接枝淀粉絮凝剂对Pb^(2+) 、Cd^(2+) 吸附性能研究

Study on the adsorption of Pb^(2+) and Cd^(2+) by graft starch flocculant

为探究淀粉絮凝剂对Pb^(2+)、Cd^(2+)的吸附性能,以过氧化氢、盐酸羟胺为引发剂,玉米淀粉、丙烯酰胺为原料合成接枝淀粉絮凝剂。利用红外光谱仪对产物进行结构表征,并考察絮凝剂加入量、絮凝时间及pH值对Pb^(2+)、Cd^(2+)吸附性能的影响。结果显示:絮凝剂有反应物的特征吸收峰,在絮凝剂加入量为0.5 g、pH值为7.0、Pb^(2+)和Cd^(2+)絮凝时间分别为40 min和30 min时,Pb^(2+)和Cd^(2+)的去除率分别为84.7%和80.7%。

To study the adsorption of Pb^(2+)and Cd^(2+),the flocculant of starch-graft-acrylamide was synthesized with corn starch,with acrylamide as raw materials and hydrogen peroxide,and hydroxylamine hydrochloride as initiator.The structure of the product was characterized by Fourier-transform infrared spectroscopy.The effect of dosage,flocculation time and pH on the adsorption capacity of Pb^(2+)and Cd^(2+)on graft starch flocculant was explored.The result shows that flocculant reserved obvious characteristic absorption peaks.When the dosage was 0.5 g,pH value was 7.0 and flocculation time of Pb^(2+)and Cd^(2+)were 40 min and 30 min,the removal of Pb^(2+)and Cd^(2+)were 84.7%and 80.7%,respectively.