化学气相沉积法对13X分子筛孔径修饰及吸附性能研究

Modification of Pore Diameter and Adsorption Properties of 13X Molecular Sieve Treated by Chemical Vapor Deposition Method

化学气相沉积法（ｃｈｅｍｉｃａｌｖａｐｏｒｄｅｐｏｓｉｔｉｏｎｍｅｔｈｏｄ简称ＣＶＤ法）可对１３Ｘ分子筛进行孔径修饰，并用于含重金属离子废水的净化处理。研究结果表明，随１３Ｘ分子筛外表面ＳｉＯ２沉积量的增加，孔径收缩。用经ＣＶＤ法处理的１３Ｘ分子筛净化含重金属离子水溶液时，发现吸附Ｃｕ（Ⅱ）、Ｃｄ（Ⅱ）的能力提高，吸附Ｃｒ（Ⅵ）的能力降低；在Ｃｕ（Ⅱ）—Ｃｄ（Ⅱ）—Ｃｒ（Ⅵ）混合溶液中，可优先吸附Ｃｕ（Ⅱ）、Ｃｄ（Ⅱ）离子。

X molecular sieve moclified by chemical vapor deposition method has been ased fo purifing heavy metals.The results indicated that the pore diameter of 13X molecalar sieve dicrease with increasing SiO 2 depositing on surface.It was found that the adsorption of Cu(Ⅱ)、Cd(Ⅱ) increase,Cr(Ⅵ) decrease after byCVD,and have treated 13X molecular sieve can adsorb Cu(Ⅱ),Cd(Ⅱ) preferentially in the mixture solution of Cu(Ⅱ)-Cd(Ⅱ)-Cr(Ⅵ).