Thorium(IV) sorption on ignited Sarcotragus muscarum, its kinetic and thermodynamic parameters

The uptake of thorium from aqueous systems by ignited Sarcotragus muscarum (L. Schmidt, 1864), collected from Kusadasi Region at Southwest of Turkey as an adsorbent has been investigated. The thorium(IV) uptake was studied as a function of pH, ion concentration and temperature. At the determined optimum conditions, the sorption of thorium on ignited sponge follows a Langmuir-type isotherm. We assumed that this phenomenon can be a sorption process. Kinetic of thorium sorption was investigated at different time intervals at 25, 50 and 70°C. The reaction rate and diffusion constants were calculated for these temperatures. The activation energy and ΔH° were found to be -19.04 and -5.22 J/mol, respectively.