化工进展

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聚合氯化铝镁絮凝剂的制备及处理印染废水

刘桂萍,孙慎文,刘长风,王明杰   

  1. 沈阳化工大学环境与生物工程学院,辽宁 沈阳 110142
  • 出版日期:2010-10-05 发布日期:2010-10-05

Treatment of printing and dyeing wastewater with polymeric aluminum magnesium chloride aluminum magnesium chloride

LIU Guiping,SUN Shenwen,LIU Changfeng,WANG Mingjie   

  1. College of Environmental and Biological Engineering,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning,China
  • Online:2010-10-05 Published:2010-10-05

摘要:

以铝矾土、氧化镁粉和质量分数为20%的工业盐酸为原料,采用两段溶出工艺制备聚合氯化铝镁无机絮凝剂。通过正交实验考察了焙烧温度、焙烧时间、酸溶比例、酸溶时间和酸溶温度对氧化铝溶出的影响,确定了制备聚合氯化铝的最佳工艺条件。通过加入氧化镁粉提高产品盐基度得到聚合氯化铝镁絮凝剂。所得产品氧化铝含量9.6%,盐基度为46.3%。将该聚合氯化铝镁絮凝剂用于实际印染废水的处理,其COD和色度去除率比自制聚合氯化铝絮凝剂和市售聚合氯化铝絮凝剂均高出近20个百分点。

Abstract:

Polymeric aluminum magnesium chloridePAMCflocculant was prepared with two-step leaching process from bauxite oresmagnesium oxide and hydrochloric acid20%. The optimum preparation conditions were determined via orthogonal test by investigating the influence of sintering temperature and sintering timeas well as acid soluble ratetime and temperature on the leaching of PAMC. PAMC flocculant was prepared with basicity improvement by adding magnesium oxide. The obtained PAMC flocculantwhich contains 9.6% of aluminum oxides and 46.3% of basicityshowed higher COD and color removal rate by approximately 20% as compared with that self-made or commercial available polymeric aluminum chloride flocculant when practically used in printing and dyeing wastewater treatment.

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