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Titolo:
The effects of dissolved and colloidal substances on flocculation of mechanical pulps
Autore:
Dunham, AJ; Tubergen, KR; Govoni, ST; Alfano, JC;
Indirizzi:
Nalco Chem Co, Nalco Ctr 1, Naperville, IL 60563 USA Nalco Chem Co Naperville IL USA 60563 lco Ctr 1, Naperville, IL 60563 USA
Titolo Testata:
JOURNAL OF PULP AND PAPER SCIENCE
fascicolo: 3, volume: 26, anno: 2000,
pagine: 95 - 101
SICI:
0826-6220(200003)26:3<95:TEODAC>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATIONIC POLYMERS; SUSPENSIONS; COMPLEXES; SYSTEMS;
Keywords:
dissolved solids; colloids; flocculation; mechanical pulps; bleached pulps; scanning; lasers; microscopy; coagulants; cationic compounds; polyacrylics; acrylamides; silica;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Dunham, AJ Nalco Chem Co, Nalco Ctr 1, Naperville, IL 60563 USA Nalco ChemCo Naperville IL USA 60563 Naperville, IL 60563 USA
Citazione:
A.J. Dunham et al., "The effects of dissolved and colloidal substances on flocculation of mechanical pulps", J PULP PAP, 26(3), 2000, pp. 95-101

Abstract

The effect of dissolved and colloidal substances (DCS) on chemical-inducedflocculation of a bleached mechanical pulp was probed using the technique of focused-beam reflectance measurement (FBRM), also known as scanning laser microscopy (SLM). Addition of DCS to washed fibres decreased the extent of aggregation induced by a cationic polyacrylamide (C-PAM) flocculant and colloidal sodium montmorillonite (NaM) or anionic colloidal silica (ACS). The flocculation activity of the sodium montmorillonite or anionic colloidal silica was more sensitive to DCS addition than that of the cationic flocculant. Addition of low MU: high charge-density cationic coagulants largely reversed the detrimental effects of the DCS and restored the flocculation induced by the C-PAM and the anionic colloidal silica. The DCS was separated into a dissolved and a colloidal component, and the effect of these individual constituents on the extent of aggregation induced by the C-PAM and the anionic colloidal silica was examined.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 15:08:45