Ion-Exchange Selectivity of Anion Exchange Resin Modified with Polystyrenesulfonic Acid
Ion-Exchange Selectivity of Anion Exchange Resin Modified with Polystyrenesulfonic Acid
复制标题
聚苯乙烯磺酸改性阴离子交换树脂的离子交换选择性
DOI：
10.2116/analsci.20.1099
复制
发表时间：
2004
影响因子：
1.6
通讯作者：
K. Matsusaki
中科院分区：
文献类型：
--
作者：
N. Endo;Rei Ikuta;Mitsuru Higa;K. Matsusaki
为了改变阴离子交换树脂的离子交换选择性，用阴离子表面活性剂聚苯乙烯磺酸对凝胶型阴离子交换树脂进行表面改性。改性后的树脂对硝酸根离子的交换率降低不大，但对硫酸根离子的交换率有明显的降低。据认为，多价阴离子的离子交换反应受到对改性层的静电排斥力大于对单价阴离子的静电排斥力的抑制。因此，这种改性树脂可适用于一价阴离子的选择性分离。考察了改性条件对离子交换速率的影响。此外，该改性树脂用于分离水溶液中的硝酸根离子和硫酸根离子。
In order to change the ion-exchange selectivity of anion-exchange resin, the surface of a gel-type anion exchange resin was modified with anionic polyelectrolyte, polystyrenesulfonic acid. Using this modified resin, the ion-exchange rate of nitrate was little decreased, but that of sulfate was evidently decreased. It is considered that the ion-exchange reaction of the multivalent anion is suppressed by the greater electrostatic repulsive force against the modification layer than that against the monovalent anion. Thus, this modified resin may be suitable for the selective separation of monovalent anions. The influence of the modified condition on the ion-exchange rate was examined. Furthermore, this modified resin was used to separate nitrate ions from sulfate ions in the aqueous solution.