Clay minerals and soils

Goldberg S., Forster H.S., Heick E.L. Boron adsorption mechanisms on oxides, clay minerals and soils inferred from ionic strength effects. Soil Sci Soc Am J 1993 57 704-708. 

Murad, E. (1990) Application of Fe Mossbauer spectroscopy to problems in clay minerals and soil science possibilities and limitations. Adv. Soil Sci. 12 125-157... 

Davies, J. E. D., and Jabeen, N. (2002). The adsorption of herbicides and pesticides on clay minerals and soils. Part 1. Isoproturon. J. Inclusion Phenom. Macrocyclic Chem. 43(3 4), 329-336. 

Sparks and Jardine (1984) found that the first-order equation best described potassium adsorption kinetics on clay minerals and soils. However, Havlin and Westfall (1985) reported that the power-function equation described nonexchangeable potassium release kinetics better than first-order or a number of other models. 

Sparks, D. L. (1965). Kinetics of ionic reactions in clay minerals and soils. Adv. Agron. 38, 231-266. 

Ogwada, R. A., and Sparks, D. L. (1986c), Kinetics of ion exchange on clay minerals and soil. II. Elucidation of rate-limiting steps. Soil Sci. Soc. Am. J. 50, 1162-1164. 

Figure 9.15. Relationship between critical salt concentrations for reference clay minerals and soil clays in mixed-ion systems (raw data were taken from Arora and Coleman, 1979).

TABLE 9.4. Influence of pH on the Critical Salt Concentration (NaHCOj) of Reference Clay Minerals and Soil Clays... 

A pyrohydrolytic technique has been described for decomposing various inorganic fluorine-containing materials, including minerals.55 The temperature recommended is 1200 °C and the aqueous solution containing F is determined by a conventional titrimetric method. Fluorine on the surface of metallic samples can be determined rapidly and non-destructively by means of the prompt y-photons (837 keV resonance) of the 19F(p,ay)160 reaction 56 the experimental sensitivity of the method is approximately 5 x 10-4 (/xg F ) cm-2. The use of an electrode sensitive to F- to measure the adsorption of F by clay minerals and soils has been investigated.57... 

At the end of the seventies Garcia-Miragaya and Page [8,9] and Street et al. [10] reported a successful correlation by Freundlich equation of the data of trace Cd + adsorption by both clay minerals and soils. Benjamin and Leckie [11] found the same for the trace adsorption of Cu ", Zn +, Cd + and Pb + onto amorphous iron oxyhydroxide. The use of Freundlich equation was also suggested in the works by Sposito [12,13]. 

Goldberg, S., Su, C., and Forster, H. S. (1998). Sorption of molybdenum on oxides, clay minerals, and soils mechanisms and models. In Adsorption of Metals by Geomedia Variables, Mechanisms, and Model Applications, ed. Jenne, E. A., Proc. American Chemical Society Symposium, Academic Press, San Diego, CA, 401-426. 

Ogwada, R.A., and D.L. Sparks. 1986c. Kinetics of ion exchange on clay minerals and soil. 

Adsorption studies showed that DSMA was readily adsorbed by various clay minerals and soil particles in the order limionite > kaolinite >> vermiculite > montmorillonite > silt = sand 193). No specific adsorption mechanism was postulated, but later arsenic was associated with aluminum 197). 

Particular attention has been paid to the discussion of the fractal approach to the adsorption of gases by clay minerals and soils. Further promising developments are expected when applying fractal concepts in new environmental fields. For example, promising research has been conducted very recently on the fractal description of ion adsorption and on the infiuence of surface roughness on the electric properties of the double layer [124, 125]. Processes and models leading to the preparation of adsorbents with fl-actal surfaces have also been investigated [126]. 

Bell, F.G. 1996a. Lime stabilization of clay minerals and soils. Engineering Geology, 42, 223-237. 

Bower, C. A., 1963. Adsorption of o-phenanthroline by clay minerals and soils. Soil ScL 95 192. Bradley, W. F., 1945. Diagnostic criteria for clay minerals. Am. Mineral 30 704. 

Richahds, G. E., and E. O. McLean, 1963. Potassium fixation and release by clay minerals and soil clays on wetting and drying. Soil Sci. 95 308. 

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