Heterogeneity of cation-exchange sites for KCa exchange in aluminosilicates
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Citrate adsorption can decrease soluble phosphate concentration in soil: Experimental and modeling evidence
2013, Applied GeochemistryCitation Excerpt :Otherwise the increase of available P would always be underestimated by the model. Note that the increase of dissolved K measured with the addition of different CaCl2 concentrations was surely the result of Ca2+–K+ exchange reactions (e.g. Goulding and Talibudeen, 1980; Hu et al., 2013), as we have also seen that the concentrations in dissolved Al, Fe, and Si did not vary in these extracts. Only the pH decreased as the result of Ca2+–H+ exchanges (e.g. Guo et al., 2004).
Cation and Anion Exchange
2013, Developments in Clay ScienceCitation Excerpt :In this model, the Gouy–Chapman diffuse ionic layer was extended to the interlayer space, while the high concentration of cations and their (different) distribution in the interlayer space (Kjellander, 1996; Quirk, 2001) were ignored. The exchangeable cations occupy sites of different energy in the interlayer space (Goulding and Talibudeen, 1980; Brouwer et al., 1983). The formation of ion exchange sites with very high selectivity for caesium ions, induced by (i) repeated wetting–drying cycles of potassium montmorillonite and (ii) layer charge reduction using the Hofmann–Klemen effect, was described by Maes et al. (1985).
Chapter 12.10 Cation and Anion Exchange
2006, Developments in Clay ScienceCitation Excerpt :In this model, the Gouy–Chapman diffuse ionic layer is extended to the interlayer space, while the high concentration of cations and their (different) distribution in the interlayer space (Kjellander, 1996; Quirk, 2001) are ignored. The exchangeable cations occupy sites of different energy in the interlayer space (Goulding and Talibudeen, 1980; Brouwer et al., 1983). The formation of ion-exchange sites with very high selectivity for caesium ions, induced by (i) repeated wetting–drying cycles of potassium montmorillonite and (ii) layer charge reduction using the Hofmann–Klemen effect, was described by Maes et al. (1985).
Adsorption equilibria in surface force balance studies
1995, Colloids and Surfaces A: Physicochemical and Engineering Aspects