Carbonate Effects on Hexavalent Uranium Adsorption by Iron Oxyhydroxide

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dc.contributor.author Wazne, Mahmoud
dc.contributor.author Korfiatis, George P.
dc.contributor.author Meng, Xiaoguang
dc.date.accessioned 2016-03-01T13:53:04Z
dc.date.available 2016-03-01T13:53:04Z
dc.date.copyright 2003
dc.date.issued 2016-03-01
dc.identifier.issn 0013-936X en_US
dc.identifier.uri http://hdl.handle.net/10725/3231
dc.description.abstract Carbonate dramatically affects the adsorption of uranium (U(VI)) onto iron hydroxides and its mobility in the natural environment. Batch tests, zeta potential measurements, and Fourier transform infrared (FTIR) spectroscopic studies were utilized to characterize the nature of U(VI) adsorption on ferrihydrite. Adsorption isotherms demonstrated that carbonate had a negative effect on U(VI) adsorption on ferrihydrite at pH >6. Zeta potential measurements indicated that U(VI) was adsorbed as a cationic species (SO−UO2+) in the absence of carbonate and as anionic U(VI) complexes in the presence of carbonate at neutral pH. FTIR spectroscopic measurement of adsorbed U(VI) suggested that it was retained as uranyl carbonate complexes in the presence of carbonate. An increase in carbonate concentration caused a shift in the antisymmetric stretching vibration of the uranyl (UO22+) U−O bond toward lower wavenumbers, which indicated an increasing carbonate effect in the adsorbed uranyl carbonate complexes. The adsorbed U(VI) species were successfully incorporated into a surface complexation model to describe the adsorption of U(VI) by ferrihydrite from artificial solutions and contaminated water. en_US
dc.language.iso en en_US
dc.title Carbonate Effects on Hexavalent Uranium Adsorption by Iron Oxyhydroxide en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 201205627 en_US
dc.author.woa N/A en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal Environmental Science and Technology en_US
dc.journal.volume 37 en_US
dc.journal.issue 16 en_US
dc.article.pages 3619-3624 en_US
dc.identifier.doi http://dx.doi.org/10.1021/es034166m en_US
dc.identifier.ctation Wazne, M., Korfiatis, G. P., & Meng, X. (2003). Carbonate effects on hexavalent uranium adsorption by iron oxyhydroxide. Environmental Science & Technology, 37(16), 3619-3624. en_US
dc.author.email mahmoud.wazne@lau.edu.lb
dc.identifier.url http://pubs.acs.org/doi/abs/10.1021/es034166m

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