Indian Journal of Advances in Chemical Science Volume: 6, Issue 3: , August 2018

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2018.603008

Research Article

Adsorption of Methyl Orange on Syzygium cumini Seed Powder: Kinetics, Isotherms, and Thermodynamic Studies

Karuna Devi Rachapudi, Jaya Malathi Jagadeeson, Raja Kumar Challagundla,
Sreeramulu Dasari, Vijaya Yarramuthi*

ABSTRACT

Present research discussed the utilization of Syzygium cumini seed powder (SCSP) as an adsorbent for methyl orange (MO) removal from aqueous solution. Batch adsorption experiments were carried out to evaluate the influence of pH, adsorbent dosage, contact time, initial dye concentration, and temperature. Langmuir and Freundlich isotherm models were employed to describe the adsorption of the MO by SCSP. The equilibrium data was better fitted by Langmuir isotherm model than the Freundlich model. The maximum monolayer adsorption capacity of MO onto SCSP was found to be 63.3 mg/g. The pseudo first-order and pseudo second-order model equations were used to analyze the kinetic data of the adsorption process, and the data were fitted well with the pseudo second-order kinetic model. The thermodynamic parameters (ΔGo, ΔHo, and ΔSo) showed that the adsorption of MO onto SCSP was endothermic and spontaneous. Results in this study suggested that SCSP was a suitable material for the removal of MO from aqueous solution.

Key words: Adsorption, Methyl orange, Kinetics, Isotherms, Thermodynamics.

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