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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Autori: DRAGAN DJORDJEVIC, MARIJA KODRIC, RADICA KRSTIC, SUZANA DJORDJEVIC.
DOI: 10.24193/subbchem.2022.1.06
Published Online: 2021-03-15
Published Print: 2021-03-30
pp. 89-106
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The synthesis of a new sorbent based on waste cotton cellulose and kinetics of adsorption of reactive textile dye from aqueous solution are the subject of the study in this manuscript. The sorbent is made of waste cotton fibers collected from the textile plants for spinning yarn and weaving fabrics after being physically and chemically modified. Qualitative and quantitative characterization of the sorbent shows that carbon is dominant in the chemical composition. The sorbent used is a relatively finely divided material with heterogeneous porous particles, generally below 300 µm in size. Maximum adsorption capacity and the rate constant of the pseudo-second order generally depend on the amount of the cellulose-based sorbent, the initial dye concentration and the temperature. A new kinetic model based on the results of adsorption capacity and pseudo second order rate constant was defined. The low value of the activation energy means that the adsorption is mostly of a physical nature. Thermodynamic parameters, change of free Gibb''s energy, change of enthalpy and change of entropy, as well as activation energy according to the standard equation confirm the adequacy of the new kinetic model of dye adsorption.
Keywords: adsorption, reactive dye, pseudo-second order, cellulose-based sorbent, new kinetic model, thermodynamic parameters.
