http://www.cnr.it/ontology/cnr/individuo/prodotto/ID224620
Crystallization of K-L and K-W zeolites from fly-ash (Articolo in rivista)
- Type
- Label
- Crystallization of K-L and K-W zeolites from fly-ash (Articolo in rivista) (literal)
- Anno
- 1998-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/S0921-3449(98)00016-0 (literal)
- Alternative label
G. Belardi, S. Massimilla, L. Piga (1998)
Crystallization of K-L and K-W zeolites from fly-ash
in Resources, conservation and recycling; Elsevier, Amsterdam (Paesi Bassi)
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- G. Belardi, S. Massimilla, L. Piga (literal)
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- Mineral Processing Institute, CNR, Via Bolognola, 7, Rome, Italy
Geologist, Sapri, Salerno, Italy (literal)
- Titolo
- Crystallization of K-L and K-W zeolites from fly-ash (literal)
- Abstract
- The experimental conditions for the synthesis of K-L and K-W zeolites by hydrothermal alkaline treatment of coal-fired power plants fly-ash (FA) have been established. Thanks to their high stability in acid environments, these zeolites--in their sodic form--can be utilized to remove the ammonium ion NH4 _ from municipal and industrial wastewaters. The addition of SiO2 to FA or to the alkaline solution increases the Si:Al ratio of the slurry. This boosts the selectivity of the synthesis, ensures larger amounts of K-L and K-W zeolites, and prevents the formation of phases such as kaliophilite that are unsuitable for absorption. The zeolites thus synthesized exhibit high thermal stability up to 600°C. Industrial use of such zeolites could generate additional income for power producers and reduce the expenditure incurred in storing FA or wasting it to landfill. (literal)
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