AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Issue no. 3, Tom I / 2016 | |||||||
Article: |
ADSORPTION, ECHILIBRIUM AND KINETIC STUDY OF MALACHITE GREEN REMOVAL FROM AQUEOUS SOLUTIONS USING FIR (ABIES NORDMANNIANA) CONES BIOMASS. Authors: ANA-MARIA SĂCARĂ, CERASELLA INDOLEAN, LIANA MARIA MUREȘAN. |
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Abstract: Adsorption of Malachite Green (MG) dye on a biomass prepared from fir (Abies nordmanniana) cones, followed by UV–Vis detection has been studied. The biomass was characterized using scanning electron microscopy (SEM). The maximum adsorption capacity of MG onto fir cones biomass was determined to be 2.197 mg/g. The influence of pH on the removal of the MG dye was investigated and the results showed that the best adsorption capacity were obtained in the most acidic environment (pH=2). The adsorption rates were evaluated by fitting the experimental data to conventional kinetic models such as pseudo- first- and pseudo-second-order models. From the Dubinin–Radushkevich isotherm model, a 5.95 kJ/mol value for the mean free energy was calculated, indicating that MG adsorption could include an important physisorption stage. Keywords: adsorption, cones biomass, Abies nordmanniana, kinetics, dyes, malachite green
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