羧基淀粉接枝聚合物对重金属离子的吸附等温方程

Sorption Isothermal Equation of Carboxyl-Containing Starch Graft Polymer for Some Heavy Metal Ions

通过化学反应过程将丙烯腈接枝到高交联淀粉上,接枝产物再经皂化水解制得不溶性羧基淀粉接枝聚合物(简称羧基淀粉).研究了羧基淀粉吸附重金属离子的容量,结果表明,吸附量随吸附平衡浓度的变化规律,遵从Q/Qmax=ac/(1+ac)方程.

Water-insoluble carboxyl-containing starch graft polymer （carboxyl-containing starch） was prepared by grafting acrylonitrile onto highly cross-linked starch, followed by base saponification to convert nitrile group into a mixture of carboxamide and carboxylate groups. The sorption amount properties of carboxyl-containing starch for several heavy metal ions have also been studied systematically. It is shown that the relationship between the sorption amount and equilibrium concentration complies completely with the following sorption isothermal equation Q/Qmax = ac/（1 ＋ ac） .