Sajobabony bentonites

FIGURE 3.1 Sarmatian sediment series with bentonite sites in the Ko Valley around Sajobabony (Hungary) (Piispoki et al. 2003a,b). (Reprinted from Nagy and Konya 2005, with permission from Elsevier.)... 

On the basis of the specific surface area and CECs (Table 3.2), the bentonite samples at the Sajobabony site can be divided into two groups ... 

The Concentration of Edge Sites and Intrinsic Stability Constants of Protonation and Deprotonation of Silanol and Aluminol Sites of Bentonite Samples (Sajobabony, Hungary) Calculated by the Surface Complexation Model... 

The surface acid-base parameters of bentonites from Sajobabony can be compared to similar parameters of other bentonites samples (Chapter 2, Section 2.4.3, Table 2.4). As mentioned in Chapter 2, Section 2.4.3, the parameters of SWy-2, BSAB, and MX-80 from the literature, cannot be compared to the data of bentonite samples from Sajobabony because the deprotonation of silanol and aluminol sites are treated together. Calcium bentonite (Istenmezeje, HU) shows similar characteristics as sedimentary bentonites, while the ratio of the amount of the edge site and the deprotonation intrinsic stability constant of SWy-1 bentonite is similar to the data of the bentonitic tuff. 

As seen previously, bentonite samples from the same bentonite deposit (Sajobabony) show no significant differences in the montmorillonite content, but the circumstances of their geological formation are different. The sedimentary bentonites (B-I.b. and B-II.a.) show similar interfacial properties, while the bentonitic tuff (B-II.b.) behaves differently. This is probably caused by the large amount of the x-ray amorphous phase. 

Although what has been discussed is specific to a particular bentonite deposit, namely, the Ko Valley around Sajobabony, the conclusions are general and valid for other bentonites, too. 

The application of the linear model will be shown for cesium-137 and strontium-85 ions. Cs-137 and the different strontium isotopes, especially Sr-90, are important components of nuclear wastes. As seen previously in Table 3.2, the cesium ion has a different sorption property on bentonite samples from the Sajobabony deposit, depending on geological origin and composition. Similarly, different bentonite rocks from the Carpathian Basin (Table 3.4) show different sorption properties, including kinetics and equilibrium (Figure 3.4, Table 3.5 Nagy et al. 2003b Konya et al. 2005). 

The effective migration coefficients of bentonite samples from Sajobabony deposit (Table 3.1) are listed in Table 3.11. 

Effective Migration Coefficients of Chloride, Cesium, and Strontium Ions in Bentonites from the Sajobabony Deposit (Table 3.1)... 

Nagy, N. M., and J. Konya. 2005. The relations between the origin and some basic physical and chemical properties of bentonite rocks illustrating on the example of Sarmatian bentonite site at Sajobabony (HU). Appl. Clay Sci. 28 257-267. 

Puspoki, Z., M. Kozak, B. Kiss, P. Kovacs-Palffy, and A. Bartha. 2003c. Descriptive characteristics of bentonite layers in a sedimentary bentonite site with tuffogenic origin (Sajobabony—NE Hungary). Anu. Inst. Geol. Rom. 73 36. 

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