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Synthesis of Novel Diketoacid Carragenans as Coordination Biopolymeric Chealting Agent Precursor by Oxidation of Kappa-Carrageenan Polysaccharide by Alkaline Permanganate

AASCIT Communications
Vol.3 , No. 1, Publication Date: Feb. 3, 2016, Page: 49-55

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Authors

[1]	Ahmed Fawzy, Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt.
[2]	Ishaq A. Zaafarany, Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al- Mukarramah, Saudi Arabia Kingdom.
[3]	Ismail I. Althagafi, Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al- Mukarramah, Saudi Arabia Kingdom.
[4]	Jabir H. Alfahemi, Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al- Mukarramah, Saudi Arabia Kingdom.
[5]	Hatem M. Altass, Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al- Mukarramah, Saudi Arabia Kingdom.
[6]	Khalid S. Khairou, Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah Al- Mukarramah, Saudi Arabia Kingdom.
[7]	Refat M. Hassan, Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt.

Abstract

Diketoacid derivative of kappa-carrageenan (KCAR) was synthesized as an oxidation product of oxidation of KCAR with potassium permanganate in alkaline solution at pH's > 12 with a yield of 96.2%. The chemical structure of the coordination biopolymer macromolecule (DKA-KCAR) has been elucidated by elemental analysis and IR spectroscopy. The product has a high efficiency for removal of toxic heavy metal cations from the contaminated matters in environment. Suggested models for chelation were presented. A tentative reaction mechanism consistent with the experimental results for oxidation is suggested.

Keywords

Synthesis, Coordination Biopolymers, Sulfated Polysaccharides, Permanganate, Oxidation, Mechanisms

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