Removal of metal ions using a new magnetic chitosan nano-bio-adsorbent; A powerful approach in water treatment

被引：230
作者：
Karimi, Fatemeh [1 ]
Ayati, Ali [1 ]
Tanhaei, Bahareh [1 ]
Sanati, Afsaneh L. [2 ]
Afshar, Safoora [1 ]
Kardan, Alireza [1 ]
Dabirifar, Zeynab [1 ]
Karaman, Ceren [3 ]
机构：
[1] Quchan Univ Technol, Dept Chem Engn & Energy, Quchan 9477177870, Iran
[2] Univ Coimbra, Dept Elect & Comp Engn, Inst Syst & Robot, Polo 2, P-3030290 Coimbra, Portugal
[3] Akdeniz Univ, Dept Elect & Energy, TR-07070 Antalya, Turkey
来源：
ENVIRONMENTAL RESEARCH | 2022年 / 203卷
关键词：
Removal; Magnetic adsorbent; Chitosan-base adsorbent; Metal ions; ADSORPTIVE REMOVAL; AQUEOUS-SOLUTION; KINETICS; NANOPARTICLES; CD(II); NI(II); EDTA; EQUILIBRIUM; PERFORMANCE; MECHANISM;
D O I：
10.1016/j.envres.2021.111753
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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.
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页数：8
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