Potentiality of uranium adsorption from wet phosphoric acid using amine-impregnated cellulose

Abstract

The prepared amine-impregnated cellulose (AIC) was found to be an efficient adsorbent for uranium originated from El-Sebaiya phosphate ore. The impregenation process was carried out by copolymerization between pretreated cellulose and a mixture of (tri-ethyl amine and epi-chorohydrine).In the present work, two working solutions were used. The first solution was a synthesized phosphoric acid (35% P 2 O 5 and 100 ppm U) used for optimizing the loading process of uranium. The second one was used as a case study for adsorption of uranium from a real phosphoric acid (WPPA) prepared from El-Sebaiya phosphate ore (P 2 O 5 35%, 100 ppm U).The obtained equilibrium data were found to be satisfactory fitted with Langmuir isotherm.A maximum-metal uptake of 56.5 mgU/g AIC was observed at the obtained optimum conditions. Also, elution process of uranium has been achieved at 1 M of 30 ml Na 2 CO 3 solution/g AIC after 15 min contact time. From the latter, a marketable product of sodium di-uranate was prepared.

The Study of Amidoxime-Functionalized Cellulose Separate Th(IV) from Aqueous Solution

“…The chemical pretreatment methods include TEMPO oxidation, sulfonation, phosphorylation, esterification, cationization, amination, etc. [ 20 , 21 , 22 , 23 ], which can not only increase the adsorption sites of cellulose, but also change the morphology of adsorption materials, thus enhancing the interaction with metal ions [ 24 ]. Among the numerous coordination functional groups, the amidoxime group could combine with many kinds of metal ions under acidic conditions to form stable chelates.…”

Removal of Radionuclide Uranium from South China’s Ion-adsorption Rare Earth Leach Liquor Using Solvent Extraction with Naphthenic Acid

“…Double sulfate precipitation and oxalate precipitation have been shown to be effective in separating U from RE, but the separation is achieved by precipitating the RE's rather than the U. Other techniques, such as adsorption by various materials [7][8][9][10], are effective in some applications, but high cost and tightly controlled conditions have limited their usefulness in industrial practice.…”

Application of the produced microbial citric acid as a leachate for uranium from El-Sebaiya phosphate rock

“…However, this has been realized on the expense of relatively gypsum formation (Orabi, El-Sheikh, Mowafy, Abdel-Khalek, & El Kady, 2015;Orabi et al, 2016;etc.). On the other hand, separation of U from its leach liquors in these studies has mainly been done by several techniques, for example, solvent extraction, anion impregnated resins, etc.…”