Chitosan Functionalized with Carboxyl Groups as a Recyclable Biomaterial for the Adsorption of Cu (II) and Zn (II) Ions in Aqueous Media

International Journal of Molecular Sciences

卷:23

Jamelah S. Al-Otaibi¹  M. I. Sayyed²  Elena G. Kovaleva³  Asmaa M. Abu El-Soad³  Giuseppe Cavallaro⁴  Giuseppe Lazzara⁴  Mahmoud O. Abd El-Magied⁵ 

[1] Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia;

[2] Department of Physics, Faculty of Science, Isra University, Amman 11622, Jordan;

[3] Department of Technology of Organic Synthesis, Institute of Chemical Technology, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia;

[4] Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, Parco d’Orleans II, Ed. 17, 90128 Palermo, Italy;

[5] Nuclear Materials Authority, El Maadi, Cairo 11381, Egypt;

关键词: biomaterials;    adsorption;    thermodynamic studies;   

DOI  :  10.3390/ijms23042396

来源: DOAJ

【 摘 要 】

The modification of chitosan represents a challenging task in obtaining biopolymeric materials with enhanced removal capacity for heavy metals. In the present work, the adsorption characteristics of chitosan modified with carboxyl groups (CTS-CAA) towards copper (II) and zinc (II) ions have been tested. The efficacy of the synthesis of CTS-CAA has been evaluated by studying various properties of the modified chitosan. Specifically, the functionalized chitosan has been characterized by using several techniques, including thermal analyses (differential scanning calorimetry and thermogravimetry), spectroscopies (FT-IR, XRD), elemental analysis, and scanning electron microscopy. The kinetics and the adsorption isotherms of CTS-CAA towards both Cu (II) and Zn (II) have been determined in the aqueous solvent under variable pH. The obtained results have been analyzed by using different adsorption models. In addition, the experiments have been conducted at variable temperatures to explore the thermodynamics of the adsorption process. The regeneration of CTS-CAA has been investigated by studying the desorption process using different eluents. This paper reports an efficient protocol to synthesize chitosan-based material perspective as regenerative adsorbents for heavy metals.

【 授权许可】

Unknown