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
Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI
În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.
Autori: OUISSAM BIBA, SAMIRA MESKI, HAFIT KHIRDDINE.
DOI: 10.24193/subbchem.2022.2.03
Published Online: 2022-06-30
Published Print: 2022-06-30
pp. 45-66
VIEW PDF
FULL PDF
The modified natural phosphate of djebel onk was investigated for the removal of cationic textile dye Methylene blue (MB) from aqueous solution. The modified natural phosphate rock powder (MNP) was characterized by means of XRD, IR spectroscopic and thermal analysis. Adsorption studies were carried out under various parameters such as pH, contact time, initial dye concentration and temperature. The equilibrium data were analyzed using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models, the results of modeling adsorption of Methylene blue (MB) on modified natural phosphate rock (MNP) show that the Langmuir model presents a good coefficient of correlation compared to other models. The kinetics of adsorption were best described by pseudo-second order and the thermodynamic parameters (ΔH°, ΔS° and ΔG°) of the adsorption were also evaluated. The adsorption process was found not-spontaneous and exothermic.
Keywords: Algerian phosphate, adsorption, methylene blue, isotherme
