Determination of the surface energy of kaolinite and serpentine using PACHA formalism—Comparison with immersion experiments

Energetics of the interaction of water and other liquids with the surface of hydrophilic and hydrophobic sorbents according to data on the heats of wetting

“…Their analysis shows that the surface enthalpy of quartz and Grafon agrees well with our data [11,12]. The H S 0 value for hydromica (illite), given in [51] and in Table 4, is low compared with the value of H S = 535 mJ/m 2 [11] calculated from direct experimental determination of the surface free energy of mica by the cleavage method s S = 480 mJ/m 2 [55]. By comparison of the heat of wetting of Kabosil q = 170 mJ/m 2 (Table 3) and of Silochrome, close to it in properties, q = 150 mJ/m 2 [43] it can be supposed that the value of H S 0 = 144 mJ/m 2 for Kabosil obtained in [51,54] is low.…”

“…Douillard [34,44,55] tried to get round this problem by using the approximate linear equation DG = fDH and assigning values of 0.3-0. 45 to the coefficient f during determination of the free energy of wetting.…”

“…In connection with the foregoing Table 3 gives previously obtained [51,54,55] heats of wetting of hydromica and kaolinite, subjected to vacuum pretreatment at moderate temperatures (T = 150°C), and of quartz and Kabosil silicas, which are sorbents with "hard" hydroxyl coverage. The surface enthalpies of the sorbents (Table 4) were calculated on the basis of these results using the method given in [45].…”

The sorption behavior of Cs + ion on clay minerals and zeolite in radioactive waste management: sorption kinetics and thermodynamics

“…There are no cations in the interlayer space [21,22]. On kaolinite, only surface bondings of cations occur.…”

Effects of Heating and Acid Activation on the Structure and Surface Properties of a Kaolinite-illite-smectite Clayey Mixture

“…They consist of measuring the flow, the pressure or the amount of adsorbed gas or of saturated hydrocarbon solutions [11]. Salles et al [12] determined the surface energy of kaolinite and serpentine based on heat of immersion experiments by using the PACHA formalism. The authors used model clays (kaolinite and serpentine) and compared its surface energy data obtained either by solid state calculations using electronegativities equalization, or by immersion experiments.…”