提取废旧锌锰电池中的锰氧化物灼烧制备Mn2O3,利用X射线衍射分析仪和扫描电子显微镜对产物进行表征.通过系列吸附实验探究Mn2O3作为吸附剂对甲基橙和茜素红染料的吸附机理和最佳吸附条件.结果表明,产物是粒径为500~1000 nm的菱形多面体结构Mn2O3,对甲基橙和茜素红的吸附动力学均符合准二级动力学方程,热力学均符合Langmuir吸附方程;在最佳吸附条件pH值为2、吸附时间180 min、染料初始浓度为30 mg/L、Mn2O3投加量分别为24.62,35.56 g/g时,甲基橙和茜素红的吸附效果最佳.%Mn2O3 was prepared by calcining manganese oxides obtained from spent zinc-manganese dry battery,and the sample was characterized by X-ray diffraction(XRD)and scanning electron microscopy (SEM).The adsorption mechanism and optimum adsorption conditions of Mn 2O3 for the methyl orange and Alizarin red were studied through a series of adsorption experiments.The results show that the product Mn2O3 is diamond polyhedron with a diameter of 500~1 000 nm,the adsorption kinetics of Mn 2O3 for the methyl orange and Alizarin red are both in accordance with the pseudo-second-order kinetic equation and adsorption thermodynamics are in accordance with Langmuir isotherm formula.The optimum adsorption effect achieves under the optimum conditions of pH 2,adsorption time 180 min,initial concentration 30 mg/L,Mn2O3dosage 24.62,35.56 g/g respectively.
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