中文摘要：

以人工合成的13X型分子筛为吸附荆，研究了水中Pb^2＋、Cd^2＋和Cu^2＋在分子筛上的吸附行为，讨论了Pb^2＋、Cd^2＋和Cu^2＋共存条件下的竞争吸附，并考察了水中存在的Na^＋、Mg^2＋、Ca2＋等离子对分子筛吸附去除重金属的影响．实验结果表明，13X分子筛对Pb^2＋、Ca2＋和Cu^2＋3种离子的吸附符合Langmuir模型，最大吸附量分别为2．47mmol／L、2．Ommol／L和1．78mmol／L．在竞争吸附条件下，13X分子筛对3种重金属离子的选择性依次为Pb^2＋〉Cd^2＋〉Cu^2＋．水中存在的Na^＋．Mg^2＋、Ca2＋等对分子筛吸附重金属效率有一定的影响，其中Ca2＋对Cu^2＋在分子筛上的去除影响最为显著。

英文摘要：

In this study, the adsorption and competitive adsorption of Pb^2＋, Cd^2＋ and Cu^2＋onto 13X zeolite was studied. The influence of aqueous Na^＋, Mg^2＋ and Ca^2＋ cations on the removal efficiency of the heavy metals was also investigated. The results showed that the adsorption of the heavy metals onto the zeolite was well described by Langmuir adsorption model and the maximum adsorption amounts of Pb^2＋, Cd^2＋and Cu^2＋ onto 13X zeolite were found to be 2.47mmoI/L, 2.0mmol/L, 1.78mmol/L, respectively. The competitive adsorption results revealed that the adsorption selectivity of the zeolite for the metal cations decreased as pb^2＋〉Cd^2＋〉Cu^2＋. The removal efficiencies of the metal cations were related to other ions. In particular, the presence of Ca^2＋ led to a markedly decreased adsorption capacity of the zeolite for Cu^2＋.