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测定海水或矿泉水中的微量重金属时,通常需预先应用共沉淀、液-液萃取、离子交换、蒸馏、共结晶,还原气化等分离、富集手段作前处理。然而这类方法或是操作烦琐冗长,或是回收效率不高。其中离子交换法虽需时较长,但操作简单,近年来为进一步改善树脂吸着性能,不断提出应用各种螯合树脂于此目的的报告,效果甚佳。螯合树脂系高分子母体中引入各种特征螯合基团作离子交换活性基团的一类吸着剂。现已报告用于吸着海水、工业污水等水样中微量铀的螯合树脂有多种,我们选择合成了含有如下活性基团的螯合树脂:
Determination of trace amounts of heavy metals in seawater or mineral water, usually pre-coprecipitation, liquid-liquid extraction, ion exchange, distillation, co-crystallization, reduction and gasification separation, enrichment means for pretreatment. However, such methods are either cumbersome and cumbersome to operate or inefficient. Ion exchange method which takes longer, but the operation is simple, in recent years to further improve the resin sorption performance, continue to propose the use of various chelating resin for this purpose, the report, the effect is very good. A series of sorbents with various characteristic chelating groups as ion-exchange active groups are introduced into the chelate resin-based polymer matrix. A variety of chelating resins have been reported for the adsorption of trace amounts of uranium in water samples such as seawater and industrial wastewaters. We have opted for the synthesis of chelating resins containing the following reactive groups: