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Sorption of rhenium from sulfuric acid solutions with trialkylamine-containing impregnatesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Дата последнего поиска статьи во внешних источниках: 27 марта 2018 г.
- Авторы: Troshkina I.D., Veselova O.A., Vatsura F.Y., Zakharyan S.V., Serikbay A.U.
- Журнал: Izvestiya vuzov. Tsvetnaya metallurgiya
- Том: 6
- Год издания: 2017
- Первая страница: 608
- Последняя страница: 613
- DOI: 10.3103/S106782121706013X
- Аннотация: ⎯ henium (VII) from sulfuric acid solutions with impregnants based on macropo- enzene, a weakly acidic cation-exchange resin), rous poly which contain technical trialkylamine (TAA), is investigated in static conditions. Equilibrium and kinetic characteristics of sorption of rhenium with the K-TAA impregnant based on macroporous cationite having the best capacitive characteristics with respect to rhenium are found. The maximal distribution coefficient of rhenium in the K-TAA impregnant is observed during sorption from solutions with pH 2. The sorption iso- therm of rhenium is described by the Langmuir equation with constant K = 29 ± 2 mL/g. Integrated kinetic curves of sorption are found by the method of a limited solution volume at various temperatures and effective diffusivities of rhenium in an impregnant, which are equal to 3.8 × 10–11 (295 K) and 1.3 × 10–10 (308 K) m2/s, are calculated allowing to the half-transformation time. Processing the kinetic data by linearization according to equations of models of the pseudo-first, pseudo-second, internal diffusion, and Elovich showed that kinetic curves are described with the highest degree of correlation by pseudo-second-order equations with rate constants 0.00056 (295 K) and 0.00059 (308 K) g mg–1 min–1. The apparent activation energy of sorption of rhenium of 39 ± 2 kJ/mole is calculated according to the Arrhenius equation. The K-TAA impregnant is approved for the sorption of rhenium from the eluate formed during the desorption of rhenium from the Purolite A170 weakly basic anion-exchange resin preliminarily saturated with rhenium from a productive solution of processing products of a weak rhenium-containing sulfide copper feedstock with a com- x composition.
- Добавил в систему: Трошкина Ирина Дмитриевна