Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/37900
Title: Evaluation of Polyelectrolyte Performance on PCC Flocculation Using the LDS Technique
Authors: Antunes, E. 
Ferreira, P. 
Rasteiro, M. G. 
Garcia, F. A. P. 
Keywords: Floc resistance; Flocculation; Fractal dimension; Light diffraction scattering (LDS); Polyelectrolytes; Reflocculation capacity
Issue Date: 2010
Publisher: Taylor & Francis
Serial title, monograph or event: Particulate Science and Technology
Volume: 28
Issue: 5
Place of publication or event: Philadelphia
Abstract: Flocculation of precipitated calcium carbonate induced by polyelectrolytes was monitored using light diffraction scattering (LDS), which can supply the complete kinetic curve for the flocculation process. Cationic polyacrylamides of very high molecular weight with different charge densities and degrees of branching were tested. The effects of the charge density, degree of branching, and concentration of the flocculant on the flocculation process, as well as on floc resistance and reflocculation capacity, were investigated. Moreover, floc structure was evaluated through the calculation of the fractal dimension using the scattering matrix. The study demonstrates the benefit of using LDS for the evaluation, in a single test, of flocculant performance in the different stages of flocculation: aggregation, stabilization, deflocculation, and reflocculation.
URI: http://hdl.handle.net/10316/37900
ISSN: Print ISSN: 0272-6351
Online ISSN: 1548-0046
Other Identifiers: 10.1080/02726351.2010.504128
DOI: 10.1080/02726351.2010.504128
Rights: closedAccess
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais

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