Thermal and structural properties of Ca-rich Montmorillonite mechanically deformed by compaction and shear

Dry grinding of Ca and octadecyltrimethylammonium montmorillonite

“…They showed that the grinding time exerts greater influence on the reflectance from calcite surfaces than from clay minerals. Dellisanti et al [31] used a planetary ball mill working under vacuum for mechanical treatment of montmorillonite particles. They observed the formation of mediumand high-temperature phases in relation to the different degrees of treatment.…”

Study of organically-modified montmorillonite clay for the removal of copper(II)

“…MMT shows the presence of three major thermal decomposition stages. The 1st stage (6.01%) occurs at 65 • C and is attributed to the adsorbed and interlayered water [19,32,34]. The 2nd stage (1.43%) occurs at 482 • C and may be attributed to the gradual loss of structural water suggested to represent the adjacent OH groups.…”

Thermochemical and catalytic properties of modified bentonites

“…The data of thermogravimetric analysis are presented in Table 2. According to the concept of bentonite dehydration, the first step in the TG curves represents the loss of physically adsorbed water, the second step corresponds to the loss of interlayer water, and the third step shows the loss of water forming as a result of the surface dehydroxylation [4,[12][13][14]. DTA curves for natural bentonites demonstrate two endothermic effects: the first one is in the range from 120 to 150 °C (the loss of adsorbed and interlayer water) and the second one is in the range from 580 to 600 °C (the surface dehydroxylation).…”

“…Though the thermochemical behavior of many natural bentonites has been studied [4,[12][13][14], there is a lack of the information about thermochemical properties of bentonites modified by different techniques. In particular, such data concerning bentonites modified with complex compounds of Pd(II) and Cu(II) catalyzing carbon monoxide oxidation with air oxygen are absent in literature.…”