Restoration of Cation-Exchange Capacity of Nickel Montmorillonite by Hydrothermal Treatment.

Heavy-metal Uptake by a High Cation-exchange-capacity Montmorillonite: the Role of Permanent Charge Sites

A High Cation Exchange Capacity (HCM) montmorillonite clay has been prepared by acetate treatment of Zenith clay. The HCM has been evaluated for metal-uptake from aqueous solutions. The present data show that the cation exchange sites can play a significant role in the adsorption of metals in smectite clays. A theoretical analysis scheme has been developed which shows that permanent-charge site...

University of Groningen Effects of Acetate on Cation Exchange Capacity of a Zn-Containing Montmorillonite

Assessment of spatial variability of cation exchange capacity with kriging and cokriging

Cation exchange capacity (CEC) is one of the most important soil attributes which control some basic properties of soil such as acidity, water and nutrient retaining capacity. However, the measurement of cation exchange capacity in large areas is time consuming and requires high expenses. One way to save time and expenses is to use simple soil covariates and geostatistical methods in mapping CE...

Cation-Exchange Kinetics on Montmorillonite Using Pressure-Jump Relaxation

Batch and flow methods are usually not suitable for measuring kinetics of ion-exchange reactions on soils and soil constituents. These reactions are usually very fast. Thus, a rapid kinetic method must be employed. A pressure-jump relaxation technique was used in this study to investigate the kinetics of Ca-Na and Ca-K exchange on montmorillonite. Single relaxations were observed in both system...

etiology, significance, diagnosis and treatment of bruxiam

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