Solvent-impregnatedresins (SIR) containingdi-(2,4,4-trimethylpentyl)phosphinic acid (DTMPPA) were prepared by adsorption of the organophosphorus extractant into AmberliteXAD-2 polymeric macroporous support. The distribution of DTMPPA between the aqueous phase and resin phase was determined as a function of both pH and loading of the organophosphorus extractant on the resin. The distribution ratio of the organophosphorus compound was obtained after determining the total phosphorus concentration in the aqueous phase by coupled plasma atomic emission spectroscopy. The data were analyzed numerically by the program LETAGROP-DISTR, in order to determine the distribution constant KD, the aggregation constant Kn, and the acidity constant Ka. Moreover, in order to clarify the interactions between the polymeric adsorbent and the extractant, Fourier transform infrared spectroscopy studies have been carried out. Finally the distribution of DTMPPA dissolved in toluene has been compared with its distribution in AmberliteXAD-2.
Solvent Impregnated Resins Containing di-(2,4,4-Trimethylpentyl)Phosphinic Acid. I. Comparative Study of di-(2,4,4-trimethylpentyl)phosphinic acid Adsorbed into Amberlite XAD-2 and Dissolved in Toluene.
PROFUMO, ANTONELLA;PESAVENTO, MARIA
1993-01-01
Abstract
Solvent-impregnatedresins (SIR) containingdi-(2,4,4-trimethylpentyl)phosphinic acid (DTMPPA) were prepared by adsorption of the organophosphorus extractant into AmberliteXAD-2 polymeric macroporous support. The distribution of DTMPPA between the aqueous phase and resin phase was determined as a function of both pH and loading of the organophosphorus extractant on the resin. The distribution ratio of the organophosphorus compound was obtained after determining the total phosphorus concentration in the aqueous phase by coupled plasma atomic emission spectroscopy. The data were analyzed numerically by the program LETAGROP-DISTR, in order to determine the distribution constant KD, the aggregation constant Kn, and the acidity constant Ka. Moreover, in order to clarify the interactions between the polymeric adsorbent and the extractant, Fourier transform infrared spectroscopy studies have been carried out. Finally the distribution of DTMPPA dissolved in toluene has been compared with its distribution in AmberliteXAD-2.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
