In: Geologica Carpathica Clays, vol. 2, no. 1
Ljudmila Filizova - Nadia Petrova - Georgi N. Kirov
Detaily:
Rok, strany: 1993, 31 - 34
O článku:
Heats of ion-exchange of Na-clinoptilolite in 0.25 M; 1 M; 2 M; 4 M; 8 M KCNS and Ca-clinoptilolite in 0.5 M; 1 M; 4 M; 7.2 M NaNO3 aqueus solutions were measured by differential calorimeter at 30° C. The content of alkali metal cations was determined by flam-photometry of the initial and the ion-exchanged samples. In the case of Ca-Na system, the degree of ion-exchange srongly depends on the concentration, while for the Na-K system this dependence is negligeable. The heats of ion-exchange were measured per gram and recalculated per gram equivalent exchanged cations. In both systems, the maximum of emitted heat was registered for 1 M solutions. The interpretation of the results is based on the theory of ion-hydration in solutions.
Ako citovať:
ISO 690:
Filizova, L., Petrova, N., N. Kirov, G. 1993. ION-EXCHANGE OF CLINOPTILOLITE IN SOLUTIONS WITH DIFFERENT CONCENTRATION: A CALORIMETRIC STUDY. In Geologica Carpathica Clays, vol. 2, no.1, pp. 31-34.
APA:
Filizova, L., Petrova, N., N. Kirov, G. (1993). ION-EXCHANGE OF CLINOPTILOLITE IN SOLUTIONS WITH DIFFERENT CONCENTRATION: A CALORIMETRIC STUDY. Geologica Carpathica Clays, 2(1), 31-34.