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B Adsorption Isotherms

The fundamental equation for calculating the amount of one component (component 1) of a binary solution adsorbed onto a solid adsorbent is (Aveyard, 1973a) [Pg.42]

X2 = the mole fractions of components 1 and 2 at adsorption equilibrium, m = the mass of the adsorbent, in grams, n, ns2 = the number of moles of components 1 and 2 adsorbed per gram of adsorbent at adsorption equilibrium. [Pg.43]

When the liquid phase is a dilute solution of a surfactant (component 1) that is much more strongly adsorbed onto the solid adsorbent than the solvent (component 2), then oAXi Ami where A = the change in the number of moles of component 1 in solution, n2 0,and %2 1. Thus [Pg.43]

Ci o = the molar concentration (in moles/liter) of component 1 before adsorption, in the liquid phase, [Pg.43]

B. Adsorption Isotherms from Two-Dimensional Equations of State... [Pg.623]

Fig. 3.15 (a) A pore in the form of an interstice between close-packed and equal-sized spherical particles. The adsorbed him which precedes capillary condensation is indicated, (b) Adsorption isotherm (idealized). [Pg.130]

B. Adsorption isotherm of Pseudocyanine in colloidal silver calculated from the spectral data of Figure 4A. See text for details... [Pg.189]

Figure 8A. Adsorption isotherms of Pseudocyanine (No. 1, Circles) and of Astraphloxin (No. 2, Squares) in AgBr (Dispersion D) containing 0.2% gelatin at 23°C., pBr 3, pH 6.5. The data are expressed as the concentration of free dye (c) in equilibrium with dye adsorbed per mole of AgBr (a). Open data points and solid lines Results calculated from surface spectra. Solid data points and dashed lines Results obtained from phase-separation procedure B. Adsorption isotherms of Figure 8A expressed in terms of the Langmuir equation. See text... Figure 8A. Adsorption isotherms of Pseudocyanine (No. 1, Circles) and of Astraphloxin (No. 2, Squares) in AgBr (Dispersion D) containing 0.2% gelatin at 23°C., pBr 3, pH 6.5. The data are expressed as the concentration of free dye (c) in equilibrium with dye adsorbed per mole of AgBr (a). Open data points and solid lines Results calculated from surface spectra. Solid data points and dashed lines Results obtained from phase-separation procedure B. Adsorption isotherms of Figure 8A expressed in terms of the Langmuir equation. See text...
Figure 7. Adsorption properties of ferro-carbon particles. (A) Absorption spectra of supernatant fluid after mixing methylene blue solution with the adsorbents and magnetic sedimentation of them. FC-2,3,4 adsorb methylene blue more efficiently, than Cefesorb. (B) Adsorption isotherm of methylene blue on FCM. (C) Kinetics of doxorubicin sorption on FC-4. The adsorption process is rapid, and it takes about 1 h to reach saturation. (D) Kinetics of doxorubicin desorption from FCA. The drug is slowly released in about 14—15 days. Figure 7. Adsorption properties of ferro-carbon particles. (A) Absorption spectra of supernatant fluid after mixing methylene blue solution with the adsorbents and magnetic sedimentation of them. FC-2,3,4 adsorb methylene blue more efficiently, than Cefesorb. (B) Adsorption isotherm of methylene blue on FCM. (C) Kinetics of doxorubicin sorption on FC-4. The adsorption process is rapid, and it takes about 1 h to reach saturation. (D) Kinetics of doxorubicin desorption from FCA. The drug is slowly released in about 14—15 days.
Flfure 2.28. Adsorption of long-chain alkanes from n-heptane on various grades of graphite, (a, left). Enthalpy isotherms for n-docosane (n-CjjH g) (a, right), correlation with the enthalpy of adsorption for a reference sample (b) adsorption Isotherms for four alkanes on Vulcan 3G. (Redrawn from H.E. Kem, G.H. Findenegg, J. Colloid Interface Set 75 (1980) 346.)... [Pg.223]

