Carboxymethyl cellulose-hydrogel embedded with modified magnetite nanoparticles and porous carbon: effective environmental adsorbent

0524620 - ÚMCH 2021 RIV GB eng J - Článek v odborném periodiku
Kamel, S. - El-Gendy, A. A. - Hassan, M. A. - El-Sakhawy, M. - Kelnar, Ivan
Carboxymethyl cellulose-hydrogel embedded with modified magnetite nanoparticles and porous carbon: effective environmental adsorbent.
Carbohydrate Polymers. Roč. 242, 15 August (2020), s. 1-11, č. článku 116402. ISSN 0144-8617. E-ISSN 1879-1344
Grant CEP: GA ČR(CZ) GA19-06065S
Institucionální podpora: RVO:61389013
Klíčová slova: magnetite carboxymethyl cellulose * porous carbon * hydrogel
Obor OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impakt faktor: 9.381, rok: 2020
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0144861720305762?via%3Dihub

Adsorption is the most efficient technique for the removal of metal ions and organic dyes from water. This stimulates demand for the preparation of eco-friendly adsorbents. In this study, magnetic hydrogels based on a crosslinked carboxymethyl cellulose grafted acrylamide (CMC-g-AM) embedded with porous carbon (PC) and citric acid-modified magnetite were prepared. PC was synthesized via single-step oxidation of bagasse under muffled atmosphere condition. The magnetite (Fe3O4) nanoparticles were synthesized using the co-precipitation method (Fe2+/Fe3+) and citric acid modification (CFe). Functionality and parameters of adsorbent were characterized by infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray. The magnetic hydrogels have a highly effective performance for Pb-ions and methylene blue dye (MB) removal from water due to the unique role of crosslinked CMC matrix in supporting synergy between embedded PC and CFe. Adsorption testing using time intervals (5–120 min) and Pb-ions and MB concentrations (5–500 mg/L) indicate that CMC-g-AM containing equal content of PC and CFe has substantially higher removal efficiency, 70.8 and 96.1 % against 47.8 and 30.2 % (without PC and CFe) for Pb-ions and MB adsorption respectively for CMC-g-AM. The equilibrium time and the maximum sorption capacity (qm) from the adsorption studies were found to be 60 and 30 min and 294.1 and 222.2 mg/g for Pb-ions and MB respectively. The kinetics and isotherms were studied to highlight the adsorption rate and mechanism of the adsorption process.
Trvalý link: http://hdl.handle.net/11104/0308957