Volume 69, Issue 7 pp. 1051-1059
ARTICLE

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb2+ and Cd2+ ions

Saade Abdalkareem Jasim

Saade Abdalkareem Jasim

Medical Laboratory Techniques Department, Al-Maarif University College, Ramadi, Iraq

Search for more papers by this author
Kadda Hachem

Corresponding Author

Kadda Hachem

Laboratory of Biotoxicology, Pharmacognosy and Biological Valorization of Plants (LBPVBP), Faculty of Sciences, University of Saida, Saïda, Algeria

Correspondence

Kadda Hachem, Laboratory of Biotoxicology, Pharmacognosy and Biological Valorization of Plants (LBPVBP), Faculty of Sciences, University of Saida, Dr Moulay Tahar, 20000 Saïda, Algeria.

Email: [email protected]

Aliakbar Dehno Khalaji, Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran.

Email: [email protected]

Search for more papers by this author
Shaymaa Abed Hussein

Shaymaa Abed Hussein

Al-Manara College for Medical Sciences, Amarah, Iraq

Search for more papers by this author
Abduladheem Turki Jalil

Abduladheem Turki Jalil

Medical Laboratories Techniques Department, Al-Mustaqbal University College, Hilla, Iraq

Search for more papers by this author
Noora M. Hameed

Noora M. Hameed

Anesthesia Techniques, Al–Nisour University College, Baghdad, Iraq

Search for more papers by this author
Aliakbar Dehno Khalaji

Corresponding Author

Aliakbar Dehno Khalaji

Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran

Correspondence

Kadda Hachem, Laboratory of Biotoxicology, Pharmacognosy and Biological Valorization of Plants (LBPVBP), Faculty of Sciences, University of Saida, Dr Moulay Tahar, 20000 Saïda, Algeria.

Email: [email protected]

Aliakbar Dehno Khalaji, Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran.

Email: [email protected]

Search for more papers by this author
First published: 22 June 2022
Citations: 11

Abstract

In this study, modified chitosan with epichlohydrin and bidentate Schiff base ligand (CEP) was successfully synthesized and characterized using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray powderdiffraction (XRD), and scanning electron microscopy (SEM). In addition, its removal ability of Pb2+ and Cd2+ ions was studied and the effect of various parameters such as pH solution, sorbent dose, and contact time on the adsorption of Pb2+ and Cd2+ ions were investigated and optimized. At optimal conditions (pH of 5, contact time of 90 min, 40 ppm of Pb2+, Cd2+ concentration, and 0.02 g of CEP), the maximum removal percentage of Pb2+ and Cd2+ ions was found to be 95 and 79%, respectively. The adsorption process followed the second-order kinetic model for Pb(II) and the first-order kinetic model for Cd(II). In addition, the effect of interface ions was investigated and it was found that the presence of divalent cations only affected the adsorption of Pb(II) and Cd(II) using CEP. Finally, the CEP adsorbent has undergone five regeneration experiments and adsorption efficiency was reduced by about 9 and 12% for Pb(II) and Cd(II) ions, respectively. Results show that the CEP has great potential for the removal of other heavy metal ions as a facile, eco-friendly, and low-cost adsorbent.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.