| Abstract Scope |
Rhodium is one of the platinum group metals widely used for automobile catalysts, in the chemical, electrical, and glass industries. It is the world’s priciest metal and the current price of rhodium is USD 4,650 per troy ounce (ozt). Hydrometallurgical extraction of rhodium is very challenging as it forms strongly hydrated and kinetically inert complexes in aqueous solution. In our research, rhodium was extracted from aqueous chloride media using some commercial ion-exchange resins, such as Sumichelate MC-10 and Diaion WA10/WA21/SA20A/SA21A, as well as bio-based adsorbents such as crosslinked Fe-oxine and Cu(II) -templated chitosans. The results are promising which will be discussed and compared in this paper. Stripping of rhodium from loaded resins/bio-adsorbents was carried out using hydrochloric acid, nitric acid, and sulfuric acid containing some oxidizing agents like H2O2, HNO3, NaClO3 and NaClO where the hydrochloric acid solution containing sodium chlorate (NaClO3) showed the maximum stripping of rhodium. |