摘要
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).
出处
《云南环境科学》
1997年第3期59-61,64,共4页
Yunnan Environmental Science
基金
有色金属工业总公司资助
关键词
化学气相沉积法
13X分子筛
吸附
重金属离子
Chemical Vapor deposition method 13X molecurlar sieve pore diameter heavy metal ion