Libro

Descripción

Modification of the present SD to obtain a stable SDSB adsorbent using an inexpensive method was carried out to be used as an adsorbent for yttrium recovery. pH, sorbent concentration, contact time, and initial metal ion concentration all influenced the uptake of Y(III) ions on SDSB, according to the observations. The optimal adsorption conditions for the Y(III) ions were aqueous pH 5.0, metal ion concentration of 0.56 mmol L-1, and stirring times of 90 minutes. SDSB adsorbent succeeded in yttrium adsorption from nitrate feed solution with the uptake capacity of 0.9 mmol g-1  adsorbent at ambient temperature reached to 1.08 mmol g-1 at 55oC. Characterization of the loaded adsorbent using FT-IR proved the yttrium adsorption upon the SDSB adsorbent. The equilibrium adsorption results were studied using Langmuir and Freundlich isotherm models; these models elucidated the sorption process and provided an understanding of the sorption mechanism. The adsorption reaction was found to follow the PSO kinetics and the calculated adsorbate in the adsorbent at equilibrium fitted well with the experimental results (R2 of 0.999). Thermodynamic parameters data indicated that the adsorption process has an endothermic nature and the adsorption process was more favorable at high temperatures. The ability of the studied adsorbent to recover Y(III) ions from laboratory waste solution was confirmed, as SDSB succeeded in the preconcentration step of Y(III) ions  with relatively few other elements, which indicates the efficiency of its use in the treatment processes of these solutions.