中文摘要：

本研究通过工业蛭石在水溶液中对Cu^2＋、Pb^2＋、Zn^2＋的等温吸附实验,分析了蛭石对三种金属离子的吸附性能和机理;探讨了浓度对蛭石吸附量和吸附率的影响以及吸附等温方程的类型。实验结果表明,蛭石对三种金属离子具有很高的吸附容量;在低浓度时,三种离子在蛭石上的吸附机理主要以离子交换为主,且吸附量大小次序为Pb^2＋〉Cu^2＋〉Zn^2＋,吸附等温方程既符合Langmuir型,也符合Freundlich型;在高浓度时,离子交换和物理吸附同时发生,且吸附量大小次序为Zn^2＋〉Pb^2＋〉Cu^2＋,蛭石对Cu^2＋和Pb^2＋的吸附基本符合Langmuir型和Freundlich型,而蛭石对Zn^2＋的吸附,既不符合Langmuir型,也不符合Freundlich型。

英文摘要：

The research focus on the isothermal adsorption of Cu^2＋ , Pb^2＋ and Zn^2＋ on vermiculite in aqueous solution. Analyzing the adsorbent capacity of vermiculite for three kinds of metal cations and the influence of metal concentration for adsorbent capacity and velocity, and the type of adsorption isotherm equation were also discussed. The results showed that the adsorbent capacity of vermiculite for those cations is high; On light concentration condition, the adsorbent mechanism of those cations on vermiculite is ion exchange and adsorbent capacity followed Pb^2＋〉Cu^2＋〉Zn^2＋ , and adsorption isotherm equation not only accord with Langmuir type, but also cohere with Freundlich type; But on high concentration condition, ion exchange and physical adsorption are concomitance and adsorbent capacity followed Zn^2＋〉 Pb^2＋〉 Cu^2＋ , and the type of adsorption isotherm equation of Cu^2＋ and Pb^2＋ to meet Langmuir type and Freundlich type simultaneity, but Zn^2＋ neither Langmuir type nor Freundlich type.