铁锌复合金属有机碳材料对酸性橙7的吸附作用研究

Adsorption property of ZnO/Fe3O4@C on AO7

基于铁锌金属有机骨架,制备铁锌复合金属有机碳材料(ZnO/Fe3O4@C),并进行了ZnO/Fe3O4@C吸附酸性橙7(AO7)的研究,考察初始pH、AO7初始浓度、ZnO/Fe3O4@C用量等因素对AO7吸附量的影响,并分析了吸附材料对AO7的吸附动力学模型。结果表明,pH对吸附效果有较大的影响,ZnO/Fe3O4@C在酸性条件下显示出了良好的吸附性能,在pH=3.0,AO7初始浓度在10~30μmol/L变化时,单位吸附量随着AO7浓度的增加而增大;在pH=3.0,AO7浓度为20μmol/L,ZnO/Fe3O4@C用量为0.5g/L条件下,吸附效果最好,ZnO/Fe3O4@C对AO7的降解率可达到92.90%。研究结果还表明,吸附动力学符合假二级动力学模型,化学吸附是其主要速度控制步骤。

The iron-zinc composite metal carbon material(ZnO/Fe3O4@C)was prepared based on Fe-Zn metal organic framework.And adsorption experiment was carried on the acid orange 7(AO7).The influence of initial pH,initial concentration of AO7,dosages of ZnO/Fe3O4@C and other factors on AO7 adsorbing capacity were investigated.And AO7 adsorption dynamics model was analyzed.The results showed that pH had a great influence on adsorption effect,and ZnO/Fe3O4@C showed good adsorption performance under acidic conditions.Meanwhile,the data showed that when pH=3.0 and the initial concentration of AO7 changed from 10 to 30μmol/L,the unit adsorption amount increased with the increase of AO7 concentration.When pH=3.0,the concentration of AO7 was 20μmol/L and the dosage of ZnO/Fe3O4@C was 0.5g/L,the adsorption effect was the best,and the degradation rate of ZnO/Fe3O4@C to AO7 was 92.90%.The results showed that the adsorption kinetics conformed to the pseudo-second-order kinetic model,and chemical adsorption was the main speed control step.