Removal of methyl orange from aqueous solution onto modified extracted cellulose from Stipa Tenacissima L

• Published in: International journal of environmental analytical chemistry Vol. 102; no. 19; pp. 8124 - 8140
• Main Authors: Lafi, Ridha, Abdellaoui, Lotfi, Montasser, Imed, Hafiane, Amor
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 30.12.2022; Taylor & Francis LLC
• Subjects: Adsorption; Ammonium; Ammonium bromides; Ammonium compounds; Aqueous solutions; Bromides; Cellulose; Dyes; Electrostatic properties; Hydrophobicity; Ionic strength; kinetics; mechanism; Methyl orange; modified extracted cellulose; pH effects; Removal; Stipa Tenacissima L
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067319.2020.1845663

This study investigated the sorption behaviour of modified extracted cellulose (MEC) from Stipa Tenacissima L by cetyltrimethyl ammonium bromide to improve adsorption capacity for the removal of methyl orange (MO) dye from aqueous solutions. Physico-chemical characterisation of extracted material was performed by pH PZC determination, SEM, DSC, XDR and FTIR. The pH PZC occurred around a pH of 4.2. The effect of pH, contact time, MO concentration, adsorbent dosage, ionic strength and temperature on adsorption was presented. The results showed that it was in favour of adsorption at pH = 3.7 with 0.2 g/50 mL. Modelling study shows that the pseudo-second-order kinetic model and Langmuir adsorption isotherm model provide better fitness to the experimental data and the maximum adsorption capacity was 16.94 mg/g at 25°C. Calculated thermodynamic parameters ∆G 0 , ∆H 0 and ∆S 0 showed that adsorption is spontaneous and exothermic, and the possible mechanism controlling MO adsorption on the MEC is related to electrostatic and hydrophobic interactions.