凹凸棒土/聚合铝铁絮凝剂制备因素的研究

Study on The Factor of Preparation Attapulgite/Polymeric Iron Alum Flocculant

以亚铁盐和铝盐为原料,采用分步滴定法制备凹凸棒土/聚合铝铁复合絮凝剂(APAFC),考察了原料配比、反应温度、pH值对复合絮凝剂性能的影响。结果表明:在pH值为3、m(凹凸棒土)∶m(FeSO4)∶m(AlCl3)为1∶0.05∶0.1、反应温度为60℃条件下,复合絮凝剂絮凝性能最佳。COD去除率为80%以上,浊度去除率为90%以上。

Attapulgite - existed aluminium and iron compound flocculating agent （APAFC） was prepared from ferrite salt and aluminium salt by the method of step-by-step dripping reaction. The effect of the quality ratio of raw materials, reaction temperature and pH value were observed. The experimental results showed that the best conditions of preparing attapulgjte - existed iron and aluminium compound flocculating agent were that the mass ratio of attapulgite and FeSO4 and AlCl3 was 1 ： 0.05 ： 0.1, the reaction temperature was 60℃ and pH value was 3, the removal rate of COD and turbidity were more than 80% and 90% ,respectively.