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Titolo:
EFFECT OF UREA ON THE STABILITY OF FERRIC-OXIDE HYDROSOLS
Autore:
AMHAMDI H; DUMONT F; BUESSHERMAN C;
Indirizzi:
FREE UNIV BRUSSELS,FAC SCI,CHIM ANALYT SERV,CPI 255,2 BLVD TRIOMPHE B-1050 BRUSSELS BELGIUM FREE UNIV BRUSSELS,FAC SCI,CHIM ANALYT SERV B-1050 BRUSSELS BELGIUM
Titolo Testata:
Colloids and surfaces. A, Physicochemical and engineering aspects
fascicolo: 1, volume: 125, anno: 1997,
pagine: 1 - 3
SICI:
0927-7757(1997)125:1<1:EOUOTS>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Keywords:
ALPHA-HEMATITE HYDROSOLS; IONIC ADSORPTION SEQUENCE; STABILITY; UREA; WATER STRUCTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
H. Amhamdi et al., "EFFECT OF UREA ON THE STABILITY OF FERRIC-OXIDE HYDROSOLS", Colloids and surfaces. A, Physicochemical and engineering aspects, 125(1), 1997, pp. 1-3

Abstract

The effect of urea on the stability of alpha-haematite hydrosols was studied in the presence of various monovalents ions on each side of the point of zero charge (PZC) (pH 8.2). It was observed that for pHs lower than the PZC, the presence of urea stabilizes the hydrosols by increasing the critical coagulation concentration values for all anions used in this study. However, for pHs higher than the PZC, an inversion of the cationic adsorption sequence was observed. This behaviour is inagreement with the well known action of urea on the structure of water and also with the general properties of the alpha-haematite water/interface. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 11:02:15