Adsorption of cesium on Czech smectite-rich clays - A comparative study

0030018 - ÚACH 2006 RIV NL eng J - Journal Article
Vejsada, J. - Hradil, David - Řanda, Zdeněk - Jelínek, E. - Štulík, K.
Adsorption of cesium on Czech smectite-rich clays - A comparative study.
[Sorpce Cs na vybraných smektitem bohatých jílech.]
Applied Clay Science. Roč. 30, č. 1 (2005), s. 53-66. ISSN 0169-1317. E-ISSN 1872-9053
R&D Projects: GA ČR GA104/02/1464; GA AV ČR IAA3032401
Institutional research plan: CEZ:AV0Z40320502
Keywords : cesium * adsorption * batch method
Subject RIV: CA - Inorganic Chemistry
Impact factor: 1.324, year: 2005

The adsorption of cesium on various smectite-rich clays was studied as a function of the initial concentration of cesium and in the presence of competitive ions (Na+, K+ and Ca2+) using the radiotracer method, examining the effects of the clay structure and comparing the behaviour of bentonites with that of sedimentary clays. The experiments were performed under laboratory conditions, at 22-25 degrees C, in ambient atmosphere and using synthetic average granite groundwater as the liquid phase. Reference smectites (STx-1, SAz-1), illite (IMt-1) and kaolinite (KGa-2), three Czech smectite-rich clays (bentonite from Rokle, sedimentary clays from Skalna and Marsov) and three Spanish bentonites from Cabo de Gata were used as the natural sorbents. The adsorption data were fitted by the Freundlich isotherm. Smectites exhibited the highest values of the adsorption capacity and the highest affinity for cesium within the studied concentration range, 10(-6) to 10(-1) M.

Sorpce Cs na vybraných smektitem bohatých jílech byla studována jako funkce jeho počáteční koncentrace. Dále byl studován vliv přítomnosti konkurenčních iontů (Na+, K+ and Ca2+) a byly srovnávány bentonity se sedimentárními jíly. Byly odvozeny dva základní typy sorpčního chování.
Permanent Link: http://hdl.handle.net/11104/0119797