Paper Title:

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

Periodical Applied Mechanics and Materials (Volumes 178 - 181)
Main Theme Sustainable Environment and Transportation
Edited by Mingjin Chu, Huizhong Xu, Zhilin Jia, Yun Fan and Jiangping Xu
Pages 613-616
DOI 10.4028/www.scientific.net/AMM.178-181.613
Citation Cui Zhen Sun et al., 2012, Applied Mechanics and Materials, 178-181, 613
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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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.