改性壳聚糖对染料废水的脱色研究

Study on Decoloring of Dyeing Wasterwater by Modified Chitosan

以壳聚糖(chitosan)为原料,与卤代烷反应进行烷基化改性,用改性后的壳聚糖对酸性铬蓝K、曙红Y和亚甲基蓝的染料废水进行处理,研究了pH、投加量、时间和温度对脱色效果的影响。结果表明,在酸性较强的情况下,添加吸附剂的量有所减少,并且酸性越强,减少量越多;在一定范围内,脱色率随温度的升高而增大;随着吸附剂添加量的增加,脱色率有所提高;对3种不同染料的脱色效果为:酸性铬蓝K>曙红Y>亚甲基蓝;吸附过程能较好地遵循二级动力学模型和Freundlich等温方程。

Taking the Chitosan as the raw material, modifying it with the alkylogen, then taking the modified Chitosan to deal with wastewater dyed with Acid chrome blue K, Eosin Y and Methylene blue. The influence on decolorization effect under the conditions of different pH, dosage, time and temperature was studied. The results indicated that in an stronger acidic situation, the quantity of the sorbent was reduced, and the acidity is stronger, the decrement are more; Base on this, the decolorization rate elevates along with the temperature increases; Along with the sorbent recruitment＇s increment, the decolorization rate enhances; Three different dyes decolorization effects are ： Acid chrome blue K 〉 Eosin Y 〉 Methylene blue ; The adsorption process can follow the second - order kinetics models and the Freundlich isotherm equation well.