Illite layers effects

Effect of Temperature. Temperature had little effect on the percentage of illite layers formed from K-Kinney, which was subjected to as many as 6 WD cycles at 30°, 60°, and 90°C, and then saturated twice with 0.1 N SrCl2 (Table Vlll). Unfortunately, the experimental products were not X-rayed after a single Sr-saturation therefore, results in Table VIII are not directly comparable to those in Table IV. The erratic data resulting from the 90°C experiments are unexplained. 

Table VIII. Effect of Temperature on the Formation of Illite Layers in K-Kinney Submitted to Wetting and Drying Cycles, and Then Exchanged Twice With 0.1 N SrCl2...

The CEC of clay minerals is partly the result of adsorption in the interlayer space between repeating layer units. This effect is greatest in the three-layer clays. In the case of montmorillonite, the interlayer space can expand to accommodate a variety of cations and water. This causes montmorillonite to have a very high CEC and to swell when wetted. This process is reversible the removal of the water molecules causes these clays to contract. In illite, some exchangeable potassium is present in the interlayer space. Because the interlayer potassium ions are rather tightly held, the CEC of this illite is similar to that of kaolinite, which has no interlayer space. Chlorite s CEC is similar to that of kaolinite and illite because the brucite layer restricts adsorption between the three-layer sandwiches. 

However, there is not enough information available to determine the effect of montmorillonite 2 1 layer compositions on ion selectivity. We can only base our analysis upon the observation that in rocks where potassium is available, an interlayered illite-montmorillonite phase appears near 100°C at depths greater than 2Km. 

Clay size layer silicates also have the ability to catalyze the polycondensation of phenolic compounds and amino acids. Wang et al. (1985) examined the catalytic effect of Ca-illite on the formation of N-containing humic polymers in systems containing various phenolic compounds and amino acids. The yields and N contents... 

Soil wettability is another important factor besides contamination, which governs water retention and transport processes [97]. Strong interaction of mineral phases with CDs suggests that the properties of the soils may also be seriously affected by CDs, which may have an influence on soil remediation processes. The effect of RM-/9-CD on surface and pore properties of common clay minerals such as bentonite, illite and kaohnite had been studied and it was found that the wettability of the soil decreased at low CD concentration and increased again at the highest load. The increased concentration of CDs reduced the effective radius of the soil bed which improved the average force of interaction among soil particles via water layer, despite the simultaneous decrease of adhesion forces of water to the soil. 

Only one detailed study has systematically examined the effects of diagenesis on lanthanide distributions. Chaudhuri and Cullers (1979) analysed Miocene/Pliocene sediments from a deep well (1.8-4.8km depth) in the Gulf Coast of Louisiana, which was sampled through the illite/montmorillonite mixed layer of illite transition. Such variability as was seen in absolute lanthanide abundances and in La/Yb ratios was correlated to changes in provenance rather than to diagenetic factors. 

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