Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/26108
Type: Artigo de periódico
Title: A study of the process of desorption of hexavalent chromium
Author: Amorim, W.B.
Hayashi, A.M.
Pimentel, P.F.
Silva, M.G.C.da
Abstract: In this work the process of desorption of hexavalent chromium, a toxic metal ion, from the marine algae Sargassum sp, following biosorption experiments 2³ factorial design was studied. A technique was applied to three eluents: HCl, H2SO4 and EDTA. Three factors of importance were evaluated: concentration of eluent, the ratio between mass of biosorbent and volume of eluent (S/L) and process time. A statistical analysis of the experimental results showed that the three variables evaluated are significant for all three eluents. The models for chromium desorption were validated, as the results agreed well with the observed values. Through use of the response surface methodology, a factorial design based optimization technique; it was possible to identify the most suitable eluent and the interval of values for the process variables that resulted in the most significant desorption of chromium, which is relevant information for work aiming at process optimization.
Subject: desorption
marine algae
chromium
Editor: Brazilian Society of Chemical Engineering
Rights: aberto
Identifier DOI: 10.1590/S0104-66322003000300008
Address: http://dx.doi.org/10.1590/S0104-66322003000300008
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322003000300008
Date Issue: 1-Sep-2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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