介微孔复合沸石分子筛对重金属离子吸附性能的实验研究

以介微孔复合沸石分子筛MCM-41／ZSM-3为吸附剂，采用静态吸附方法初步研究了其对重金属离子Cu^2 、Zn^2 、Pb^2 、Cd^2 的吸附性能。结果表明：对于配置的60mg／dm^3重金属离子溶液，使用分子筛用量为10g／dm^3时，在较宽的pH范围内MCM-41／ZSM-3对Cu^2 、Zn^2 、Pb^2 、Cd^2 的吸附率可达90％以上；对等温吸附曲线的回归分析得出Cu^2 、Zn^2 、Pb^2 、Cd^2 在实验浓度范围内符合Langmuir单吸附位吸附曲线且具有较大的吸附容量。

An experimental study of adsorption properties of micro-pore molecular sieves for heavy metals ions

In this paper, the adsorption properties of micro-pore molecular sieves for Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) have been studied. Experiments show that under the condition of wide pH range, molecular sieves of 10 g/dm~3 and heavy metals ions of 60 mg/dm~3, the adsorption rates of MCM-41/ZSM-3 for Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) are higher than 90%. The regression equation indicates that the adsorption of Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) in the experimental concentration range is coincident with the single site Langmuir sorption and has remarkable adsorption capacity.