| Al13形态在混凝中的作用机制 |
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| 引用本文： | 胡承志,刘会娟,曲久辉.Al13形态在混凝中的作用机制[J].环境科学,2006,27(12):2467-2471. |
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| 作者姓名： | 胡承志 刘会娟 曲久辉 |
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| 作者单位： | 中国科学院生态环境研究中心环境水质学国家重点实验室 北京100085;中国科学院生态环境研究中心环境水质学国家重点实验室 北京100085;中国科学院生态环境研究中心环境水质学国家重点实验室 北京100085 |
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| 基金项目： | 国家自然科学基金重点基金项目(50238050);国家杰出青年科学基金项目(50225824) |
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| 摘 要： | 从铝的水解形态转化角度考察了铝盐在高碱度和高有机物浓度水体中的混凝行为.结果表明,铝盐的混凝效能是与混凝过程中的Al13含量成正比.高投药量时氯化铝(AlCl3)既可以有效调节水体pH值又能在混凝过程中原位水解产生较多的Al13形态,因而混凝效能要高于聚合氯化铝(PACl).在铝盐混凝中,调节pH值到6～7之间可以控制铝形态分布从而达到提高混凝效能和减少残留铝的目的.在调节pH值强化混凝的方法中使用传统铝盐的效果要好于无机高分子絮凝剂.
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| 关 键 词： | 絮凝 聚合氯化铝 残留铝 水处理 |
| 文章编号： | 0250-3301（2006）12-2467-05 |
| 收稿时间： | 2005-11-11 |
| 修稿时间： | 1/6/2006 12:00:00 AM |
Coagulation Behavior of Al13 Species |
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| Hu Cheng-zhi,Liu Hui-juan,Qu Jiu-hui.Coagulation Behavior of Al13 Species[J].Chinese Journal of Environmental Science,2006,27(12):2467-2471. |
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| Authors: | Hu Cheng-zhi Liu Hui-juan Qu Jiu-hui |
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| Institution: | 1. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beljing 100085, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Coagulation behavior of Al13 species was examined in synthetic water with high alkalinity and high humic acid concentration from viewpoint of the transformation of Al hydrolysis products during the coagulation process.The results indicated that coagulation efficiency of Al coagulants positively correlated with the content of Al13 in the coagulation process.Aluminum chloride(AlCl3) was more effective than polyaluminum chloride(PACl) in removing turbidity and dissolved organic matter in the synthetic water because AlCl3 could not only generate Al13 species but also function as pH control agent in the coagulation process. During coagulation process pH control can improve coagulation process through regulating Al speciation,and AlCl3 benefited most from pH control. |
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| Keywords: | flocculation polyaluminum chloride residual Al water treatment |
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