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葛根去除水溶液中亚甲基蓝的生物吸附机理和特性

Keywords: 生物吸附,葛根,亚甲基蓝,吸附特性,吸附机理

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Abstract:

对农副产品葛根吸附水溶液中亚甲基蓝的特性和机理进行了一系列的研究。考察了不同条件对吸附效果的影响;采用2种等温线模型和3种动力学模型对吸附机理和动力学特性进行了模拟分析,并计算了相关的热力学函数。结果发现,溶液pH值等实验条件对吸附效果有较大的影响;Langmuir方程能很好地描述其吸附等温线,吸附是一个符合二级动力学过程的物理吸附;热力学函数计算结果显示,此吸附是一个自发的放热过程。在3种不同温度下,由Langmuir方程计算的最大吸附量为98.23、91.04和87.28mg/g,表明葛根是一种良好的,具有一定发展潜力的染料吸附剂。

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