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用液相扩散法合成沸石咪唑酯骨架类材料ZIF-8,并向液相中加入不同含量的乙二胺(1、2和3mL)改性,运用X射线衍射仪、扫描电镜、比表面积及孔容吸附测定仪、傅里叶红外光谱仪等进行表征。结果表明:乙二胺的加入在一定程度上改变了ZIF-8的晶体形貌,增加了材料的比表面积。实验对改性ZIF-8吸附水体中砷的实验影响条件如反应浓度、反应时间和酸碱度进行研究探讨。结果表明:在改性ZIF-8使用量为0.04g/L、pH=7、初始砷浓度2.0mg/L和反应2h的条件下,改性ZIF-8对As(Ⅲ)和As(Ⅴ)吸附量分别达到19.87和49.92mg/g。
ZIF-8 zeolite was synthesized by liquid-phase diffusion method. Ethylenediamine (1, 2 and 3 mL) was added into the liquid phase to modify ZIF-8. XRD, SEM, Pore volume adsorption detector, Fourier transform infrared spectroscopy and other characterization. The results showed that the addition of ethylenediamine changed the crystal morphology of ZIF-8 to a certain extent and increased the specific surface area of the material. The experimental conditions affecting the adsorption of arsenic in water by modified ZIF-8 such as reaction concentration, reaction time and pH were studied. The results showed that the effects of modified ZIF-8 on As (Ⅲ) and As (Ⅴ) under the condition of 0.04g / L modified ZIF-8, pH = 7, initial arsenic concentration 2.0mg / L and reaction time 2h, Adsorption capacity reached 19.87 and 49.92mg / g respectively.