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Effect of Sodium Chloride and pH on the Composition of the Equilibrium Phases and the Partition of Palladium(II) in the Aqueous Two-Phase System PEG1500–Na2SO4–Waterстатья Исследовательская статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 апреля 2021 г.
- Авторы: Milevskiy Nikita A., Boryagina Irina V., Karpukhina Evgeniya A., Kuznetsov Victor N., Kabanova Elizaveta G.
- Журнал: Journal of Chemical and Engineering Data
- Том: 66
- Номер: 2
- Год издания: 2021
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 1021
- Последняя страница: 1031
- DOI: 10.1021/acs.jced.0c00832
- Аннотация: Binodal curves for aqueous two-phase systems (ATPS) polyethylene glycol 1500 (PEG1500)–sodium sulfate–water with additions of sodium chloride and hydrochloric or sulfuric acids were determined by turbidimetric titration and analysis of coexisting phases. The results are compared with published data for the ATPS PEG1500–sodium sulfate–water without additions, and the influence of additions on the width of the two-phase field, tie-lines length, and slopes was traced. The influence of initial concentration of palladium, time of phase contact, pH, concentration of sodium chloride and sodium sulfate on the extraction of palladium(II) was studied. The coefficients of distribution of palladium(II) between the phases of ATPS were measured as a function of the concentrations of sodium chloride (0.1, 1.0, and 2.0 mol·L–1) and pH values. At lower concentrations of Cl– ions Pd(II) is extracted as a mixture of ions [Pd(H2O)Cl3]− and [PdCl4]2–, whereas the growth of C(Cl–) leads to prevalence of the latter, which has poorer extraction properties. Maximal values of the distribution coefficient DPd of about 9.5 ± 0.75 were achieved in the ATPS PEG1500–Na2SO4–0.1 M HCl and PEG1500–Na2SO4–(0.05 M H2SO4 + 0.1 M NaCl).
- Добавил в систему: Кабанова Елизавета Генриховна