摘要：

以粉煤灰（FA）经碱熔融和酸处理制得活性粉煤灰（AFA），并将其用于模拟废水中活性深蓝K-R的吸附，探讨了AFA的制备条件和影响吸附的因素。结果表明：在m（Na₂CO₃）：m（FA）为1：5，焙烧温度为850 ℃，HCl浓度为4 mol/L ，搅拌溶解温度为80 ℃的制备条件下，所制得的AFA对3 500 mg/L活性深蓝K-R的吸附量为335.98 mg/g，活性深蓝K-R去除率达94.5%；染料起始浓度、pH、吸附时间和温度均对吸附效果产生影响；吸附动力学可用准二级吸附动力学方程进行描述（R²=1.000）；等温吸附符合 Langmuir方程。AFA可有效去除水溶液中高浓度的活性深蓝K-R。

关键词: 粉煤灰, 碱熔融, 活性深蓝K-R, 吸附动力学, 等温吸附

Abstract:

Activated fly ash(AFA) has been prepared by fly ash which was alkali-melted and acid treated. It can be used for the adsorption of reactive deep blue K-R from simulated wastewater. The optimal preparation conditions of AFA and the factors that affect adsorption are discussed. The results show that when m(Na₂CO₃):m(FA) is 1:5, calcination temperature 850 ℃,HCl concentration 4 mol/L,and stirring solution temperature 80 ℃,the adsorption capacity of prepared AFA for 3 500 mg/L of reactive deep blue K-R is 335.98 mg/g,and the removing rate of reactive deep blue K-R reaches 94.5%. The initial concentration of dye,pH,and adsorption time and temperatare all have effects on adsorption effectiveness. Adsorption kinetics can be described by pseudo-second-order kinetic equation(R²=1.000). The adsorption isotherm agrees with the Langmuir equation. AFA is an effective adsorbent for the removal of reactive decp blue K-R with high concentration from aqueous solution.

Key words: fly ash, alkali-melting, reactive deep blue K-R, adsorption kinetics, isothermal adsorption

中图分类号: 

• X703