改性玉米芯对K-2BP染料的吸附性能及动力学研究

Characteristics and Kinetics of Modified Corncob Adsorbing Reactive Brilliant Red K-2BP

利用氨水对预处理过的玉米芯进行改性,研究改性玉米芯对活性艳红(K-2BP)染料的吸附行为。通过傅里叶红外光谱对改性玉米芯进行结构表征,并考察了pH值、吸附时间、温度和初始浓度对活性艳红K-2BP吸附性能的影响及其吸附动力学性质。结果表明,在pH值1.61、温度30℃和吸附时间10 h条件下吸附效果较佳,其饱和吸附量为22.936 mg·g^(-1),吸附行为符合Langmuir吸附等温线,反应级数符合准二级反应动力学特征,反应活化能为17.655 k J·mol^(-1)。

A study was carried to explore characteristics of corncobs pretreated with ammonia,adsorbing reactive brilliant red K-2BP in wastewater. In the study structure of the modified corncob was characterized with the Fourier transfom infrared spectroscopy （FTIR）. Effects of pH,exposure duration,temperature and initial dye concentration on the corncob adsorbing the dye were deter^mined and kinetics of the adsorption analyzed. Results show that the corncob displayed its opti-mal adsorption efficiency in wastewater 1.61 in pH and 30℃ in temperature for 10 hour,and reached up to 22. 936 mg ·g ^- 1 in saturated adsorption. Besides,its adsorption behavior fitted the Langmuir isotherm and the reaction order fitted the quasisecond order reaction kinetics,and activation energy being 17. 655 kJ·mol^-1 .