Uranium(VI) recovery from acidic leach liquor using manganese oxide coated zeolite (MOCZ) modified with amine

Manganese oxide coated zeolite modified with trioctyl amine (MOCZ/TOA) was tested for adsorption of uranium. Different experiments were performed to evaluate the optimum adsorption conditions; pH, dose, uranium concentration, temperature variation and contact time. Maximum adsorption capacity reache...

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Bibliographic Details
Published inJournal of radioanalytical and nuclear chemistry Vol. 324; no. 1; pp. 409 - 421
Main Authors Yousef, L. A., Bakry, A. R., Ahmad, A. A.
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.04.2020
Springer Nature B.V
Subjects
Acidic oxides
Adsorption
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Inorganic Chemistry
Manganese oxides
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Process parameters
Reaction kinetics
Recovery
Sulfuric acid
Uranium
Zeolites
Elution
Kinetic
Adsorption
Equilibrium
MOCZ/TOA
Uranium(VI)
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Summary:Manganese oxide coated zeolite modified with trioctyl amine (MOCZ/TOA) was tested for adsorption of uranium. Different experiments were performed to evaluate the optimum adsorption conditions; pH, dose, uranium concentration, temperature variation and contact time. Maximum adsorption capacity reached 99 mg/g according to Langmuir model. The study of thermodynamic parameters showed that sorption process is non spontaneous, exothermic and random. Studies on process kinetics showed that the process obeys pseudo-second order model. Uranium desorption was accomplished using 0.3 M H 2 SO 4 . Optimum conditions were carried out for uranium recovery from sedimentary geologic sample from Gattar area, North Eastern Desert, Egypt. The final uranium precipitate was characterized by ICP-OES technique.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-020-07042-7