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Titolo:
EFFECTS OF SURFACTANTS ON PARTICLE ADHESION - II - INTERACTIONS OF MONODISPERSED COLLOIDAL HEMATITE WITH GLASS-BEADS IN THE PRESENCE OF 1-DODECYLPYRIDINIUM CHLORIDE
Autore:
ZELENEV A; PRIVMAN V; MATIJEVIC E;
Indirizzi:
CLARKSON UNIV,CTR ADV MAT PROC POTSDAM NY 13699 CLARKSON UNIV,CTR ADV MAT PROC POTSDAM NY 13699
Titolo Testata:
Colloids and surfaces. A, Physicochemical and engineering aspects
fascicolo: 1-3, volume: 135, anno: 1998,
pagine: 1 - 10
SICI:
0927-7757(1998)135:1-3<1:EOSOPA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
HETEROGENEOUS POROUS-MEDIA; METAL-OXIDE SURFACES; MODEL SYSTEMS; MULTILAYER DEPOSITION; IRREVERSIBLE ADSORPTION; ANIONIC SURFACTANTS; KINETICS; CHARGE; TRANSPORT; STEEL;
Keywords:
ADHESION OF PARTICLES; DETACHMENT OF PARTICLES; HEMATITE ADHESION; IRON OXIDE ON GLASS; PARTICLE ADHESION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
A. Zelenev et al., "EFFECTS OF SURFACTANTS ON PARTICLE ADHESION - II - INTERACTIONS OF MONODISPERSED COLLOIDAL HEMATITE WITH GLASS-BEADS IN THE PRESENCE OF 1-DODECYLPYRIDINIUM CHLORIDE", Colloids and surfaces. A, Physicochemical and engineering aspects, 135(1-3), 1998, pp. 1-10

Abstract

The kinetics of deposition of colloidal hematite particles on glass beads in the presence of a cationic surfactant, 1-dodecylpyridinium chloride (DPC), at pH 4.0 and 10.5 was studied using the packed column technique. At the high pH, the surfactant adsorbed both on particles andbeads, which influenced the attachment process; depending on conditions either monolayer or multilayer deposition was observed. At pH 4.0, only a monolayer of hematite formed at all surfactant concentrations used. At this pH value, the DPC adsorbed little on particles but significantly on beads, making a part of the collector surface inaccessible for the particle attachment. A modification of the multilayer adhesiontheory was proposed which allows one to account for the latter effect. The kinetics of particle release from the monolayer, by rinsing the loaded column with 10(-2) mol dm(-3) NaOH solutions, was also investigated. It was shown that the detachment rate was insensitive to the amount of surfactant present in the dispersions used for the deposition. (C) 1998 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 17:48:47