Abstract

A. Edwin Vasu

Biosorption of four metal ions, namely, Ni(II), Cu(II), Fe(III) and Cr(VI), has been studied by tamaridus indica fruit shells in batch mode. The sorption processes were found to obey the Redlich-Peterson adsorption isotherm. Kinetic studies performed indicate that the sorptions are better represented by the pseudo-second order kinetic model. It is also observed that the overall rates of the sorptions were governed by particle diffusion constraints at the concentrations of metal ions studied. Thermodynamic studies reveal that the processes are endothermic and the thermodynamic parameters like, DG, DH and DS were evaluated.

Biosorption; metal ions removal; adsorption isotherm; tamarind fruit shell

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