Mineralogical heterogeneity

The term pHznc in Equation 3.24 represents the point of zero net charge (PZNC). It is the pH value at which the cation exchange capacity equals the anion exchange capacity (Fig. 3.28). Equation 3.24 shows that pHznc varies with ionic strength (n), whereas pH0 or PZC is an intrinsic property of the mineralogically heterogeneous soil (Uehara and Gillman, 1980). 

Kulkarni, R.D. and Somasundaran, P., Mineralogical heterogeneity of ore particles and its effects on their interfacial characteristics, Powder Technol., 14, 279, 1976. 

Creek County, OK, 3) San Andres Formation, Wasson Field, Yoakum County, TX. The primary purpose of presenting these is to illustrate the geometric and mineralogical heterogeneity of typical reservoir cores, and the SEM in Figure 1 illustrate these points quite graphically. The basic sand matrix is clearly visible in... 

AMD are often very heterogeneous and reactive systems. Therefore, to describe their properties is often an issue of analytical concern as it is difficult to obtain representative samples of the affected watercourses. The instability of AMD is related to the formation and transformations of ochre-products, such as jarosite, schwertmannite and goethite (Bigham et al. 1996). Mineralogical transformations involving these ochre-precipitates have been the subject of intensive research (Kawano Tomita 2001 Kim et al. 2002 Knorr Blodau... 

White, A. F. (1990), "Heterogeneous Electrochemical Reactions Associated with Oxidation of Ferrous Oxide and Silicate Surfaces", Reviews in Mineralogy 23,467-509. 

Barber, L.B., Thnrman, E.M., and Rnnnells, D.D. Geochemical heterogeneity in a sand and gravel aquifer effect of sediment mineralogy and particle size on the sorption of chlorobenzene, J. Contam. Hydrol., 9 35-54, 1992. 

Rimsaite, J. 1982. Mineralogical and petrochemical properties of heterogeneous granitoid rocks from radioactive occurrences in the Grenville structural province, Ontario and Quebec. In Maurice, Y.T. (ed) Uranium in Granite. Geological Survey of Canada, SI-23, 19-30. 

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