Studies on Biosorption of Methylene Blue from Aqueous Solutions by Powdered Palm Tree Flower (Borassus flabellifer)

International Journal of Chemical Engineering. 2014;2014 DOI 10.1155/2014/306519


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Journal Title: International Journal of Chemical Engineering

ISSN: 1687-806X (Print); 1687-8078 (Online)

Publisher: Hindawi Limited

LCC Subject Category: Technology: Chemical technology: Chemical engineering

Country of publisher: United Kingdom

Language of fulltext: English

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M. Srinivas Kini (Department of Chemical Engineering, Manipal Institute of Technology, Manipal 576104, India)
M. B. Saidutta (Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal 575025, India)
V. Ramachandra Murty (Department of Biotechnology, Manipal Institute of Technology, Manipal 576104, India)


Blind peer review

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Time From Submission to Publication: 14 weeks


Abstract | Full Text

Biosorption experiments were carried out for the removal of methylene blue (MB) using palm tree male flower (PTMF) as the biosorbent at various pH, temperature, biosorbent, and adsorbate concentration. The optimum pH was found to be 6.0. The kinetic data were fitted in pseudofirst-order and second-order models. The equilibrium data were well-fitted in Langmuir isotherm and the maximum equilibrium capacities of the biosorbent were found to be 143.6, 153,9, 157.3 mg/g at 303, 313, and 323 K, respectively. Thermodynamic data for the adsorption system indicated spontaneous and endothermic process. The enthalpy and entropy values for adsorption were obtained as 15.06 KJ/mol and 0.129 KJ/mol K, respectively, in the temperature range of 303–323 K. A mathematical model for MB transported by molecular diffusion from the bulk of the solution to the surface of PTMF was derived and the values of liquid phase diffusivity and external mass transfer coefficient were estimated.