Análise das isotermas de adsorção de Cu(II), Cd(II), Ni(II) e Zn(II) pela N-(3,4-dihidroxibenzil) quitosana empregando o método da regressão não linear

Química Nova

Marilene Klug¹  Maria N. M. Sanches¹  Mauro C. M. Laranjeira¹  Valfredo T. Fávere¹  Clovis A. Rodrigues¹ 

关键词: chitosan;    nonlinear regression;    isotherms;   

DOI  :  10.1590/S0100-40421998000400006

来源: SciELO

【 摘 要 】

Adsorption of Cu(II), Ni(II), Pb(II) and Zn(II) ions from aqueous solutions by N-(3,4-dihydroxybenzyl) chitosan have been carried out. The Langmuir (L), Freundlich (F), Langmuir - Freundlich (LF), Redlich-Peterson (RP) and Tóth (T) adsorption isotherms models have been applied to fit the experimental data. Nonlinear regression computational program "Enzefitte", which is a library of the more commonly used adsorption isotherm equations for obtaining tabular outuput suitable for plotting theoretical of fitted isotherms, has been used to estimate the adsorption parameters. These parameters were used to calculate the amount adsorbed q calc., a function of concentration (C).

【 授权许可】

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