Green synthesize of nano-MOF-ethylcellulose composite fibers for efficient adsorption of Congo red from water

Forough Aghaei; Shahram Tangestaninejad; Mehrnaz Bahadori; Majid Moghadam; Valiollah Mirkhani; Iraj Mohammadpoor Baltork; Mahla Khalaji; Vahideh Asadi

doi:10.1016/j.jcis.2023.05.170

Green synthesize of nano-MOF-ethylcellulose composite fibers for efficient adsorption of Congo red from water

J Colloid Interface Sci. 2023 Oct 15:648:78-89. doi: 10.1016/j.jcis.2023.05.170. Epub 2023 May 29.

Authors

Forough Aghaei¹, Shahram Tangestaninejad², Mehrnaz Bahadori¹, Majid Moghadam³, Valiollah Mirkhani⁴, Iraj Mohammadpoor Baltork¹, Mahla Khalaji¹, Vahideh Asadi¹

Affiliations

¹ Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran.
² Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran. Electronic address: stanges@sci.ui.ac.ir.
³ Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran. Electronic address: moghadamm@sci.ui.ac.ir.
⁴ Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran. Electronic address: mirkhani@sci.ui.ac.ir.

PMID: 37295372
DOI: 10.1016/j.jcis.2023.05.170

Abstract

Two novel MOF- ethyl cellulose (EC)- based nanocomposites have been designed and synthesized in water by electrospinning and applied for adsorption of congo red (CR) in water. Nano- Zeolitic Imidazolate Framework-67 (ZIF-67), and Materials of Institute Lavoisier (MIL-88A) were synthesized in aqueous solutions by a green method. To enhance the dye adsorption capacity and stability of MOFs, they have been incorporated into EC nanofiber to prepare composite adsorbents. The performance of both composites in the absorption of CR, a common pollutant in some industrial wastewaters, has then been investigated. Various parameters including initial dye concentration, the dosage of the adsorbent, pH, temperature and contact time were optimized. The results indicated 99.8 and 90.9% adsorption of CR by EC/ZIF-67 and EC/MIL-88A, respectively at pH = 7 and temperature at 25 °C after 50 min. Furthermore, the synthesized composites were separated conveniently and successfully reused five times without significant loss of their adsorption activity. For both composites, the adsorption behavior can be explained by pseudo-second-order kinetics, Intraparticular diffiusion and Elovich models demonstrated that the experimental data well matched to the pseudo-second-order kinetics. Intraparticular diffiusion model showed that the adsorption of CR on EC/ZIF-67 and EC/MIL-88a took place in one and two steps, respectively. Freundlich isotherm models and thermodynamic analysis indicated exothermic and spontaneous adsorption.

Keywords: Dye removal; Electrospinning; Ethylcellulose; Green method; Nano-MOF composite.