Uranium Recovery from Aqueous Solutions Using Amidoxime Modified Cellulose Derivatives. II. Uranium Uptake Behavior of Amidoximated Ethyl Cellulose
Amidoxime modified ethyl cellulose (EC-g-AO) was used for the recovery of uranyl ions from aqueous solutions by a complexation process. Adsorption trials were carried out in different concentrations of UO22+ solutions (100 – 1000 mg/L) and at temperatures ranging from 25 to 50°C. The kinetics and t...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Turkish Chemical Society
2018-01-01
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| Series: | Journal of the Turkish Chemical Society, Section A: Chemistry |
| Subjects: | |
| Online Access: | http://dergipark.gov.tr/jotcsa/issue/33408/310947 |
| Summary: | Amidoxime modified ethyl cellulose (EC-g-AO) was used for the recovery of uranyl ions from aqueous solutions by a complexation process. Adsorption trials were carried out in different concentrations of UO22+ solutions (100 – 1000 mg/L) and at temperatures ranging from 25 to 50°C. The kinetics and the thermodynamics of the adsorption of uranyl ions (UO22+) by EC-g-AO were investigated. The adsorption capacity was found as 240 mg UO22+/g dry copolymer. The thermodynamic parameters for the interaction of UO22+ with EC-g-AO were calculated from thermodynamic relations. Calculations showed that adsorption occurred through strong electrostatic interactions with an enthalpy of -23.6 kJ/mol. The desorption of UO22+ was investigated by desorption agents like EDTA, HCl, NaHCO3, and NaOH. 52 % of desorption yield was found for NaHCO3. |
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| ISSN: | 2149-0120 2149-0120 |