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)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. Belardi, S. Massimilla, L. Piga (literal)
Pagina inizio
  • 167 (literal)
Pagina fine
  • 181 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 24 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 15 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 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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