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Understanding the Precipitated Calcium Carbonate Flocculation Mechanism Induced by Starch through Population Balance Modeling

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Abstract:

The precipitated calcium carbonate (PCC) flocculation kinetics and floc structures induced by cationic tapioca starch were recorded by the Malvern Mastersizer 2000 (Malvern Instruments Inc, Malvern, UK). Of particular interest, a population balance model for PCC flocculation was employed to extract the flocculation constants, namely collision efficiency, magnitude of energy dissipation rate and restructuring rate. The model made an attempt to take aggregation, breakage and flocs restructuring into account simultaneously to describe the PCC flocculation by aggregation and breakage mechanism. Through a response surface methodology (RSM) involving a central composite design, the effects of temperature, polymer dosage, ionic strength, and shear rate on flocculation parameters were investigated in this paper.

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Periodical:

Advanced Materials Research (Volumes 236-238)

Pages:

1250-1255

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.236-238.1250

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Online since:

May 2011

Authors:

Yi Zhou Sang, Nayef M. Al Saifi, Peter Englezos

Keywords:

Collision Efficiency, Collision Frequency, Energy Dissipation Rate, Flocculation Kinetics, Population Balance Equation, Response Suface Methodology (RSM), Restructuring Rate

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

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DOI: 10.1021/ie034236y

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