Exchange diffusion of Cu²⁺, Ni²⁺, Pb²⁺ and Zn²⁺ into analcime synthesized from perlite

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• 作者：Dyer ; Alan ; Tangkawanit ; Sudaporn ; Rangsriwatananon ; Kunwadee
• 关键词：Analcime ; Perlite ; Cation exchange ; Diffusion
• 刊名：Microporous and Mesoporous Materials
• 出版年：2004
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：November 2, 2004
• 卷：75
• 期：3
• 页码：273-279
• 文件大小：342 K

摘要

The zeolite analcime was synthesized, in its sodium form, from a perlite (volcanic glass) deposit at Lopburi, Thailand. Particle size analysis was used to approximate the radius of the analcime particles as 3.87脙脙10^脙脙脙6m. XRD, XRF, ²⁹Si MAS NMR and thermal analysis confirmed the product as analcime of good purity. Diffusion exchange of Cu²⁺, Ni²⁺, Pb²⁺ and Zn²⁺ for ²²Na⁺ from the synthetic analcime was investigated in the temperature range 298脙脙脙333K. Diffusion coefficients (D) were calculated using the Barrer, Barri and Klinowski equation. E_a, 脙脙S* and 脙脙G* values showed that all the channel sites were involved in the observed diffusion processes.