Solid phase extraction of zinc(II) using a PVC-based polymer inclusion membrane with di(2-ethylhexyl)phosphoric acid (D2EHPA) as the carrier

Talanta ◽  
2009 ◽  
Vol 78 (3) ◽  
pp. 795-799 ◽  
Author(s):  
Spas D. Kolev ◽  
Yoshinari Baba ◽  
Robert W. Cattrall ◽  
Tsutomu Tasaki ◽  
Natalie Pereira ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Inclusion Membrane ◽  
Polymer Inclusion Membrane

Solid phase extraction of uranium from phosphoric acid: kinetic and thermodynamic study

2017 ◽  
Vol 105 (10) ◽  
Author(s):  
Ahmed Fawzy Abdel-Magied
Keyword(s):  
Phosphoric Acid ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Mixing Time ◽  
Phosphoric Acid Solution ◽  
Phase Extraction ◽  
Mixture Ratio ◽  
Kinetic And Thermodynamic Study ◽  
Phosphoric Acid Concentration ◽  
Mcm 41

AbstractThere is a high interest to develop suitable solid phase extractants for uranium separation from aqueous solutions in order to reduce cost and enhance the efficiency. This paper describes solid phase extraction of uranium(VI) from aqueous phosphoric acid solution using MCM-41 based D2HEPA-TOPO organophosphorous extractants. The mixture of D2HEPA (di-2-ethyl-hexylphosphoric acid) and TOPO (tri-n-octylphosphine oxide) was impregnated into the pores of MCM-41 and the synthesized sorbent was fully characterized. The influences of different factors such as synergistic mixture ratio, phosphoric acid concentration, mixing time and temperature were investigated. The results showed that 90% of uranium(VI) extraction can be achieved within 5 min, using D2HEPA-TOPO@MCM-41 (mass ratio 2:1 w/w) from 1 M phosphoric acid containing 64 ppm of uranium at room temperature. High adsorption capacity of uranium(VI) have been achieved at the mentioned conditions. The rate constant for the chemical adsorption of uranium(VI) was 0.988 g mg

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