Resumo

MURILLO, Yesid S; GIRALDO, Liliana  e  MORENO, Juan Carlos. DETERMINATION OF THE 2,4-DINITROFENOL ADSORPTION KINETIC ON BOVINE BONE CHAR BY UV-VIS SPECTROPHOTOMETRY. Rev.Colomb.Quim. [online]. 2011, vol.40, n.1, pp.91-103. ISSN 0120-2804.

Adsorbent material was obtained by heat treatment of bovine bone. This char has a surface area of 171 m²g^-1, textural characteristics of a mesoporous material, and presence of the principal component of bone matrix-hidroxiapatite. The 2,4-dinitrophenol adsorption from aqueous solution in function of time was carried on the charred and determined the kinetics of adsorption by models of pseudo-first and pseudo second order. Additionally, we identified the diffusion mechanism through intraparticle diffusion model. The experimental kinetic data are more correlated with the pseudo second order model. The intraparticle diffusion model shows that the adsorption process is governed by stage where the diffusion particle mechanism is the rate-limiting.

Palavras-chave : Kinetic adsorption; 2,4-dinitrophenol; char bovine bone; adsorption from solution.

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