Organo-clay complex adsorption

Cowan CT, White D (1962) Adsorption by organo-clay complexes. Clays Clay Miner 9 459-467... 

Cowan, C. T., Adsorption by Organo-Clay Complexes, Part 2, Clays and... 

The results of fractionation and characterization studies of naturally occurring organo-clay complexes in a B t-horizon of a black solonetz silty clay loam were reported by Arshad and Lowe (1966). This soil was predominantly montmorillonitic with relatively large amounts of kaolinite in the coarse fraction and only traces in the fine clay. The data indicated that more organic matter was associated with the coarse clay fraction than with the fine clay. The percentage of extractable organic matter increased with decrease in particle size. There was no evidence of adsorption of organic matter in the clay lattice. As... 

Jaynes. W.F. and Vance. G.F. BTEX adsorption by organo-clays cosorptive enhancement and equivalence of interlayer complexes. Soil Sci. Am. J., 60(6) 1742-1749, 1996. 

Clay minerals, oxides, and humic substances are the major natural subsurface adsorbents of contaminants. Under natural conditions, when humic substances are present, humate-mineral complexes are formed with surface properties different from those of their constituents. Natural clays may serve also as a basic material for engineering novel organo-clay products with an increased adsorption capacity, which can be used for various reclamation purposes. 

The metabolic activities of soil microorganisms are also significantly altered by surface adsorption on clays although very little is known yet about the interactions that take place between the indigenous population and soil surfaces. Soil phosphatases are also intimately associated with the soil organo-mineral complex and their adsorption on clay surfaces usually but not invariablyreduces enzyme activities. The mechanisms of adsorption of proteins, including enzymes, on clays and the effects on their properties have recently been reviewed . ... 

---