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以焦磷钼酸锡为基体制备了一种脱铅离子筛，可以高选择性脱除水体中的痕量铅离子．通过对离子筛的原位红外光谱，Ｘ射线光电子能谱及选择性吸附实验的分析，探索了脱铅离子筛界面的选择性筛分机理．研究表明在制备离子筛的热力学重结晶过程中，基体发生了固相化学反应，通过化学修饰手段，可在其表面形成具有特殊选择性的吸附筛位，当Ｐｂ２＋被置换后，由于基体聚合反应的发生，使吸附位的微观结构未被破坏，而是以铅空穴的形式保存在与Ｐｂ２＋有独特键合作用的界面上的和基团中，进而形成对铅离子的特殊选择性．这种吸附位的筛分作用为一种弱化学作用，与待去离子的价电子态直接相关．
A kind of lead-removing ion sieve was prepared by using tin pyrophosphoric acid as matrix, which can remove trace lead ions in water with high selectivity. By means of in-situ FT-IR, X-ray photoelectron spectroscopy and selective adsorption experiments, the selective screening mechanism of the lead-free ion sieve interface was explored. The results show that during the process of thermodynamic recrystallization, the substrate undergoes a solid-phase chemical reaction, and a selective selective adsorption screen can be formed on the surface of the ion sieve by chemical modification. When Pb2 + is replaced, , The microstructure of adsorption sites was not destroyed. Instead, the microstructure of adsorption sites was preserved in the form of lead holes in the and groups at the interface with unique bonding with Pb2 +, thus forming a special selectivity to lead ions. The screening effect of this adsorption site is a weak chemical effect that is directly related to the valence state of the ions to be deionized.