Coagulation behaviour of polyaluminium chloride with different aluminium speciation
Coagulation behaviour of polyaluminium chloride with different aluminium speciation
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DOI：
10.1504/ijep.2011.039102
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发表时间：
2011-03
影响因子：
0.7
通讯作者：
Huijuan Liu;Chengzhi Hu;J. Qu
中科院分区：
文献类型：
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作者：
Huijuan Liu;Chengzhi Hu;J. Qu
采用常规罐法研究了聚氯化铝（PACl）在不同铝种（27Al NMR检测到的Alm、Al13、Alu）含量下的混凝行为，研究了PACl的絮凝速度、颗粒的zeta势和除浊效率。结果表明，Al13具有较高的电荷中和能力，而Alu有助于形成氢氧化物沉淀，其结构较为开放，有利于捕获粒子。混凝剂投加量达到一定值后，电荷中和对混凝的作用减弱，而沉淀物的形成对混凝有明显的促进作用。
The coagulation behaviour of polyaluminium chloride (PACl) with different contents of aluminium species (Alm, Al13, Alu detected by 27Al NMR spectroscopy) was investigated by using the conventional jar test together with studying the rate of floc size development, the zeta potential of particles and turbidity removal efficiency. Results show that Al13 has higher charge neutralisation ability, while Alu species contribute to the formation of hydroxide precipitates which have a rather open structure for capturing particles. The charge neutralisation plays a less important role in coagulation after the coagulant dosage reaching a certain value, while precipitate formation improves coagulation significantly.