ISOTERMA DE FREUNDLICH: Es una isoterma de adsorción, que es una curva que relacionala concentración de un soluto en la superficie de un adsor. de adsorción Freundlich, Langmuir y Prausnitz-Radke. Estos modelos de isotermas se representan matemáticamente por las ecuaciones siguientes: q = KC 1. Isoterma de adsorción de Freundlich para la adsorción de colorante azo RD23 en CAG (Filtrasorb ). Ecuación de Freundlich: x/m = K f Ce 1/n = C.

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A presentation of colloid chemistry and related fields] Leipzig, Germany: On pages Helmholtz derives the Ostwald-Freundlich equation and subsequently converts Kelvin’s equation into the Ostwald-Freundlich equation. April Learn how and when to remove this template message. Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources.

Freundlich equation – Wikipedia

Distribution constant Freundlich equation Kovats retention index Retention factor Van Deemter equation. The Freundlich equation or Freundlich adsorption isotherman adsorption isothermis an empirical relation between freundlihc concentration of a solute on the surface of an adsorbent to the concentration of the solute in the liquid with which it is in contact.

Beyond that point, the rate of adsorption saturates even after applying higher pressure. See rock microstructure for more. Thus, the Freundlich adsorption isotherm fails at higher pressure. By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved from ” https: Views Read Edit View history. One consequence of this relation is that small liquid droplets i.


As this relationship is entirely empirical, in the case where adsorption behavior can be properly fit by isotherms with a theoretical basis, it is usually appropriate to use such isotherms instead see for example the Langmuir and BET adsorption theories.

Affinity chromatography Column chromatography Displacement chromatography Electrochromatography Gas chromatography High-performance liquid chromatography Capillary electrochromatography Ion chromatography Micellar electrokinetic chromatography Normal-phase chromatography Paper chromatography Reversed-phase chromatography Size-exclusion chromatography Thin-layer chromatography Two-dimensional chromatography. By using this site, you agree to the Terms of Use and Privacy Policy.

Volume 57, Issue 4, pages From Wikipedia, the free encyclopedia. From Wikipedia, the free encyclopedia. K and n are constants for a given adsorbate and adsorbent at a particular temperature. Akademische Verlagsgesellschaft,page See equation 2 on page This page was last edited on 20 Septemberat Category Commons Analytical Chemistry.

ecuacjon Ostwald ripening is thought to occur in the formation of orthoclase megacrysts in granites as a consequence of subsolidus growth. Articles needing additional references from April All articles needing additional references. The Ostwald—Freundlich equation governs boundaries between two phases ; specifically, it relates the surface tension of the boundary to its curvaturethe ambient temperature, and the vapor pressure or chemical potential in the two phases.

Retrieved from ” https: Assuming that the vapor obeys the ideal gas lawthen. Gas chromatography—mass spectrometry Liquid chromatography—mass spectrometry Pyrolysis—gas chromatography—mass spectrometry.


According to Lord Kelvin’s equation of[6] [7]. This article needs additional citations for verification. This ferundlich was last edited on 29 Decemberat Views Read Edit View history. Another notable example of this relation is Ostwald ripeningin which surface tension causes small precipitates to dissolve and larger ones to grow. Kapillarchemie, eine Darstellung der Chemie der Kolloide und verwandter Gebiete.

Freundlich equation

It is used in cases where the actual identity of the solute is not known, such as adsorption of colored material from sugar, vegetable oil etc.

InHerbert Freundlich gave an expression representing the isothermal variation of adsorption of a quantity of gas adsorbed by unit mass of solid adsorbent with pressure. In his dissertation ofRobert von Helmholtz son of the German physicist Hermann von Helmholtz derived the Ostwald—Freundlich equation and showed that Kelvin’s equation could be ecuacioj into the Ostwald—Freundlich equation.

InLord Kelvin William Thomson obtained the following relation governing a liquid-vapor interface: