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中文摘要：
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值叉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．
英文摘要：
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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