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