活性氧化铝吸附去除偶氮染料活性黑5的研究

A Study on the Adsorption by Activated Alumina to Remove Azo Dye Reactive Black 5

为了解活性氧化铝吸附去除水溶液中偶氮染料的性能,考察了初始染料浓度、吸附剂投加量和pH对吸附作用的影响,分析了活性氧化铝对水中偶氮染料活性黑5的等温吸附特征。结果表明,在初始染料的浓度越高、吸附时间越长,活性氧化铝对活性黑5的吸附量越大,吸附量随吸附剂投加量和pH的增加而降低。相对Freundlich方程式,用Langmuir吸附等温线来描述活性氧化铝对活性黑5的吸附性能更为准确。

In order to understand the adsorption of azo dye in aqueous solution onto activated alumina, effects of the initial concentration of azo dye, dose of adsorbent and pH values on the adsorption reaction were investigated. Isothermal adsorption characteristics of azo dye reactive black 5 in water onto activated alumina were analysed. The result showed that the capacity of activated alumina for adsorbing reactive black 5 increased with higher initial concentration of azo dye and longer reaction duration, but reduced with more dose of adsorbent and higher pH values. Compared with Freundlich equation, the Langmuir adsorption isotherm would be more accurate to describe the adsorption properties of activated alumina for reactive black 5.