• Biswajit Das

The main objective of the study is to investigate the adsorption of chromium (VI) from aqueous solution by Litchi Seed Powder (LSP) by equilibrium and thermodynamic studies. The effect of initial chromium (VI) concentration, pH, bio adsorbent dose and contact time have been studied. Maximum chromium (VI) removal occurred at pH: 2, LSP dose: 1.5 g/50 mL, contact time: 60 minutes and initial concentration of 10 mg/L. Maximum adsorption capacity was found to be 1.053 mg/g. Freundlich isotherm model fitted well than the other models. The adsorption was physical. Chromium (VI) removal by LSP was spontaneous and endothermic. So was found to be 65.1002 KJ/mol.

Equilibrium, Thermodynamic, Freundlich, spontaneous

" USE OF LITCHI (Litchi Chinensis) SEED POWDER AS AN EFFECTIVE ADSORBENT TOWARDS CHROMIUM (VI) REMOVAL FROM AQUEOUS SOLUTION: EQUILIBRIUM AND THERMODYNAMIC STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.221-228, April-2019, Available :http://www.jetir.org/papers/JETIR1904U84.pdf

" USE OF LITCHI (Litchi Chinensis) SEED POWDER AS AN EFFECTIVE ADSORBENT TOWARDS CHROMIUM (VI) REMOVAL FROM AQUEOUS SOLUTION: EQUILIBRIUM AND THERMODYNAMIC STUDY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp221-228, April-2019, Available at : http://www.jetir.org/papers/JETIR1904U84.pdf