title: Flocculation properties of polyacrylamide grafted carboxymethyl guar gum (CMG-g-PAM) synthesised by conventional and microwave assisted method.
abstract: A novel polymeric flocculant based on polyacrylamide grafted carboxymethyl guar gum (CMG-g-PAM) has been synthesised by grafting polyacrylamide chains onto CMG backbone using conventional redox grafting and microwave assisted grafting methods. Under optimum grafting conditions, 82% and 96% grafting efficiencies have been observed in case of conventional and microwave assisted methods respectively. The optimum sample has been characterized using viscometry, spectroscopic analysis, elemental analysis, molecular weight and radius of gyration determination. The flocculation characteristics of grafted and ungrafted polysaccharides have been evaluated in kaolin suspension, municipal sewage wastewater and decolourization efficiency of a dye solution (methylene blue). It is evident from results that CMG-g-PAM synthesised by microwave assisted grafting method is showing best flocculation characteristics.
authors.affiliation: Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826 004, India. sagarpal1@hotmail.com
authors.forename: Sagar
authors.initials: S
authors.lastname: Pal
authors.forename: S
authors.initials: S
authors.lastname: Ghorai
authors.forename: M K
authors.initials: MK
authors.lastname: Dash
authors.forename: S
authors.initials: S
authors.lastname: Ghosh
authors.forename: G
authors.initials: G
authors.lastname: Udayabhanu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D005427:Flocculation; D005685:Galactans / Q000737:chemistry*; D007616:Kaolin / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008351:Mannans / Q000737:chemistry*; D008872:Microwaves; D008970:Molecular Weight; D010084:Oxidation-Reduction; D053149:Plant Gums / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012722:Sewage; D012997:Solvents; D013053:Spectrophotometry / Q000379:methods; D014783:Viscosity; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D005685:Galactans; D007616:Kaolin; D008351:Mannans; D053149:Plant Gums; D011108:Polymers; D012722:Sewage; D012997:Solvents; D014874:Water Pollutants, Chemical; D000099166:Polyacrylamides; C469704:carboxymethyl guar gum