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Titolo:
EVALUATION OF MECHANICAL AND LEACHING PROPERTIES OF CEMENT-BASED SOLIDIFIED MATERIALS ENCAPSULATING CD-EXCHANGED NATURAL ZEOLITES
Autore:
CIOFFI R; PANSINI M; CAPUTO D; COLELLA C;
Indirizzi:
UNIV NAPLES FEDERICO II,DIPARTIMENTO INGN MAT & PROD,PIAZZALE V TECCHIO 80 I-80125 NAPLES ITALY UNIV NAPLES FEDERICO II,DIPARTIMENTO INGN MAT & PROD I-80125 NAPLES ITALY
Titolo Testata:
Environmental technology
fascicolo: 11, volume: 17, anno: 1996,
pagine: 1215 - 1224
SICI:
0959-3330(1996)17:11<1215:EOMALP>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Keywords:
PHILLIPSITE; CHABAZITE; ION EXCHANGE; CADMIUM REMOVAL; BLENDED CEMENT; CADMIUM STABILIZATION-SOLIDIFICATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
R. Cioffi et al., "EVALUATION OF MECHANICAL AND LEACHING PROPERTIES OF CEMENT-BASED SOLIDIFIED MATERIALS ENCAPSULATING CD-EXCHANGED NATURAL ZEOLITES", Environmental technology, 17(11), 1996, pp. 1215-1224

Abstract

Cheap, naturally occurring, powdered zeolite-bearing materials, containing large amounts of phillipsite and chabazite, are used as a directaddition to water to remove cadmium. The resulting Cd-bearing naturalzeolite sludges are subsequently stabilized-solidified in a cement matrix. The solidified wastes are evaluated using an international protocol which involves measuring the mechanical strengths of hardened pastes and a careful characterization of their leaching behaviour by meansof different leaching tests. The results of stabilization-solidification runs appear to be positive as good containment of cadmium in the cement matrix is achieved. On the contrary ion exchange runs confirm the moderate selectivity of either phillipsite or chabazite for cadmium,suggesting that the proposed procedure can only be profitably used inthe presence of low cadmium loadings and low interfering cations concentration in the wastewaters. The Cd-bearing natural zeolite sludge-Portland cement blends obtained could find an advantageous utilization in the field of building materials.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/10/20 alle ore 02:10:04