Selective extraction and detection of noble metal based on ionic liquid immobilized silica gel surface using ICP-OES

In this study, an efficiently employed ionic liquid combined with commercially available silica gel (SG–ClPrNTf 2 ) was developed for selective detection of gold(III) by use of inductively coupled plasma–optical emission spectrometry (ICP-OES). The selectivity of SG–ClPrNTf 2 was evaluated towards s...

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Veröffentlicht in:Bulletin of materials science 2016-08, Vol.39 (4), p.1011-1019
Hauptverfasser: MARWANI, HADI M, ALSAFRANI, AMJAD E, AL-TURAIF, HAMAD A, ASIRI, ABDULLAH M, KHAN, SHER BAHADAR
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Sprache:eng
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Zusammenfassung:In this study, an efficiently employed ionic liquid combined with commercially available silica gel (SG–ClPrNTf 2 ) was developed for selective detection of gold(III) by use of inductively coupled plasma–optical emission spectrometry (ICP-OES). The selectivity of SG–ClPrNTf 2 was evaluated towards seven metal ions, including Y(III), Mn(II), Zr(IV), Pb(II), Mg(II), Pd(II) and Au(III). Based on pH study and distribution coefficient values, the SG–ClPrNTf 2 phase was found to be the most selective towards Au(III) at pH 2 as compared to other metal ions. The adsorption isotherm of Au(III) on the SG–ClPrNTf 2 phase followed the Langmuir model with adsorption capacity of 59.48 mg g −1 , which was highly in agreement with experimental data of adsorption isotherm study. The kinetics study indicated that Au(III) adsorption kinetics data were well fit with the pseudo-second-order kinetic model on the basis of correlation coefficient fitting (0.996) and adsorption capacity agreement (62.26 mg g −1 ). Furthermore, SG–ClPrNTf 2 phase was effectively performed for the determination of Au(III) in real water samples with satisfactory results.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-016-1222-y