Bulg. J. Phys. vol.27 no.S3 (2000), pp. 223-226



Physicochemical Characterization of Al-Pilcs Prepared From Different Romanian Bentonites

E. Popovici1, I. Bedelean2, Gh. Singurel1, G. Arghir3, D. Pop2, H. Bedelean2, M. Ivan1
3Tehnical University of Cluj-Napoca, Romania
Abstract. Romanian bentonites were pillared via direct or indirect intercalation of Keggin ions. ll has been shown that the hydroxy-oligomeric cation uptake increased with both cation exchange capacity of starting bentonites and specific conditions employed in the pillaring process: OH-/Al = 2; 3 mmol Al/g bentonile; 20-50℃. The surface area of the pillared materials depended on the cation exchange capacity of the starting bentonites. The adsorption capacity of pillaring samples can be controlled by both pillaring method and thermal treatment of the prepared samples.

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