Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826 004, India.
J Hazard Mater. 2011 Sep 15;192(3):1580-8. doi: 10.1016/j.jhazmat.2011.06.083. Epub 2011 Jul 2.
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.
一种新型的基于聚丙烯酰胺接枝羧甲基瓜尔胶（CMG-g-PAM）的聚合物絮凝剂已经通过使用传统的氧化还原接枝和微波辅助接枝方法将聚丙烯酰胺链接枝到 CMG 主链上合成。在最佳接枝条件下，分别观察到传统方法和微波辅助方法的接枝效率为 82%和 96%。对最佳样品进行了粘度、光谱分析、元素分析、分子量和回转半径的测定。接枝和未接枝多糖的絮凝特性在高岭土悬浮液、城市污水和染料溶液（亚甲基蓝）的脱色效率中进行了评价。结果表明，通过微波辅助接枝法合成的 CMG-g-PAM 表现出最好的絮凝特性。
