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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.19 [2012] >
IJCT Vol.19(4) [July 2012] >
| Title: | Highly selective liquid-liquid extraction of cadmium(II) with hexaacetato calix(6)arene |
| Authors: | Thakare, Y S
Khopkar, S M
Malkhede, D D |
| Keywords: | Acetyl derivative
Cadmium(II)
Calix(6)arene
Separation
Solvent extraction |
| Issue Date: | Jul-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | In this study, cadmium(II) has been extracted with 10 mL of 0.0001 M acetyl
derivative of calix(6)arene at pH 8.0
by equilibrating for 5 min. Cadmium(II) is stripped quantitatively with 0.5 N
hydrochloric acid and determined photometrically by complexation with
4-(2-pyridylazo)resorcinol at 495 nm. The method affords the binary separation
of cadmium from associate elements and is further extended to analyse the
synthetic mixtures. The nature of the extracted species is determined from the
log-log plots. The result shows the formation of an ion pair complex [Cd(HR)2]org
in the organic phase. The temperature dependence of the extraction equilibrium
is examined by the temperature variation method. The value of ∆H0 =
+160485.48 J mole-1 indicates that the extraction reaction is
endothermic. The metal loading capacity of the reagent is found to be 150 ppm.
The proposed method is applicable to the analysis of real samples and the
results obtained are found to be reproducible and accurate. |
| Page(s): | 231-238 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.19(4) [July 2012]
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