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Titolo:
ION-EXCHANGE BETWEEN NH4+ SATURATED ZEOLITES AND ESSENTIAL CATIONS OFTHE SOIL SOLUTION (K+, NA+, CA2+, AND MG2+)
Autore:
KOVANDA F; KUSA H; KOLOUSEK D;
Indirizzi:
INST CHEM TECHNOL,DEPT SOLID STATE CHEM,TECHNICKA 5 CR-16628 PRAGUE CZECH REPUBLIC
Titolo Testata:
Ceramics-Silikaty
fascicolo: 2, volume: 40, anno: 1996,
pagine: 61 - 66
SICI:
0862-5468(1996)40:2<61:IBNSZA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
F. Kovanda et al., "ION-EXCHANGE BETWEEN NH4+ SATURATED ZEOLITES AND ESSENTIAL CATIONS OFTHE SOIL SOLUTION (K+, NA+, CA2+, AND MG2+)", Ceramics-Silikaty, 40(2), 1996, pp. 61-66

Abstract

Cation-exchange reactions between NH4+ saturated zeolites and solutions containing essential cations occurring as main cations in natural soil solutions (K+, Na+, Ca2+, Mg2+) were studied. Natural clinoptilolite and two synthetic zeolites (P-c and phillipsite) prepared by hydrothermal alteration of power station fly ashes were used as zeolites andsaturated with NH4+ in a NH4Cl solution (c = 5 mol l(-1)). K+ and Ca2 yielded the best cation-exchange in the case of all three zeolites. The equilibrium isotherms of ion-exchange reactions were measured in concentration limits usual for real soil solutions. The obtained results indicate that the NH4+ ions might be relatively quickly released to the soil solution after the application of NH4+ saturated zeolites to the soil. The exchange occurs preferably with K+ ions (and also with Ca2+ in the case of the P-c zeolite) present in the soil solution.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/10/20 alle ore 19:11:08