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利用浸渍-碱性微波法制备载磁粉末活性炭,通过等温吸附实验和动力学吸附实验,研究对比了其与原料活性炭、浸渍载铁活性炭对壬基酚的吸附性能。采用氮气吸附仪、FTIR、XRD、国标(GB/T12496.19-1999)邻菲啰啉分光度法及VSM,分别对3种样品进行了物相结构、表面官能团、铁含量及磁性能的分析,并探讨了吸附机理。结果表明,浸渍-碱性微波法载磁活性炭的总孔容及孔隙率均有较大提高;其吸附等温线符合Freundich方程,吸附动力学过程符合准二级动力学方程与孔道内扩散模型,相关系数R2均大于0.900。原活性炭经一定浓度的铁盐溶液浸渍后,铁含量由2%提高到8%。在碱性、N2气氛条件下微波后,铁系物主要存在形式为零价铁和Fe3O4,制得的载磁活性炭饱和磁化强度为1.12 emu/g。
The impregnated-alkaline microwave method was used to prepare the magnetic powder-loaded activated carbon. The adsorption performance of non-phenol on non-phenol was investigated by isothermal adsorption experiment and kinetic adsorption experiment. The phase structure, surface functional groups, iron content and magnetic properties of the three samples were analyzed by nitrogen adsorption, FTIR, XRD, GB / T12496.19-1999 spectrophotometry and VSM respectively , And discussed the adsorption mechanism. The results showed that the total pore volume and porosity of impregnated-alkaline microwave activated carbon were greatly increased. The adsorption isotherms fitted the Freundlich equation and the adsorption kinetics were in accordance with quasi-second-order kinetic equation and intra-duct diffusion model. Correlation coefficient R2 is greater than 0.900. After the activated carbon was impregnated with a certain concentration of iron salt solution, the iron content increased from 2% to 8%. After the microwaves were treated under basic atmosphere and N2 atmosphere, the main existing forms of ferrous materials were zero-valent iron and Fe3O4, and the saturation magnetization of the prepared magnetic activated carbon was 1.12 emu / g.