Figure 2 (a) coverage fluctuations, and (b) adsorption isotherms for h 0 and different values of O. [Pg.633]

Surface activity (a) strength and mode of adsorption (b) adsorption isotherms (c) adatom formation (d) substrate-catalyst interactions (e) surface diffusion (f) adsorbate spillover (g) bulk electronic properties (h) surface electronic properties. [Pg.239]

Fig. 6. (a) Adsorption isotherms of water vapour on a -90% faujasite-rich tuff (enriched sample) from Aritayn (north-east Jordan) (squares) a chabazite-rich tuff (47% chabazite, 16% phillipsite) from Vulsini (central Italy) (triangles) and a 44% clinoplilolitc-rich tuff from Palestra (north-east Greece) (circles), at 25°C [74], Non-adsorbent phases are not reported, (b) Adsorption isotherms of sulfur dioxide on the same materials (same symbols) at the same temperature. Filled symbols ammonia adsorption on Aritayn faujasite. [Pg.27]

Fig. 14 a GIR-FTIR spectra of NHS - CIO SAM after reaction with G4 PAMAM dendrimers for various times (4.5 x 10" M methanolic solution of PAMAM G4). b Adsorption isotherm of PAMAM G4 on NHS-CIO. The solid line corresponds to the fit of the Langmuir isotherm (reprinted with permission from [77], copyright (2004), American Chemical Society)... [Pg.192]

FIGURE 6.2 (A), (B) Adsorption isotherms of Cu(II) ions on activated carbons as a function of pH of the solution. (Source Goyal, M., Rattan, V.K., Aggarwal, D., and Bansal, R.C., Colloids and Surfaces, A Physico-Chem. andEngg. Aspects, 190,229,2001. With permission.)... [Pg.308]

Figure 16 (a) p-OctanoylcaUx[4]arene (3), its crystal packing, and capsular structure, (b) Adsorption isotherms for the capsular form... [Pg.2483]

FIGURE 7.5 (a) Typical phase diagram of fluid near the surface, (b) Adsorption isotherms at different... [Pg.226]

Figure 3.3.41 (a) Comparison of equilibrium loading (adsorption isotherm) for different (pure) gases (b) adsorption isotherms of... [Pg.123]

Figure 4. Krypton (a) and nitrogen (b) adsorption isotherms on the samples with increasing nanotube purity (XO to XlOO). Figure 4. Krypton (a) and nitrogen (b) adsorption isotherms on the samples with increasing nanotube purity (XO to XlOO).
Figure 6.2. (a) Sticking coefficient as a function of coverage in the case of direct adsorption and a mobile precursor (b) adsorption isotherm of NO on the (111) surface of rhodium showing the effect of the precursor mechanism (from Borg et ai, 1994). [Pg.221]

Figure 7.2 (a) Comparison of two adsorptions that of nitrogen on silica is a physical BET adsorption at 77 K (curve 1), while oxygen s adsorption on charcoal at 150 K (curve 2) is a chemical Langmuir adsorption. Notice that the y-axis is the pressure divided by the saturation pressure, (b) Adsorption isotherm for nitrogen on silica gel in the linearized form of the BET equation, Equation 7.2. From Shaw (1992)... [Pg.164]

Fig. 6.30 Dilution of aqueous solution of (dodecyldimethylammonio) butanoate (C12N3C) and its adsorption onto Spherosil XOB015 (Sbet = 25m g ) at 298 K (a) enthalpy of dilution, (b) adsorption isotherm, (c) differential molar enthalpy of displacement. In both types of titration calorimetry experiment, a 0.3 mol kg C12N3C solution in pure H2O was used... Fig. 6.30 Dilution of aqueous solution of (dodecyldimethylammonio) butanoate (C12N3C) and its adsorption onto Spherosil XOB015 (Sbet = 25m g ) at 298 K (a) enthalpy of dilution, (b) adsorption isotherm, (c) differential molar enthalpy of displacement. In both types of titration calorimetry experiment, a 0.3 mol kg C12N3C solution in pure H2O was used...
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