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 164, Issue 1, Pages 172-181Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2008.07.155
Keywords
Adsorption; Hazelnut shell; Methylene blue; Kinetic; Mechanism and activation parameters
Categories
Ask authors/readers for more resources
The adsorption kinetics of methylene blue (MB) on the hazelnut shell with respect to the initial dye concentration, pH, ionic strength, particle size and temperature were investigated. The rate and the transport/kinetic processes of MB adsorption were described by applying the first-order Lagergren, the pseudo-second-order. mass transfer coefficient and the intraparticle diffusion models. Kinetic studies showed that the kinetic data were well described by the pseudo-second-order kinetic model. Significant increases in initial adsorption rate were observed with the increase in temperature followed by pH and initial MB concentration. The intraparticle diffusion was found to be the rate-limiting step in the adsorption process. Adsorption activation energy was calculated to be 45.6 kJ mol(-1). The values of activation parameters such as free energy (Delta G(center dot)), enthalpy (Delta H-center dot) and entropy (Delta S-center dot) were also determined as 83.4 kJ mol(-1), 42.9 kJ mol(-1) and -133.5 J mol(-1) K-1, respectively. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available