Kinetic and equilibrium studies for U(VI) and Cd(II) sorption from commercial phosphoric acid using C100H resin

The present work aims to uranium and cadmium ions sorption from commercial di-hydrate phosphoric acid using commercial cation exchange resin, C100H. The influence of main factors such as shaking time, sorbent dose, and phosphoric acid molarity have been investigated to figure out the sorption characteristics of C100H resin. The displayed results declare the applied cation exchange resin have high tendency for U(VI) and Cd(II) sorption from crude phosphoric acid whereas about 95.8% and 82.5% of uranium and cadmium ions respectively were removed successfully from phosphoric acid. The kinetic and isotherm of the sorption process show that U(VI) and Cd(II) sorption obey the pseudo-second order kinetic model and Langmuir isotherm model. The sorption capacity of C100H resin for U(VI) and Cd(II) ions were 14.6 and 3.3 mg/g. The desorption of U(VI) and Cd(II) from loaded resin were performed and the resin exhibit high stability for 6 sorption/desorption cycles.

Automated summary

The study demonstrates that the commercial cation exchange resin C100H has high affinity for uranium and cadmium ions in commercial di-hydrate phosphoric acid, removing approximately 95.8% and 82.5% of the ions, respectively. The sorption process follows the pseudo-second order kinetic model and Langmuir isotherm model, with the sorption capacities of C100H resin for U(VI) and Cd(II) ions being 14.6 and 3.3 mg/g, respectively. The resin shows high stability for 6 sorption/desorption cycles.