摘要
以氯甲基化纤维、聚乙烯醇（ＰＶＡ）接枝甲基丙烯酸缩水甘油酯（ＧＭＡ）_一缩二乙二醇丙烯酸双酯（ＤＧＡ）纤维：氯球三种反应性基体，合成了含氮量分别为２．３４，２．９４，１．６１ｍｍｏｌ／ｇ的含正丙胺基吸附剂。结果表明：该类吸附剂在高酸度（ｐＨ＜１．５）及低酸度（ｐＨ＞３．５）对Ａｕ^（３＋）都有较高的吸附量，而在ｐＨ１．５～３．０的吸附量较小甚至为零；且该类吸附剂在低酸度（ｐＨ＞２．５）对Ａｕ^（３＋）有还原作用，随溶液离子强度升高，吸附剂对Ａｕ^（３＋）的吸附量下降。吸附动力学实验结果表明：含正丙胺基吸附剂在ｐＨ４．０对Ａｕ^（３＋）的吸附速度很慢，７２ｈ后仍未达到饱和吸附。在扫描电子显微镜下观察到吸附态金聚集成粒状。
Three kinds of adsorbents containing n-propylamine have been synthesized by amination of different reactive polymeric matrices, chloromethylated fiber, PVA fiber grafting glycidylmethacrylate- diglycolacrylic ester and chloromethylated resin, with n-propylamine in dioxane. Their N content is 2.34, 2.94, 1.61 mmol/g. The results of static adsorption experiments showed that adsorption amount of the adsorbents towards Au(3+) was great in high acidicity(pH<1.5)or in low one(pH>3.5),but small,even zero between pH1. 5 and pH3.0, and decreases with the increase of solution ionic strength; The adsorbents can reduce Au(3+) into Au0 in low acidicty(pH>2.5). The data of adsorption kinetics experiments showed that adsorption rate of the adsorbents towards Au￣(3+) was very slow at pH4.0, and it took more than 72h to reach their saturate adsorption amount. Grains of gold on the adsorbents were observed under scanning electron microscope.
出处
《合成纤维工业》
CSCD
1996年第4期36-40,共5页
China Synthetic Fiber Industry
基金
国家自然科学基金
国家教委博士点基金
关键词
丙胺基纤维
氧化还原
吸附
金离子
功能纤维
fiber containing n-propylamine
redox adsorption
gold
ion-exchange
