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 |
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Format: | Artikel |
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. |
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ISSN: | 0250-4707 0973-7669 |
DOI: | 10.1007/s12034-016-1222-y |