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Impregnated Type Sorbents for Pb2+ Recovery from Neutral and Acidic Solutionsстатья
- Авторы: Bezhin N.A., Dovhyi I.I., Lyapunov A.Yu, Baulin V.E., Baulin D.V., Tsivadze A.Yu
- Журнал: Russian Journal of Inorganic Chemistry
- Том: 64
- Номер: 9
- Год издания: 2019
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1178
- Последняя страница: 1185
- DOI: 10.1134/s0036023619090031
- Аннотация: Synthetically convenient method for preparing phosphoryl podand 1,8-bis[2-(diphenylphosphorylmethyl)phenoxy]-3,6-dioxaoctane (L) has been developed. Recovery of Pb2+ with impregnated type sorbents was studied, the sorbents contain isodentate organic ligands—phosphoryl podand L and crown ether (4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6)—as extractants. A sorbent based on the phosphoryl podand quantitatively extracts lead from neutral solutions (R = 98.4%) and does not recover it from acid solutions. On the contrary, the sorbents based on 4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6 do not extract lead from neutral media and efficiently adsorb it from nitric and hydrochloric acid solutions (R = 90% from 3 M nitric acid solutions and R = 73.2% from 2 M hydrochloric acid solutions). Effect of diluent and support type, support pretreatment procedure, impregnation temperature and time, and solvent for support impregnation on lead sorption with sorbents based on 4,4',(5')-di(tert-butyl)dicyclohexyl-18-crown-6 have been studied.
- Добавил в систему: Бежин Николай Алексеевич