合成方沸石對Ni^2+、Mn^2+、Cr^3+、Sr^2+之吸附研究

A Study on Ni^2+、Mn^2+、Cr^3+、Sr^2+ Asorption by Synthesized Analcime

陳弘梅(H. M. Chen) ； 雷大同(D. T. Ray)

《鑛冶：中國鑛冶工程學會會刊》 55卷2期 (2011/06) Pp. 38-46

https://doi.org/10.30069/MM.201106.0004

摘要

本研究將向陽絹雲母分級所得＜2μm部分經水熱反應合成方沸石，再以合成之方沸石進行Ni^2+、Mn^2+、Cr^3+、Sr^2+之吸附實驗，探討方沸石對不同金屬離子之吸附行為。結果發現：（1）合成方沸石對各離子之吸附一般需24hr始達平衡；對低濃度（0.0001M）溶液，Cr^3+、Ni^2+、Mn^2+之吸附率幾乎100％，但Sr^2+僅30％，Sr^2+吸附率低應係其半徑較大；對高濃度（0.01M）溶液，Ni^2+、Mn^2+、Sr^2+之吸附率約為2％，Cr^3+為4％，Cr^3+吸附率高應係其價數較高。（2）合成方沸石對Ni^2+、Mn^2+、Cr^3+及Sr^2+離子之吸附符合Langmuir等溫吸附模式。（3）方沸石是以離子交換之機制及物理機制吸附溶液中離子。（4）方沸石吸附離子後之脫附行為顯示：價數高，半徑小之Cr^3+脫附為零，Ni^2+、Mn^2+、Sr^2+之脫附率隨半徑之增大而增加。

關鍵字

合成方沸石 ； 離子交換 ； 吸附 ； 脫附

並列摘要

The ＜2μm part of the commercial sericite powder was used in the synthesis of analcime via a hydrothermal processes. We conducted asorption experiments of Ni^2+, Mn^2+, Cr^3+ and Sr^2+ on the synthesized analcime. Results showed that: (1) 24 hrs are required for the asorption to reach equilibrium. For low concentration solutions (0.0001M), the asorption of Cr^3+, Ni^2+ and Mn^2+ are almost 100%; Sr^2+ is 30%. The low asorption of Sr^2+ is probably due to its large ionic radius. For high concentration solutions (0.01M), the asorption of Ni2+, Mn^2+ and Sr^2+ are 2%, Cr^3+ is 4%. The high asorption of Cr^3+ is probably due to its high valence. (2) The asorption behaviors of Ni^2+, Mn^2+, Cr^3+ and Sr^2+ conform to the Langmuir model. (3) The asorption of ions on analcime is through the mechanisms of ion exchange and physical adsorption. (4) The desorption behaviors of ions from analcime show that Cr3+ with high valence and small radius is zero, and for Ni^2+, Mn^2+ and Sr^2+, desorption increases with increasing radius.

並列關鍵字

synthesized analcime ； ion exchange ； adsorption ； desorption