Pure, single phase, high crystalline, chamfered-edge zeolite 4A synthesized from coal fly ash for use as a builder in detergents

Hui, K. S. and Chao, C. Y. H. (2006) Pure, single phase, high crystalline, chamfered-edge zeolite 4A synthesized from coal fly ash for use as a builder in detergents. Journal of Hazardous Materials, 137 (1). pp. 401-409. ISSN 0304-3894

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Abstract

Single phase chamfered-edge zeolite 4A samples in pure form with a high crystallinity were synthesized by applying step-change of synthesis temperature during hydrothermal treatment of coal fly ash. The calcium binding capacity of these zeolite 4A samples (prepared from coal fly ash) and the commercial detergent grade zeolite 4A were tested for usage as a detergent builder. The results show that these zeolite 4A samples behaved similarly as the commercial one in removing calcium ions during the washing cycle. Moreover, from the leaching tests (evaluation of toxicological safety), the results show that these zeolite 4A samples leached the same elements (Sb, As, Se and Tl) as the commercial one with the concentrations in the same order of magnitude. This shows that the toxicological effect of the coal fly ash converted zeolite 4A was not worse than that of the commercial sample. Finally, economic and environmental aspects of converting coal fly ash to useful products were discussed.

Item Type: Article
Additional Information: Date of Acceptance: 14/02/2006
Uncontrolled Keywords: builder,cost analysis,environmental,recycle,zeolite 4a
Faculty \ School: Faculty of Science > School of Mathematics
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 13:01
Last Modified: 25 Jul 2018 12:43
URI: https://ueaeprints.uea.ac.uk/id/eprint/60677
DOI: 10.1016/j.jhazmat.2006.02.014

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