Resumo

PINZON-BEDOYA, MARTHA LUCIA  e  VERA VILLAMIZAR, LUZ ESTELLA. KINETC MODELING BIOSORPTION OF Cr(III) USING ORANGE SHELL. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.160, pp.95-106. ISSN 0012-7353.

In this work it used as bioasorbent material orange peel for removing crhomium ions presents in hypothetical solutions diluted used as model of wastewater with low concentrations of this metal. The used operation conditions were: relationship solid/liquid 4 g/l, particle size F£0,425 mm, initial metal concentration of chromium solution were 100 mg/l (1,923 mmol/l), contact time of 60 h and constant pH (4 and 5). The chosen kinetic models to identify the mechanism reaction of bioasorption process using orgne shell were: first reversible order, pseudo-second order, Elovich and diffusion intraparticular. The results indicate that the Elovich equation provides the greatest accuracy for the kinetic data fit for the equilibrium experimental data. To evaluate the goodness of the fit of data was carried by non-linear regression using as approach the minimization of the function object it adds of the squares of the error, SSE, using as mathematical tool MATLAB.

Palavras-chave : Biosorption; Kinetics; Chromiun; Orange waste; Elovich Model.

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