Sorption competitive

Pigna M, Colombo C, Violante A (2003) Competitive sorption of arsenate and phosphate on synthetic hematites (in Italian). Proceedings XXI Congress of Societa Italiana Chimica Agraria SICA (Ancona), pp 70-76 Quirk JP (1955) Significance of surface area calculated from water vapour sorption isotherms by use of the B. E. T. equation. Soil Sci 80 423-430 Rancourt DG, Fortin D, Pichler T, Lamarche G (2001) Mineralogical characterization of a natural As-rich hydrous ferric oxide coprecipitate formed by mining hydrothermal fluids and seawater. Am Mineral 86 834-851 Raven K, Jain A, Loeppert, RH (1998) Arsenite and arsenate adsorption on ferrihydrite kinetics, equilibrium, and adsorption envelopes. Environ Sci Technol 32 344-349... 

Xing B, Pignatello J (1998) Competitive sorption between 1,3-dichlorobenzene or 2,4-dichlorophenol and natural aromatic acids in soil organic matter. Environ Sci Techno 1 32 614-619... 

Ali, M.A. Dzomback, D.A. (1996a) Competitive sorption of simple organic acids and sulfate on goethite. Environ. Sci. Techn. 30 1061-1071... 

Christl, I. R. Kretzschmar (1999) Competitive sorption of copper and lead at the oxide-water interface Implications for surface site density. Geochim. Cosmochim. Acta 63 2929-2938... 

Kaiser, K. Zech,W. (1997) Competitive sorption of dissolved organic matter fractions to soils and related mineral phases. Soil Sci. 

Xia, G., and W. P. Ball, Polany-based models for the competitive sorption of low-polarity organic contaminants on a natural sorbent , Environ. Sci. Technol., 34, 1246-1253 (2000). 

Xing, B., J. J. Pignatello, and B. Gigliotti, Competitive sorption between atrazine and other organic compounds in soils and model sorbents , Environ. Sci. Technol., 30, 2432-2440 (1996). 

However, more recently competitive sorption has been reported and is thought to be the result of site-specific sorption occurring in soil organic matter (Xing et al., 1996 Xing and Pignatello, 1998). 

When the gas or vapor feed stream contains a component that is highly soluble in the polymer membrane and causes plasticization, then the selectivity as defined by Equation 4.6 will depend on the partial pressure or the amount of the plasticizing component sorbed into the membrane. Furthermore, pure-gas permeation measurements are generally not a good indicator of the separation performance, and mixed-gas permeation measurements will be needed [21-23]. Often, the mixed-gas selectivity is less than predicted from pure-gas measurements [8] however, the opposite has been observed [24], Competitive sorption effects can also compromise the prediction of mixed-gas behavior from pure-gas measurements [25], For gas pairs where each component is less condensable than C02, like 02/N2, it is generally safe to conclude that the selectivity characteristics can be accurately judged from pure-gas permeabilities at all reasonable pressures. When the gas pair involves a component more condensable than C02, plasticization is likely to be a factor and pure-gas data may not adequately reflect mixed-gas selectivity. When C02 is a component, the situation depends on the partial pressures and the nature of the polymer. 

Visser, T., Koops, G.H. and Wessling, M. (2005) On the subtle balance between competitive sorption and plasticization effects in asymmetric hollow fiber gas-separation membranes. Journal of Membrane Science, 252, 265-277. 

All chemicals were laboratory grade and dissolved in distilled water. The medium was sterilized by autoclaving, and sorption experiments were performed in sealed 150-mL serum bottles. Subsequent tests for in situ use may need to be performed at mesophilic fermentation temperatures. In a similar manner, the sorbents were also tested for their capacity for the substrate of the possible fermentation, glucose, at a concentration of about 5 g/L. Frequently the glucose was included in the fermentation medium for competitive sorption. 

Repetitive Competitive Sorption of Succinic Acid in Medium with Glucose at pH 2.0 and 6.0"... 

Li J, Werth CJ (2001) Evaluating competitive sorption mechanisms of volatile organic compounds in soils and sediments using polymers and zeolites. Environ Sci Technol 35 568-574... 

Kretzschmar, R. and Voegelin, A., Modeling competitive sorption and release of heavy metals in soils, in Heavy Metals Release in Soils, Selim, H.M. and Sparks, D.L., Eds., CRC Press, Boca Raton, FL, 2001, chap. 3. 

Xia, K. Pierzynski, G. Competitive Sorption between Oxalate and Phosphate in Soil An En-... 

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