Synthesis and sorption properties of zeolite ZSM-5
Zeolite ZSM-S was synthesised by using SDS or the mixture of TPA/SDS as a templating agent. There is no significant difference in the X-Ray Diffraction (XRD) pattern observed among zeolites synthesised using different templating agents. This indicated that zeolites of similar crystallinity were f...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2000
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9087/1/FSAS_2000_19_A.pdf |
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| Summary: | Zeolite ZSM-S was synthesised by using SDS or the mixture of TPA/SDS as
a templating agent. There is no significant difference in the X-Ray Diffraction
(XRD) pattern observed among zeolites synthesised using different templating
agents. This indicated that zeolites of similar crystallinity were formed. However.
slightly different surface area, porosity and morphology of the zeolites were
observed, when different ratio of TPA/SDS were used as a templating agents.
Zeolites A, X and ZSM-5 were found to be an effective ion exchanger for lanthanum
and yttrium ions from aqueous solutions. High metal ion uptake was achieved at
initial pH solution of 4.0-4.5 with different conditions to avoid chemical
precipitation. The microwave-assisted method showed that it could accelerate the
metal sorption process by about 500 times compared to the conventional method.
The zeolites loaded with lanthanum and yttrium ions significantly improved the
sorption capacity of zeolite towards arsenic ions. Experimental conditions such as pH, initial concentrations, adsorbent dosage and temperature have been optimised to
utilise zeolite as an adsorbent for the removal of arsenate ion from aqueous solution.
An data fitted the Langmuir and Freundlich isotherms. The zeolites were found to
be an ineffective color removal agent for natural peat water and humic acid. |
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