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采用ZnCl_2活化法制备了枣核活性炭,研究了枣核活性炭对罗丹明B的吸附性能。采用低温氮气吸附脱附、FT-IR等方法对活性炭进行表征,结果显示,活性炭是中孔结构,中孔容为0.92cm~3/g,平均孔径为3.1 7nm,BET比表面积达1223.25m~2/g。研究了溶液初始浓度、吸附时间和活性炭质量浓度等因素对平衡吸附量的影响,以及罗丹明B在枣核活性炭上的吸附平衡与动力学。通过Langmuir等6种吸附等温模型对吸附数据进行拟合,结果表明,Redlich-Peterson模型能较好地描述罗丹明B在活性炭上的吸附平衡;动力学研究表明,该吸附过程符合Elovich模型。
Zinc nucleus activated carbon was prepared by ZnCl 2 activation method, and the adsorption of rhodamine B by activated carbon of Zizyphus jujuba was studied. The results show that the activated carbon is mesoporous structure, the mesopore volume is 0.92cm ~ 3 / g, the average pore diameter is 3.1 7nm, the BET specific surface area is 1223.25m ~ 2 / g. The effects of initial concentration of the solution, adsorption time and mass concentration of activated carbon on the equilibrium adsorption capacity were investigated. The adsorption equilibrium and kinetics of rhodamine B on the activated carbon of Zaopold were studied. The adsorption data were fitted by six adsorption isotherms such as Langmuir. The results show that the Redlich-Peterson model can well describe the adsorption equilibrium of Rhodamine B on activated carbon. Kinetic studies show that the adsorption process accords with the Elovich model.