Characteristics of uranium recovery from phosphoric acid by an aminophosphonic resin and application to wet process phosphoric acid

Abstract

The chelating aminomethylphosphonic resin Amberlite IRC747 is used for uranium recovery from a synthetic phosphoric acid solution. The operating conditions of uranium extraction have been experimentally optimized by the batch technique viz., the phosphoric acid concentration, the contact time, the initial uranium concentration and the temperature. The effect of some interfering ions upon the effective capacity of the resin has also been examined. It has thus been found that the maximum uranium adsorption capacity of the studied chelating resin was found to attain 86.5 mg/g at 5 M phosphoric acid using 0.1 g resin for 120 min contact time with 50 mL acid assaying 200 mg U/L and room temperature. The obtained equilibrium data agreed well with the Langmuir isotherm model and the relevant thermodynamic parameters (ΔG, ΔH and ΔS) were evaluated and the uranium adsorption was found to be an endothermic reaction and of spontaneous nature. From the kinetic experiments it was shown that U(VI) adsorption followed the pseudo-second order kinetics model and the intraparticle diffusion model. Also, it has been possible to reveal from the kinetic and isotherm data the chemisorption nature of uranium on the Amberlite IRC747 resin. The adsorbed uranium ions can almost be completely eluted with 0.8 M (NH4)2CO3 solution from the loaded resin at room temperature. The studied optimized conditions have successfully been applied for uranium recovery from Abu Zaabal wet process phosphoric acid (WPPA).

Selective Extraction of Rare Earth Elements from Phosphoric Acid by Ion Exchange Resins

“…Since this phenomenon has been observed on two types of phosphorus resins (with phosphinic or phosphoric functional groups), it is likely that resins with a phosphonic group should not be particularly heat sensitive too. This is confirmed by a uranium extraction study with Amberlite IRC747 resin between 40 °C and 60 °C [14].…”

Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies

“…The ion exchange and adsorption processes are the most common methods for separation, preconcentration and recovery of uranium from its solutions. Ambersep 920U Cl extracts uranium(VI) from saline Abu Zeneima rock sample, south western Sinia, Egypt (Cheira, El-Didamony, Mahmoud, & Atia, 2014), or else as a uranyl cation UO 2 2þ by aminophosphonic acid chelating resin, Amberlite IRC-747, adsorbs U(VI) from Abu Zaabal wet process phosphoric acid (Cheira, 2015a). The chemical and physical functionalization of a solid support with chelating active sites is reported.…”

The use of Alizarin modified bentonite for removal of some heavy metals ions from the wet process phosphoric acid

“…From each adsorption experiment a number of individual metal ions adsorbed on the AIAB adsorbent (q e , mg/g), adsorption efficiency (E, %), and distribution coefficient (K d ) are calculated from the following equations (Cheira, 2015):…”

“…The choice of an economically suitable technique depends upon many parameters such as the concentration of wet process phosphoric acid, the amount and the concentration of the co-dissolved impurities. These techniques are precipitation (Abdennebi et al, 2017), floatation (Haraldsen, 1991), membrane extraction (Al-Harahsheh et al, 2017;Machorro et al, 2013), crystallization ((Aaltonen et al, 2004;Chen et al, 2012), ion exchange (Marcus et al, 2004;Cheira, 2015), liquid-liquid extraction (Singh et al, 2009;Chen et al, 2016;Assuncao et al, 2017;Li et al, 2017), and solid phase extraction (Awwad et al, 2013 ).…”