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Titolo:
Use of scanning laser microscopy to investigate microparticle flocculationperformance
Autore:
Alfano, JC; Carter, PW; Whitten, JE;
Indirizzi:
Nalco Chem Co, Naperville, IL 60563 USA Nalco Chem Co Naperville IL USA 60563 o Chem Co, Naperville, IL 60563 USA
Titolo Testata:
JOURNAL OF PULP AND PAPER SCIENCE
fascicolo: 6, volume: 25, anno: 1999,
pagine: 189 - 195
SICI:
0826-6220(199906)25:6<189:UOSLMT>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUSPENSIONS; KINETICS; SYSTEMS; SILICA;
Keywords:
scanning; lasers; microscopy; flocculation; silica; colloids; acid pulping; fine papers; particles; starch; aluminum sulfate; cationic compounds; polyacrylics; acrylamide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Alfano, JC Nalco Chem Co, 1 Nalco Ctr, Naperville, IL 60563 USA Nalco ChemCo 1 Nalco Ctr Naperville IL USA 60563 IL 60563 USA
Citazione:
J.C. Alfano et al., "Use of scanning laser microscopy to investigate microparticle flocculationperformance", J PULP PAP, 25(6), 1999, pp. 189-195

Abstract

Scanning laser microscopy (SLM) was used to evaluate the flocculation of an acid fine paper furnish by a treatment program consisting of starch, alum, cationic-poly(acrylamide) (C-PAM), and a colloidal silica microparticle. C-PAM caused a transient increase in floc size, as measured by the mean chord length parameter which decayed rapidly under the influence of shear. Microparticle addition resulted in a more shear resistant reflocculation of the furnish, suggesting that the microparticle plays a role in increasing floc strength. An inverse correlation of SLM peak mean chord length with dynamic drainage jar (DDJ) turbidity was observed. Studies of salt-induced aggregation silica revealed that simple aggregation does not always effect an improvement in microparticle activity These results suggest that the microparticle performance of aggregated silica depends upon details of the silica structure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 12:52:48