Zeolites are crystalline, hydrated aluminosilicate minerals that are characterized by their
ability to exchange some of their constituent cations with cations in aqueous solutions,
without a major change in their crystalline structure. Clinoptilolite is the most abundant ype of zeolite and it has received extensive attention due to its favorable selectivity for mmonium and certain heavy metal cations.
The aim of this study is to investigate the binary and ternary (multicomponent) ion xchange behavior of sodium form of Gö / rdes type clinoptilolite for ammonium,cadmium and sodium ions.
For this purpose, NH4
+-Na+,Cd2+-Na+ binary systems and NH4
+-Cd2+-Na+
multicomponent system were investigated both in batch and column systems at 0.1 and
0.01 constant total normality respectively and at 250C constant temperature. As a result
of binary and ternary experiments, clinoptilolite&rsquo / s affinity for both ions but greater
affinity to NH4+ ion than Cd2+ ion was observed and the selectivity sequence of Gö / rdes clinoptilolite was determined as NH4+> / Cd2+> / Na+ in binary and multicomponent batch
and column operations.
Additionally, total ion exchange capacities and maximum exchange levels of Gö / rdes
clinoptilolite for both ions were determined in batch systems whereas breakthrough
capacities and column efficiencies (for three different flow rates) were determined in column systems. Finally, it was concluded that the increase of the flow rate reduced the
breakthrough capacities and column efficiencies of Gö / rdes clinoptilolite for ammonium and cadmium ions in multicomponent column systems involving more than one cation.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12607580/index.pdf |
| Date | 01 September 2006 |
| Creators | Bayraktaroglu, Kerem |
| Contributors | Yucel, Hayrettin |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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