Investigation of rhenium adsorption isotherm from two-component solutions by Dowex 21K and desorption tests using alkaline solutions

Document Type : Research Article


1 Mining Department, Engineering Faculty, Urmia, University

2 Mining Eng. Faculty, Amirkabir University


Nowadays, solutions and effluents resulting from the activities of mineral processing plants and related industries can be considered one of the most important resources for the production of valuable elements. Examining the extraction method and improving it, in addition to reducing the needs of modern industries, can be considered one of the effective methods in controlling wastes and reducing environmental concerns. In this study, in the presence of molybdenum the adsorption behavior of rhenium on the Dowex 21K resin from pregnant solutions, in conditions very close to copper-containing solutions resulting from heap leaching, was investigated by Freundlich, Temkin, Dubinin – Radushkevich and Langmuir isothermal equations. The results showed that in the case of one-component solutions, the fit of the data obtained from static experiments on the mentioned equations is most consistent with the Friendlich equation and in the case of two-component conditions with its expanded form. Examination of resin capacity changes in the two conditions showed that due to the presence of the second component, competition between the existing ions, the resin capacity is reduced by about 47%. Also, the examination of ammonium acetate (0.5 M) on desorption of adsorbed ions from seven resin samples loaded showed that after 7 hours, more than 92% of molybdenum was released from the resin, while during this period, the amount of rhenium desorption no more than 13% was obtained.


Main Subjects

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