| 活性硅酸对铝盐的助凝作用 |
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| 引用本文： | 石健,王东升,邹开云.活性硅酸对铝盐的助凝作用[J].南通大学学报(自然科学版),2014(4):36-39. |
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| 作者姓名： | 石健 王东升 邹开云 |
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| 作者单位： | 南通大学化学化工学院;中国科学院生态环境研究中心 |
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| 基金项目： | 国家自然科学基金项目(21177067);江苏省自然科学基金重点项目(BK2010034);南通市社会发展项目(HS2012001);南通市重点实验室项目(CP12011001);江苏省青蓝工程计划项目 |
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| 摘 要： | 利用水玻璃制备了具有较佳形态的活性硅酸,研究了该活性硅酸对不同B值铝盐助凝时模拟体系的混凝行为.结果表明:该活性硅酸具有明显的助凝效果;当有活性硅酸助凝时,体系Zeta电位明显降低,而除浊效率得到明显提高;有活性硅酸参与下的混凝机理有别于单纯铝盐,活性硅酸的介入会削弱铝盐在混凝中的电中和作用,但同时强化了黏接架桥与网捕卷扫的作用机制.
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| 关 键 词： | 活性硅酸 聚氯化铝 混凝 电性中和 网捕卷扫 |
Improvement Coagulation of Polyaluminum Chloride by Active Silica |
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| Authors: | SHI Jian;WANG Dongsheng;ZOU Kaiyun |
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| Affiliation: | SHI Jian;WANG Dongsheng;ZOU Kaiyun;School of Chemistry and Chemical Engineering, Nantong University;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences; |
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| Abstract: | Activated silicic acid is a common kind of coagulant aids. In this paper the activated silicic acid which has better speciation was prepared by water glass. The coagulation behavior that the effect of better speciation of silica on coagulation of kaolin by iron （III） chloride and PAC1 was investigated in detail. The results showed that the higher dosage of silica, the lower charge-neutralization capability is exhibited. However, the higher dosage of silica, the better turbidity removal is observed. When the active silica participates in the system, the mechanism differs from the coagulation only by iron （Ⅲ） chloride or PACl：the acid silicic can lower charge-neutralization effect, however, their aggregation function can be strengthened at the same time. |
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| Keywords: | active silica polyaluminum chloride coagulation charge-neutralization aggregation function |
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