期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 192, 期 3, 页码 1580-1588出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.06.083
关键词
Carboxymethyl guar gum; Flocculation; Graft copolymer; Wastewater
资金
- University Grants Commissions, New Delhi, India [UGC - 36-59/2008]
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. (C) 2011 Elsevier B.V. All rights reserved.
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