| Autor: |
Petrova, Petranka, Chochkova, Maya, Veleva, Olga, Karadjov, Metody |
| Předmět: |
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| Zdroj: |
Journal of Chemical Technology & Metallurgy; 2020, Vol. 55 Issue 4, p691-697, 7p |
| Abstrakt: |
Schiff bases of 4-aminoantipyrine (Fig. 1, (a-d)) are synthesized and immobilized on silica gel to obtain 4 sorbents selective for Pt ions (Sig-Schiff a-d). The extraction efficiency of the newly prepared sorbents toward Pt(II) and Pt(IV) is studied by a batch method and the application was performed in a column mode. The role of various parameters such as the sample acidity, the type and the concentration of the eluent, the sample and the eluent flow rates are optimized for a quantitative sorption of Pt(II) and Pt(IV). The influence of the different substituents in the benzylidene ring of the Schiff bases on the coordination properties of the sorbents and the extraction efficiency and selectivity toward Pt species is elucidated. It is found that the sorbents synthesized demonstrate a high selectivity toward Pt(II) - the quantitative sorption is achieved at high concentrations of HCl, whereas Pt(IV) has a poor sorption ability under identical experimental conditions. Moreover, the sorbents preserve their extraction capability and selectivity toward Pt(II) in acidic media even in presence of significant amounts of base metals. An analytical procedure is developed for Pt determination in surface waters and spent automotive catalysts. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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