Received date: 2004-11-09
Online published: 2010-10-01
A new kind of highly efficient decolouriser has been synthesiz ed with chitosan- dicyandiamine as main raw material to treat the dye wastewater. The decolorization rates of the 4 typical types of dye-stuff (500 mg/L)unde r the tests are all over 90%. The results of experiments show that under the con ditions of the reaction temperature is 50 ℃, n(chitosan) ∶ n(dicyandiamine ) ∶ n(aluminum sulfate) = 1 ∶ 4 ∶ 1.5, reaction time is 2.5 h, the decol orization rates are the best. The results show that the decolorization rates of chitosan - dicyandiamine decolouriser are much higher than chitosan, which is u sed in combination with aluminum sulfate. The treatment effect to wastewater of Shangyu Wastewater Factory has been studied. The result indicates that the COD r emoval rate is 20% higher than PAC, which was used in the past in this factory.
Key words: chitosan; dicyandiamine; decolouriser; dye wastewater
An Zhongjun, Huang Keling, Lu Hang, Wen Yuezhong, Liu Weiping . Synthesis and application of chitosan - dicyandiamine decolouriser[J]. Industrial Water Treatment, 2005 , 25(6) : 46 -49 . DOI: 10.11894/1005-829x.2005.25(6).46
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