Radiation‐induced graft copolymerization of cellulosic fabric waste and its application in the removal of cyanide and dichromate from aqueous solution

Abstract

Graft polymerization and crosslinking in radiation processing are attractive techniques for modification of the chemical and physical properties of the conventional polymer. The graft polymerization and subsequent chemical treatment can introduce a chelate agent function into a conventional polymer such as cellulosic fabric. Cellulosic graft copolymers were prepared by the reaction of the fiber with acrylonitrile (AN) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) in DMF initiated by g-radiation 60 Co. The grafted fabric was chemically treated with hydroxyl amine to obtain amidoxime from. Factors affecting the grafting such as radiation dose, monomer concentration and solvent concentration as well as monomer composition was investigated. The chemically modified graft fabric was applied for recovery of cyanide and dichromate from aqueous solution. CN À shows 89% removal, whereas dichromate has 65% removal.

Removal of aqueous cyanide with strongly basic ion-exchange resin

“…[40] Microbial processes [7,41,42] and phytoremediation [3,[43][44][45] for CN − removal have achieved varying degrees of success. Natural and synthetic polymers and copolymers [46] and liquid membrane technology [47] reportedly worked well for CN − removal and recovery. However, most of the methods discussed so far are time consuming and/or need significant resource inputs which cannot be reused.…”

Characterization and Mechanical Properties of Cellulose-graft-Polyacrylonitrile Prepared by Using KMnO4/different Acids as Redox System

“…[8][9][10][11][12][13][14] Acrylonitrile (AN) is the most frequently tested monomer due to its highest efficiency 15,16) and possibility for further modification such as alkaline hydrolysis. 15,17) For example, the acrylonitrile grafted sample can be amidoximated to use in the metal ion adsorption [18][19][20][21] and expected to be used as antimicrobial materials. 22) Graft copolymerization reactions onto cotton cellulose with acrylonitrile have been studied using different initiation techniques, viz., manganese, sulphate initiation 23) , ozonization 24) , plasma radiation 25) , Co-60-γ-ray radiation 26) , and so on.…”