%0 Journal Article %T Comment on ¡°Equilibrium sorption isotherm studies of Cd(II), Pb(II) and Zn (II) ions detoxification from waste water using unmodified and EDTA-modified maize husk¡± %A Cavas %A Levent %J Electronic Journal of Biotechnology %D 2008 %I Pontificia Universidad Cat¨®lica de Valpara¨ªso %X the citing and using of correct version of mathematical equations are of great importance in the writing of a scientific paper. this paper presents the possible errors related to dubinin-radushkevich equation in an article by igwe and abia (2007) which was published in electronic journal of biotechnology, 10(4); 536-548. %K adsorption %K calculation errors %K dr equation. %U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-34582008000200001&lng=en&nrm=iso&tlng=en