Solubilization of 4(2Pyridylazo)resorcinol in Hydrophobic– Hydrophilic Ionic Liquids and Extraction of Heavy Metal Ions from Aqueous Solutionsстатья
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Дата последнего поиска статьи во внешних источниках: 26 августа 2016 г.
Аннотация:The distribution of 4(2pyridylazo)resorcinol (5 × 10–4–1 × 10–2 M) in the systems tetraoctylam
monium Nlauroylsarcosinate (TOALS)–water and trioctylmethylammonium salicylate (TOMAS)–water is
studied. It is shown that the distribution coefficient of PAR does not depend on the ionic state of the reagent
in aqueous solution at pH 2.3–11.8; the logD values are 3.5 and 3.7 (Vo : Vw = 1 : 20) for TOALS and TOMAS,
respectively. The conditions for quantitative extraction of the ions of cadmium(II), lead(II), cobalt(II), cop
per(II), and zinc(II) in TOALS and TOMAS in the presence of 4(2pyridylazo)resorcinol are determined.