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Adsorption of As(III) on chitosan-Fe-crosslinked complex (Ch-Fe)

2010; Elsevier BV; Volume: 82; Issue: 2 Linguagem: Inglês

10.1016/j.chemosphere.2010.09.033

1879-1298

Helen Helena dos Santos, Carla Albertina Demarchi, Clóvis Antônio Rodrigues, Jean‐Marc Grenèche, N. Nedelko, A. Ślawska‐Waniewska,

Heavy Metal Exposure and Toxicity

It was reported the adsorption of As(III) on the surface of the chitosan-Fe-crosslinked complex. Theoretical correlation of the experimental equilibrium adsorption data for As(III)/Ch-Fe system is best explained by the non-linearized form Langmuir-Freundlich isotherm model. At optimum conditions, pH 9.0, the maximum adsorption capacity, calculated using the Langmuir-Freundlich isotherm model was 13.4 mg g⁻¹. The adsorption kinetics of As(III) onto Ch-Fe are described by the pseudo-first-order kinetic equation. The results of the Mössbauer spectroscopy showed that there is no redox process on the surface of the adsorbent.