摘要
本文研究天然麦饭石固体与海、淡水中锌进行离子交换时，百分交换量随ｐＨ的变化，及一定温度、ｐＨ值下的固液分配等温线。结果表明，淡水中等温线在广泛浓度范围符合Ｌａｎｇｍｕｉｒ方程和Ｆｒｅｕｎｄｌｉｃｈ方程；海水中锌在麦饭石上固液分配等温线可用“三常数”吸着方程描述。百分交换率随ｐＨ值的变化曲线呈“Ｓ”型，此外测定了麦饭石对海、淡水中锌的饱和交换量，并对锌在麦饭石上的作用机理进行了探讨。
The paper introduces the varieties of exchange ratio(%)with pH whilebeing ion-exchanging of zinc on Mai Fan Stone in seawater and freshwater,and the liquid-solid partitioning isotherms in certain temperature and pH.As the results,the isotherms in freshwater correspond with Langmuir Formulaand Freundlich Formula,and those in seawater can be described by 3 Cons-tants adsoptive formula. The curve of exchange ratio(%)with pH is in“S”shape. In addition,the saturated exchange density of zinc on Mai FanStone in seawater and freshwater has been examined,and the exchangemechanism iS also disscused.
关键词
锌
麦饭石
离子交换
zinc,Mai Fan Stone,ion-exchange
