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Titolo:
CATION-EXCHANGE REACTIONS OF A SEDIMENTARY CHABAZITE
Autore:
TORRACCA E; GALLI P; PANSINI M; COLELLA C;
Indirizzi:
UNIV NAPLES FEDERICO II,DIPARTIMENTO INGN MAT & PROD NAPLES ITALY UNIV NAPLES FEDERICO II,DIPARTIMENTO INGN MAT & PROD NAPLES ITALY UNIV ROMA LA SAPIENZA,DIPARTIMENTO CHIM I-00185 ROME ITALY UNIV ROMA 3,DIPARTIMENTO DISCIPLINE SCI CHIM & INFORMAT ROME ITALY
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
fascicolo: 1-3, volume: 20, anno: 1998,
pagine: 119 - 127
SICI:
1387-1811(1998)20:1-3<119:CROASC>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
ZEOLITES; WATER;
Keywords:
SEDIMENTARY CHABAZITE; CATION EXCHANGE; LEAD; AMMONIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
E. Torracca et al., "CATION-EXCHANGE REACTIONS OF A SEDIMENTARY CHABAZITE", MICROPOROUS AND MESOPOROUS MATERIALS, 20(1-3), 1998, pp. 119-127

Abstract

The ion exchange behaviour of a Na-exchanged sedimentary chabazite for Pb2+, NH4+, K+, Ca2+ and Mg2+ was investigated. Equilibrium data were obtained at 25 degrees C for Pb2+, NH4+ and K+ and interpreted in terms of two different cation sites in the zeolite framework. A good selectivity was observed for NH4+ and Pb2+ and the selectivity sequence NH4+>K+>Pb2+>Na+ was determined. Very low exchange rates were found forCa2+ and Mg2+ whereas fast kinetics were observed for NH4+ and Pb2+ either by chabazite in its original composition or especially by Na-exchanged chabazite. (C) 1998 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 10:35:48