Investigation of dynamic processing on aluminum floc aggregation: Cyclic shearing recovery and effect of sulfate ion

被引：0
|
作者：
YongBao Chu
BaoYu Gao
QinYan Yue
Yan Wang
机构：
[1] Qingdao University of Science and Technology,School of Environment and Safety Engineering
[2] Shandong University,School of Environmental Science and Engineering
来源：
Science in China Series B: Chemistry | 2008年 / 51卷
关键词：
Al; species; coagulation dynamics; polyaluminum chloride (PAC); sulfate;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The floc formation and re-aggregation potential and the effects of sulfate on coagulation by AlCl3, polyaluminum chloride (PAC), and Al13 species using a photometric dispersion analyzer (PDA) are investigated. It is found that the recovery level from shearing is the highest for the Al13 species. This is likely a result of increased collision efficiency due to more effective charge neutralization. The experimental results show that sulfate has a significant effect on coagulation and promoting aggregation of hydrolyzed species for the Al13 species. It results in significant improvement of the coagulation efficiency through an electrostatic patch effect. The results further indicate that zeta potential of the particle suspension is not the only indicator for the coagulant efficiency when precipitate formation significantly improves coagulation.
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页码：386 / 392
页数：6
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