Competitive adsorption of Pb2+, Cu2+, and Cd2+ ions on microporous titanosilicate ETS-10.
Competitive adsorption of Pb2+, Cu2+, and Cd2+ ions on microporous titanosilicate ETS-10.
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DOI：
10.1016/j.jcis.2005.01.073
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发表时间：
2005-07
影响因子：
9.9
通讯作者：
L. Lv;M. Hor;F. Su;Xiu Song Zhao
中科院分区：
文献类型：
--
作者：
L. Lv;M. Hor;F. Su;Xiu Song Zhao
在本研究中，二元和三元重金属离子Pb 2+，Cu 2+，Cd 2+的微孔钛硅酸盐ETS-10的竞争吸附特性进行了研究，在间歇系统。以P25为钛源合成了纯微孔钛硅酸盐ETS-10，并通过X射线衍射（XRD）、场发射扫描电镜（FESEM）、氮气吸附、恒电位等技术对产物进行了表征。平衡和动力学吸附数据表明，在双组分或三组分体系中，ETS-10对一种金属表现出高选择性，亲和力顺序为Pb 2 +> Cd 2 +> Cu 2+。对ETS-10亲和力较强的重金属物种的平衡行为可以用Langmuir方程描述，而吸附动力学可以很好地拟合为拟二级动力学（PSO）模型。
In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Pb2+, Cu2+, and Cd2+on microporous titanosilicate ETS-10 were investigated in batch systems. Pure microporous titanosilicate ETS-10 was synthesized with P25 as the Ti source and characterized by the techniques of X-ray diffraction (XRD), field emission-scanning electron microscope (FESEM), nitrogen adsorption, and ζ-potential. Equilibrium and kinetic adsorption data showed that ETS-10 displays a high selectivity toward one metal in a two-component or a three-component system with an affinity order of Pb2+>Cd2+>Cu2+. The equilibrium behaviors of heavy metals species with stronger affinity toward ETS-10 can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order (PSO) model.