Abstract
This study reviews the preparation of adsorbents, specifically wheat bran, from waste biomass for the adsorption/recovery of Pt(IV) ions from aqueous phase. Herein, the physicochemical characteristics of virgin wheat bran (WB) and WB calcined at 500 °C and 1000 °C (WB500 and WB1000, respectively) were evaluated. Elemental distribution and binding energy analyses confirmed the presence of Pt on the WB sample surfaces after adsorption. The amount of Pt(IV) ions adsorbed was as follows: WB500 (1.1 mg/g) < WB (4.1 mg/g) < WB1000 (27.4 mg/g). The adsorbed Pt(IV) ions were then successfully desorbed from the WB samples using desorption solutions. Notably, WB1000 exhibited adsorption capacities of 6.0, 5.4, and 23.3 mg/g for adsorbing Pt from Pt-containing drugs such as CDDP, CBDCA, and L-OHP, respectively, from aqueous phase. Thus, WB calcined at 1000 °C shows promising properties as an adsorbent for Pt(IV) ion removal/recovery.
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