| Literature DB >> 34331923 |
Fatemeh Karimi1, Ali Ayati2, Bahareh Tanhaei3, Afsaneh L Sanati4, Safoora Afshar2, Alireza Kardan2, Zeynab Dabirifar2, Ceren Karaman5.
Abstract
In this study, a magnetic chitosan/Al2O3/Fe3O4 (M-Cs) nanocomposite was developed by ethylenediaminetetraacetic acid (EDTA) functionalization to enhance its adsorption behavior for the removal of Cd(II), Cu(II) and Zn(II) metal ions from aqueous solution. The results revealed that the EDTA functionalization of M-Cs increased its adsorption capacity ~9.1, ~5.6 and ~14.3 times toward Cu, Cd and Zn ions. The maximum adsorption capacity followed the order of Cd(II) > Cu(II) > Zn(II) and the maximum adsorption efficiency was achieved at pH of 5.3 with the removal percentage of 99.98, 93.69 and 83.81 %, respectively, for the removal of Cu, Cd and Zn ions. The metal ions adsorption kinetic obeyed pseudo-second-order equation and the Langmuir isothermal was found the most fitted model for their adsorption isothermal experimental data. In addition, the thermodynamic study illustrated that the adsorption process was exothermic and spontaneous in nature.Entities:
Keywords: Chitosan-base adsorbent; Magnetic adsorbent; Metal ions; Removal
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Year: 2021 PMID： 34331923 DOI： 10.1016/j.envres.2021.111753
Source DB: PubMed Journal: Environ Res ISSN： 0013-9351 Impact factor: 6.498