Title of article :
Characterization of uranium(VI) sorption by organobentonite
Author/Authors :
Marek Majdan، نويسنده , , Stanislaw Pikus، نويسنده , , Agnieszka Gajowiak، نويسنده , , Agnieszka G?adysz-P?aska، نويسنده , , Halina Krzy?anowska، نويسنده , , Jerzy ?uk، نويسنده , , Monika Bujacka، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
The U(VI) sorption on the bentonite modified by hexadecyltrimethylammonium bromide (HDTMA) was studied in the concentration range: 0.0001–0.001 mol/dm3 in the aqueous phase and in the pH range: 3–10. The experiments concerning the pH influence on the molar absorption coefficient cb of U(VI) in the bentonite phase showed that the species: UO22+, UO2(OH)+, UO2(OH)2 UO2(OH)3−, UO2(OH)42−, (UO2)3(OH)5+, (UO2)3(OH)7−, present in the aqueous phase, are responsible for uranium sorption. Their sorption parameters K were determined and it is evident that for higher concentrations of HDTMA+ cations in the bentonite phase, i.e. for b96–b157 bentonite, the presence of anionic species: UO2(OH)3 −, UO2(OH)42−, and (UO2)3(OH)7− in the aqueous phase results in the increase of U(VI) molar absorption coefficient cb in the sorbent phase.
Keywords :
Uranium , Sorption , Organobentonite , Hexadecyltrimethylammonium bromide
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science