Azur C Dye Removal using GO/P(CMC-Co-Am) Nanocomposite: Adsorption and Kinetic Studies
نویسندگان
1 Department of Pharmaceutical Chemistry, College of Pharmacy, University of Al-Qadisiyah, Al Diwaniyah, Iraq
2 Department of Chemistry, University of Sahiwal, Sahiwal, Pakistan
3 Department of Chemistry, College of Education, University of Al-Qadisiyah, Diwaniyah, Iraq
doi
10.22052/JNS.2024.04.022چکیده
Current research deals with removing Azure C dye from aqueous solutions via adsorption on graphene oxide-carboxymethyl cellulose-co-acrylamide (GO/P(CMC-Co-Am)) nanocomposite. The nanocomposite studied here was synthesized via free radical copolymerization and further characterized by Fourier Transform infrared (FTIR), X-ray diffraction (XRD) and Field Emission electron microscopy (FESEM). For exploring the adsorption efficiency of prepared nanocomposite, batch adsorption experiments were conducted that explains the effect of pH, contact time, adsorbent dose, and salt concentration on Azure C dye adsorption. Kinetic study revealed the fitness of pseudo-second kinetic model suggesting a chemical adsorption mechanism. An optimal adsorption time of 120 minutes was observed, yielding an adsorption capacity of 9.14 mg/g. The point of zero charge of nanocomposite was observed to be pH 5. Increasing the adsorbent dose initially enhanced adsorption but eventually led to a decline due to aggregation and competition for adsorption sites. The presence of salts, particularly CaCl2, positively influenced adsorption via salting-out effect.
