Recovery of uranium from aqueous solutions by trioctylamine impregnated polyurethane foam†

Separation, preconcentration and determination of silver ion from water samples using silica gel modified with 2,4,6-trimorpholino-1,3,5-triazin

“…It has several advantages over other techniques, including stability and reusability of the solid phase, reach of high preconcenrtation factors, easiness of separation and enrichment under dynamic conditions, no need for organic solvents which may be toxic and minimal costs due to low consumption of reagents. Accordingly, several selective solid-phase extractors have been prepared by either physical loading or chemical binding of selected chelating reagents to different solid supports such as silica gel [14][15][16][17][18][19][20][21], activated carbon [22,23], cellulosic derivatives [24], polyurethane foam [25] and chelating ion exchange resins [26][27][28][29].…”

Alumina physically loaded by thiosemicarbazide for selective preconcentration of mercury(II) ion from natural water samples

“…The advantages of using SPE technique is versatile [1,6], it is rapid, reproducible, requires only small volumes of solvents or none at all as in the case of solid-phase microextraction device [5]. The solid-phase extractor is arised from the immobilization of organic complexing agents to the surface of organic supports such as polyurethane foams [7], cellulosic derivatives [8,9] and ion exchange resins [10][11][12][13] or inorganic as silica gel [14][15][16][17][18][19][20] and alumina [21][22][23].…”

Co-Adsorption and Separate Elution of Uranium and Thorium from Acid Solution of Egyptian Monazite by Solvent Impregnated Foam

“…Consequently, we decided testing the impregnated long chain primary amine (CH3(CH2)11NH2 ) (dodecyl amine) [17] onto the polyurethane foam [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] for the co-adsorption of uranium and thorium from Egyptian monazite sulfate solution. The studied relevant factors affecting uranium and thorium sorption onto the solvent impregnated foam included contact time, initial uranium and thorium concentrations, solution pH and reaction temperature.…”