Heavy metal (Cd2+, Ni2+, Pb2+ and Ni2+) adsorption in aqueous solutions by oxidized starches. (1st December 2014)

• Record Type: Journal Article
• Authors: Soto, Diana; Urdaneta, José; Pernía, Kelly; León, Orietta; Muñoz‐Bonilla, Alexandra; Fernández‐García, Marta
• Is Part Of: Polymers for advanced technologies. Volume 26:Number 2(2015:Feb.)
• Page Start: 147
• Page End: 152
• Publication Date: 2014-12-01
• Subjects: Polymers -- Periodicals; 668.9
• DOI: 10.1002/pat.3439
• Languages: English
• ISSNs: 1042-7147

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Superabsorbent materials based on natural products have been synthesized by free radical oxidation of corn starch using a redox system consisting of potassium permanganate and sodium bisulfite. The resulting oxidized starches were characterized by analyzing the variation of carbonyl and carboxyl contents. The swelling ability of these samples has been determined by gravimetric method in water and in saline solutions. The effect of oxidant concentration and bleaching procedure on the water absorption capacity has been studied. The ability to remove heavy metals in water solution has been tested against Cd²⁺, Ni²⁺, Pb²⁺ and Zn²⁺ ions, showing higher percentage of remotion for the unbleached oxidized starches, in particular against nickel ions. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>