KINETICS AND EQUILIBRIUM STUDY OF CHROMIUM ADSORPTION ON ZEOLITENAX

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PANDEY P.K.; SHARMA S.K.; SAMBI S.S.

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Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST) Year:2010 | Volume:7 | Issue:2 (26) Page(s): 395-404

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Title

KINETICS AND EQUILIBRIUM STUDY OF CHROMIUM ADSORPTION ON ZEOLITENAX

Author(s)

PANDEY P.K. | SHARMA S.K. | SAMBI S.S. | Issue Writer Certificate

Keywords

DIFFUSION

FIRST ORDER REVERSIBLE REACTION

ISOTHERM

MASS TRANSFER

REGENERATION

THERMODYNAMICS

Abstract

This study aims to report Batch adsorption study of hexavalent chromium, Cr (VI) on zeoliteNaX. Kinetics of Cr (VI) adsorption and adsorption ISOTHERMs were determined by varying operating parameters such as pH, initial concentration, temperature and contact time. ZeoliteNaX was found to remove Cr (VI) in acidic solutions down to ppm level at pH of about 4. Removal rate of Cr (VI) was found to decrease as pH rises above 4.0. Langmuir, Freundlich, Temkin and Redlich-Peterson models were applied to adsorption equilibrium data to find the best amongst these models. Langmuir model with R2 = 0.9711 best fits the adsorption data. The kinetics of adsorption was found to follow the FIRST ORDER REVERSIBLE REACTION. The separation parameter, RL values of less than 1.0 i.e., 0.7369, 0.5834 and 0.4828 corresponding to initial concentrations of 10, 20 and 30 mg/L, respectively indicated that adsorption of Cr (VI) on zeoliteNaX is favoured. The estimated values of thermodynamic parameters such as heat of adsorption and standard gibbs free energy confirmed the exothermic nature of adsorption of Cr (VI) on zeoliteNaX.

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APA: Copy

PANDEY, P.K., SHARMA, S.K., & SAMBI, S.S.. (2010). KINETICS AND EQUILIBRIUM STUDY OF CHROMIUM ADSORPTION ON ZEOLITENAX. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 7(2 (26)), 395-404. SID. https://sid.ir/paper/285229/en

Vancouver: Copy

PANDEY P.K., SHARMA S.K., SAMBI S.S.. KINETICS AND EQUILIBRIUM STUDY OF CHROMIUM ADSORPTION ON ZEOLITENAX. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2010;7(2 (26)):395-404. Available from: https://sid.ir/paper/285229/en

IEEE: Copy

P.K. PANDEY, S.K. SHARMA, and S.S. SAMBI, “KINETICS AND EQUILIBRIUM STUDY OF CHROMIUM ADSORPTION ON ZEOLITENAX,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 7, no. 2 (26), pp. 395–404, 2010, [Online]. Available: https://sid.ir/paper/285229/en

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