介孔Zn-si材料对水中亚甲基蓝的吸附研究

摘要

A series of Zn modified silicon oxide(0. 1Zn-Si,0. 2Zn-Si and 0. 4Zn-Si)mesoporous materi-als and pure silicon oxide(0. 0Zn-Si)had been prepared by chemical corprecipitation method,and the adsorption capacity of the Zn-Si mesoporous materials with respect to MB was investigated. The effects of initial solution pH,contact time and temperature on MB adsorption had been investigated. The results showed that Zn-Si have a superior adsorption capability compare with pure SiO2 under acid condition. Un-der certain conditions,the adsorption capability of MB on 0. 2Zn-Si can get 228. 88 mg/g. The pseudo-second-order model and Langmuir adsorption isotherm model could be well fit to the experimental data of adsorption MB onto Zn-Si samples.%采用化学沉淀法制备了一系列的Zn改性氧化硅（0.1Zn-Si、0.2Zn-Si和0.4Zn-Si ）和纯氧化硅（0.0Zn-Si）介孔材料，并探讨了介孔Zn-Si材料对亚甲基蓝（ MB）的吸附行为。详细的考察了pH、时间和温度对吸附量性能的影响。结果表明，在酸性条件下，Zn-Si样品的吸附容量高于纯的 SiO2材料，特别是0.2Zn-Si样品的吸附量达到228.88 mg/g；实验数据表明，Zn-Si介孔材料对亚甲基蓝的吸附过程符合假二级动力学方程和Langmuir等温吸附模型。