Extraction of Rare Earth Elements from Industrial Waste using Natural Clinoptilolite
Mohamed M. Fawzy Mohamed S. Atrees, Saleh El Hady
For extracting of rare earth elements (REE) from the industrial wastes, adsorption process is applied. Natural clinoptilolite was thermally treated and used as an adsorbent for the removal of REE from byproducts residue of phosphoric acid industry (Sample-I) as well as Abu-Rusheid Project (Sample-II) in Egyptian Nuclear Materials Authority. The factors affected the adsorption process were studied such as; effect of time, temperature, agitation speed, and mass/volume (m/v), in addition to sequential chemical treatment during different steps. The results showed that by using thermal clinoptilolite 87% and 91% of REE were removed from the treated solutions of Sample-I, and Sample-II respectively. The stripping of REE from clinoptilolite was carried out using (0.5M) Na2CO3 for 30 minutes at room temperature, the stripping percent of rare earth elements was achieved 95.8 % and 87.6% for clinoptilolite bearing Sample-I & that bearing Sample-II respectively.