Electrokinetic characteristic and co

Electrokinetic characteristic and coagulation behavior of flocculant polyaluminum silicate chloride (PASiC)

The electrokinetic characteristics and coagulation behaviors of polyaluminum silicate chloride (PASiC) and polyaluminum chloride (PAC) were studied and compared by streaming current (SC) measurement and jar test method. The experimental results showed that the interaction between polysilicic acid characterized negative charge and hydrolyzed aluminum species result in a decrease of the charge-neutralizing ability of PAiSC, compared to PAC. The decrease has a close relationship with the basicity (B) and Al/Si molar ratio in PASiC. The less the B value and the Al/Si molar ratio, the lower the charge-neutralizing ability of PASiC is. In contrast, the preparation technique for PASiC affects the charge-neutralization of PASiC to a smaller extent. In addition, compared with PAC, PASiC may enhance aggregating efficiency and give better coagulating effects.

作 者： YUE Qin-yan GAO Bao-yu WANG Bing-jian   作者单位： Department of Environmental Engineering, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China  刊 名： 环境科学学报(英文版)  ISTIC SCI 英文刊名： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2003 15(1)  分类号： X13 X5  关键词： flocculant polyaluminum chloride (PASiC)   streaming current (SC)   electrokinetic characteristics   coagulation effect  

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