Reanalysis of boron adsorption on soils and soil minerals using the constant capacitance model

摘要: Inclusion of microscopic information improved the ability constant capacitance model to provide a quantitative description B adsorption on various Al and Fe oxides, clay minerals, arid-zone soils as function solution pH. The same set surface complexation reactions was used for all adsorbing surfaces. This study tests describe using configurations that had been observed experimentally. In present application, both trigonal, B(OH){sub 3}, tetrahedral, 4}{sup {minus}}, complexes are postulated, consistent with experimental spectroscopic results. Boron constants oxides kaolinites not statistically significantly different from each other. those 2:1 clays soils. other, reflecting dominance minerals in Average sets provided adequate descriptions behavior adsorbents studied, indicating some predictive capability. able predict additional usingmore » average constants.« less