Removal of chromium (VI) from aqueous solution by using Citrus limetta Peel as an adsorbent

Chromium (VI) is a toxic metal, which is carcinogenic in nature as reported earlier. The Citrus limetta is the family of citrus fruits which is used as an adsorbent in this study. The removal efficiency of chromium (VI) by the Citrus limetta (CL) peel was determined by means of adsorption parameters pH, contact time, initial concentration and adsorbent dosage. From the experimental results, the equilibrium time was found to be 30 minutes for all initial concentration, the percentage removal was found to be maximum in 3g and optimum pH was 2.0. The study was visualized by the most pronounced isotherm models viz., Langmuir and Freundlich isotherm models. The data obtained was best fitted to the Langmuir and Freundlich models. This study was also extended to fit the results with kinetic models viz., pseudo first and pseudo second models. The data obtained were best fit with pseudo second order model with the high degree of correlation coefficient

Author(s): J. Sirajudeen, J. Naveen, S. Arul Manikandan and M. M. Mohamed Mubashir

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