Cation-exchange parameter

Hydrogen bond basicity (p) Cation-exchange parameter (k ) Hydrogen bond basidly (B)... 

H hydrophobic interaction parameter 5 steric selectivity parameter A H-bond donor (acidity) parameter B H-bond acceptor (basicity) parameter C cation-exchange parameter (at dissociated silanols)... 

In an attempt to verify (or refute) this assumption, we have determined the thermodynamic parameters (AH, AS) for the complexes formed between Pu(III), Pu(IV), and HSOi in 1 M acid media utilizing cation-exchange and solvent extraction procedures. 

The main parameters that affect the cost-effectiveness of soil washing include the physicochemical parameters of the soil (grain size distribution, cation exchange capacity, percentage of silt, clay, or organic matter), and the type and concentration of contaminants. 

Figure 4.7 Calculated changes in pe, pH, [O2] and [Fe +] in an idealized soil during reduction. Mineral phases Fe(OH)3 and Fe3(OH)g. Parameters for pH buffering and cation exchange differ between (a)-(d) as indicated. Units of fees (soil pH buffer power), mmolkg pH CEC (initial cation exchange capacity), cmolc kg and [X ]l (concentration of non-carbonate anions), mM. CO2 pressure = lOkPa, 9 = 0.6, p = 1.0, initial pH = 4.5...

One of the parameters in the broad class of liquid adsorption mechanisms is the interaction between the acidic and basic sites of the adsorbent and the adsorbate. The acidity of zeolitic adsorbent is normally affected by the zeolite Si02/Al203 molar ratio, the ionic radii and the valence of the cations exchanged into the zeolite. In this contribution, Sanderson s model of intermediate electronegativity of zeolitic adsorbent acidity (SjJ can be calculated as a representation of the strength of the adsorbent acidity based on the following equation ... 

Various parameters such as the heat of oxide formation, ionic potential, electronegativity, and the extent of cation exchange have been proposed to control the redox properties. However, a full understanding is lacking. Nonetheless, the following trends are evident ... 

The kinetics of the hydration reaction of cyclopentene with a strongly acidic cation-exchange resin as catalyst have been studied. Parameters of the intrinsic kinetics model were solved by the Gauss-Newton method based on the experimental data, after excluding the influence factors of internal and external diffusion 34... 

Based on their data for sorption onto a lake sediment, Kiewiet et al. (1996) derived an equation predicting sorption coefficients of CnEOms as a functions of alkyl chain length and the number of oxyethylene units. Di Toro et al. (1990) proposed a model for description of sorption of anionic surfactants which includes sorbent properties (organic carbon content, cation exchange capacity, and particle concentration) and the CMC as a function of the solution properties (ionic strength, temperature). The CMC is used as a relative hydrophobicity parameter. Since the model takes the contribution of electrostatic as well as hydrophobic forces explicitly into account, it is an example of an attempt to model surfactant behavior on the basis of the underlying mechanisms. 

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