Effect on adsorption behavior

However, after the study of inosine-substituted ODN, there was evidence that the pretreatment improved the electrochemistry of purine bases, with a smaller effect on the interfacial accumulation [78]. The G oxidation signal was strongly affected by the surface pre-treatment of CP. However, the inosine-modified probe response was less affected by this treatment [78], suggesting a lesser effect on adsorption over the electrochemistry of purine base. However, if inosine (a non-purine base) substituted G in the ODN sequence, the stability of the adsorbed probe on CP was similar to that observed with G-containing ODN, i.e., being stable in a stirred PBS for up to 15 min. Such behavior indicated that the inosine substitution has little effect upon the stability of the adsorbed probe [78]. 

When coupled with surface adsorption and diffusion, the geometry of catalytic arrays has interesting effects on catalytic behavior examples of this type of reaction engineering models are shown in Figs. 2 and 3, by Kuan et al. [8, 9], respectively. 

It is thus seen that interpretation of Tafel slopes requires information on adsorption behavior as /(F), complementary to that as /(C,). The derivative dln6/d nC, required for interpretation of reaction order, R = dlni/dlnC, must also be taken at a controlled potential that is, d n6/d nC,)y/, the isotherm derivative in the reaction-order expression (Section X), must also be evaluated at constant overpotential, r , or electrode potential, V, in the case of electrocatalytic reactions, especially those involving small organic molecules or Cl. Unfortunately, in many experimental works on electrode kinetics, except those on pH effects, these important details involving the adsorption behavior of reactant and/or intermediate(s) have been neglected, with adverse consequences for mechanism determination. 

The influence of the molecular mass on the adsorbed PVFA-co-PVAm-95 fraction shown in Fig. 3, is detectable, in particular for pure aqueous solutions which do not contain KC1. Here, the amount of adsorbed PVFA-co-PVAm increases significantly with increasing molecular weight of PVFA-co-PVAm when KC1 is added to the aqueous solutions, however, the effect of molecular weight on adsorption behavior is not clearly detectable. 

Leng, C.C. and Pinto, N.G. (1997). Effects of surface properties of activated carbons on adsorption behavior of selected aromatics. Carbon, 35, 1375—85. 

Lakatos., I., Lakatos-Szabo, J., Toth, J., 1979. Eactors influencing polyacrylamide adsorption in porous media and their effect on flow behavior, Paper presented at the Symposium on Surface Phenomena in EOR, Stockholm, August, Plenum. 

Al-Degs, Y.S., et al.. Effect of solution pH. ionic strength, and temperature on adsorption behavior of reactive dyes on activated carbon. Dyes Pigments, 77, 16. 2008. 

The advantages of the in situ radioiodination technique include extremely high sensitivity and avoidance of any effects of prelabelling on adsorption behavior. The in situ radioiodination (or iodogram ) technique has proven very useful because of its ability to detect the presence of unsuspected proteins in the adsorbed layer, including hemoglobin. In addition, this technique was used to detect variations in the composition of the protein layer adsorbed from plasma that were induced by either differences in the chemical properties of the surface or by differences in the plasma contact time (13.). However, the in situ radioiodination method is not quantitative due to differential and largely unpredictable uptake of iodine by each of the adsorbed proteins. 

Mori T, Inamine I, Wada R, Hida T, Kiguchi T, Satone H et al (2009) Effects of particle concentration and additive amount of dispersant on adsorption behavior of dispersant to alumina particles. J Ceram Soc Jpn 117 917-921... 

Standard nanosilicas A-300 and A-380 (Sbet=337 and 378 mVg, pore volume Vp=0.714 and 0.943 cm /g, respectively, estimated from LT [77.4 K] adsorption isotherms of nitrogen) were heated at 673 K for several hours to remove adsorbed organics and residnal HCl and rehydrated in air. Silica 200DF (Crosfield, Sbet=540 mVg, Fp=0.34 cmVg) possessing nanopores and narrow mesopores was used to compare intrapartiele (200DF) and textural (nanosilica) porosity effects on the behavior of bound water and coadsorption of water and methane. Bidistilled water and conunercial methane (99% purity) were used (Gun ko et al. 2011c). 

FACTORS INFLUENCING POLYACRYLAMIDE ADSORPTION IN POROUS MEDIA AND THEIR EFFECT ON FLOW BEHAVIOR... 

The influence of the coion identity on adsorption behavior has also been investigated. The CigTAC system was chosen to investigate this effect, as the presence of added chloride has little influence on the maximum surface excess or the aggregate morphology. The rates of adsorption for C gTAC in the presence of 10 mM KCl, NaCl, and LiCl were determined. The results for the three different coions were ahke, indicating that the coion identity has no effect on the adsorption rate. 

When comparing Figs 9 and 18, one can see that cation and anion adsorption is symmetrically inverted through lines perpendieular to the pH axis. Qualitatively, the adsorption behavior can be seen to decrease with increasing pH for anions in Fig. 18 while the opposite pH dependence is seen in Fig. 9 for cation adsorption. Quantitatively, differenees in mass aetion adsorption constants have opposite effects on adsorption of cations and anions. The role of solute concentration on anion and cation adsorption is the same. 

Stem layer adsorption was involved in the discussion of the effect of ions on f potentials (Section V-6), electrocapillary behavior (Section V-7), and electrode potentials (Section V-8) and enters into the effect of electrolytes on charged monolayers (Section XV-6). More speciflcally, this type of behavior occurs in the adsorption of electrolytes by ionic crystals. A large amount of wotk of this type has been done, partly because of the importance of such effects on the purity of precipitates of analytical interest and partly because of the role of such adsorption in coagulation and other colloid chemical processes. Early studies include those by Weiser [157], by Paneth, Hahn, and Fajans [158], and by Kolthoff and co-workers [159], A recent calorimetric study of proton adsorption by Lyklema and co-workers [160] supports a new thermodynamic analysis of double-layer formation. A recent example of this is found in a study... 

Surface heterogeneity may merely be a reflection of different types of chemisorption and chemisorption sites, as in the examples of Figs. XVIII-9 and XVIII-10. The presence of various crystal planes, as in powders, leads to heterogeneous adsorption behavior the effect may vary with particle size, as in the case of O2 on Pd [107]. Heterogeneity may be deliberate many catalysts consist of combinations of active surfaces, such as bimetallic alloys. In this last case, the surface properties may be intermediate between those of the pure metals (but one component may be in surface excess as with any solution) or they may be distinctly different. In this last case, one speaks of various effects ensemble, dilution, ligand, and kinetic (see Ref. 108 for details). 

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