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Performance and Mechanism of Polyferric Aluminum Chloride – Quaternary Ammonium Salt Composite Flocculants in Treating Surface Water

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Abstract:

A new composite coagulant, polymeric ferric aluminum chloride-polydimethyl diallylammonium chloride (PFAC-PD), was prepared by combing Polymeric ferric aluminum chloride (PFAC) with polydimethyl diallylammonium chloride (PDMDAAC). The turbidity, ultraviolet absorbance at 254 nm (UV254) and specific ultraviolet absorbance (SUVA) removal and flocculating mechanisms of the new composite coagulant and the traditional coagulants (PFAC, adding PFAC before adding PDMDAAC and adding PFAC after adding PDMDAAC) were investigated in treating surface water. The results indicated that the new composite coagulants exhibited better flocculation efficiency than PFAC and successive addition of PFAC and PDMDAAC. The neutralization ability of the coagulants was in the following order: PFAC-PD > PD+PFAC > PFAC+PD > PFAC.

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Periodical:

Applied Mechanics and Materials (Volumes 178-181)

Pages:

613-616

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.178-181.613

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Online since:

May 2012

Authors:

Cui Zhen Sun, Qing Chun Liu, Li Zhu, Jing Liu, Rui Min Mu

Keywords:

Coagulation Mechanism, Composite Flocculant, Flocculation Efficiency, Humic Acid (HA)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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