Equilibrium isotherm studies for the sorption of hexavalent chromium (VI) onto groundnut shell
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 12
Abstract
Groundnut shells, a low-cost agricultural waste material were used without any physical or chemical modification as an alternative and cheap adsorbent for the removal of Cr (VI) ion from aqueous solution. The aqueous solutions containing different concentrations of Cr (VI) were treated with fixed doses of groundnut shells powder for an equilibrium time of 90 min. The determination of Chromium (VI) concentration in the sample solutionswas carried out using UV-Vis spectrophotometer by the diphenylcarbazide indicator method. The equilibrium isotherm studies showed that the groundnut shell has a significant capacity for the adsorption of Cr (VI) from aqueous solutions. For the various adsorption isotherm models tested, Tempkin isotherm model showed better representation of the equilibrium data with good correlation coefficient (R2 ) greater than 0.99. The FT-IR results gave an indication of the possible functional groups located on the surface of the groundnut shell. These groups influence the biosorption of Cr (VI) and are likely the mechanism of adsorption, which largely depended on the functional groups present such as alcohols, amines and carboxylic acids.
Authors and Affiliations
Jonas Bayuo, Moses Abdullai Abukari, KennethBayetimani Pelig-Ba
Keywords
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- EP ID EP431713
- DOI 10.9790/5736-1112014046.
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Equilibrium isotherm studies for the sorption of hexavalent chromium (VI) onto groundnut shell
Groundnut shells, a low-cost agricultural waste material were used without any physical or chemical modification as an alternative and cheap adsorbent for the removal of Cr (VI) ion from aqueous solution. The aqueous sol...