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ISSN Print: 2381-1234 ISSN Online: 2381-1242

AASCIT Journal of Nanoscience

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Equilibrium, Isotherms and Kinetics Studies of Removal of Methylene Blue on Montmorillonite-Silica Nanocomposite

AASCIT Journal of Nanoscience
Vol.4 , No. 1, Publication Date: Feb. 27, 2018, Page: 8-13

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Authors

[1]	Shehu Zaccheus, Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.
[2]	Danbature Wilson Lamayi, Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.
[3]	Kambel Dogara Rifkatu, Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.
[4]	Ayuba Linda, Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.

Abstract

Montmorillonite-silica nanocompsite synthesized from locally available materials obtained from rice husk and montmorillonite clay is used as an adsorbent in the removal of methylene blue dye from aqueous solution. Batch adsorption method was employed in this study where the influential parameters studied were adsorbent dose, initial concentration and contact time at the optimum conditions; 0.5g, 3 mg and 20 minutes respectively at room temperature. The maximum percentage removal obtained from the adsorption processes was 99.30%. The isotherms results obtained for Langmuir isotherm was R² = 0.7656 and Freudlich; R² = 0.1568. From the above, it is obvious and certain that the Langmuir isotherm best fit the adsorption process carried out in this study. The R_L =0.982 indicates that the adsorption process was favourable since the value is close to one and the maximum adsorption capacity obtained was found to be q_max = 58.82 using the Langmuir isotherm. The kinetic study was employed using the pseudo-first order and the pseudo-second order kinetics. The obtained results show that the pseudo-second order best fit the adsorption process with the correlation factor R² = 0.9018. Form the above results, montmorillonite-silica nanocomposite, can be used as cost effective adsorbent in the adsorptive removal of methylene blue dye from aqueous solution.

Keywords

Methylene Blue, Adsoption, Kinetics, Isotherms and Montmorillonite-Silica Nanocomposite

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