Azo resorcin[4]calixpyrrole grafted Amberlite XAD-2 polymer: an efficient solid phase extractant for separation and preconcentration of La(III) and Ce(III) from natural geological samples

作者：Gupte Hrishikesh S; Bhatt Keyur D^*; Jain Vinod K; Vyas Disha J; Makwana Bharat A

来源：Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2015, 81(3-4): 409-422.

DOI：10.1007/s10847-014-0468-5

• Calix[4]pyrrole
• Amberlite XAD-2 resin
• Preconcentration of La(III) and Ce(III)

The impregnation of new azocalixpyrroles obtained from resorcinol derivative into a polymeric chelating resin, Amberlite XAD-2. A simple and effective method is presented for the separation and preconcentration of U(VI)] and Thorium Th(IV) by solid phase extraction on synthesized modified polymeric chelating resin. The synthesized chelating polymeric sorbent showed superior binding affinity towards U(VI) and Th(IV) under selective pH conditions. The optimum pH range was established and the flow rates for U(VI) and Th(IV) were studied respectively. U(VI) and Th(IV) are quantitatively eluted with suitable eluants like HCl and HNO3 and determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). Other parameters such as total sorption capacity, exchange kinetics, preconcentration factor, distribution coefficient, breakthrough capacity and resin stability. The uptake and stripping of these metal ions on the resin were fast, indicating a better accessibility of the metal ions towards the chelating sites. Chromatographic separation of Th(IV) and U(VI) was accomplished by adjustment of pH in the range of 3.0-9.0 pH, respectively. Separation of Th(IV) and U(VI) from other metal cations, in synthetic solution was achieved. The synthesized resins were recycled at least 14-16 times without much affecting column sorption capacity.

• 出版日期2015-4