新生态MnO_2在碱法制浆废水处理中的应用

Adsorptive decolorization of reactive dyes on the fresh MnO_2

首次研究了新生态MnO2 对碱法麦草浆造纸黑液的CODCr和色度去除效果及其主要影响因素 ,并探讨MnO2 的作用机理。实验结果表明 ,新生态MnO2 是准球形颗粒 ,平均粒径为2 5 0nm ,pH值是影响CODCr和色度去除率的最主要因素 ,黑液初始浓度、新生态MnO2 投加量、环境温度对黑液处理效果有不同程度的影响。当 pH≤ 1.5时 ,才有明显的CODCr和色度去除效果 ,色度去除率远高于CODCr去除率 ,升高温度、增加新生态MnO2 投加量有利于提高黑液的处理效果。初步推断 ,新生态MnO2

The decolorization of reactive dyes on fresh MnO 2 was studied. And the effect factors of adsorption were investigated in detail. The experimental results showed that the adsorptive ability of the fresh MnO 2 was very strong. When the concentration of dye wastewater was 200 mg/L, the efficiency of decolorization reached 89～100%. The adsorption system was influenced by pH value, the amount of fresh MnO 2 added, adsorption time and temperature. Among them pH value was the key factor. The data was conformed to Langmuir isotherm equation.