Adsorption and Fenton Synergistic Process Using Magnetic Co-Fe-Biochar Microsphere for the Removal of Dyes from Aqueous Solution  

作　　者：AN Jing XUE Gang 安婧;薛罡(College of Environmental Science and Engineering,Donghua University)

机构地区：[1]College of Environmental Science and Engineering,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2019年第2期129-139,共11页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China(No.51878135)

摘　　要：To attain a low-cost and high-efficient adsorbent and Fenton catalyst, sludge biochar/nano-cobalt(Co-Biochar) and sludge biochar/nano-cobalt/iron(Co-Fe-Biochar) composites were prepared to use as raw materials, and iron and nano-cobalt as modifiers with a hydrothermal method at 180°C for 3 h. The adsorption effect of different composite materials on low concentration Congo red dyes and synergistic effect of adsorption and high oxidation on high concentration Congo red dyes were studied. The results show that Co-Fe-Biochar has not only adsorption to Congo red dyes but also strong advanced oxidation. The removal rate of Co-Fe-Biochar to high concentration Congo red dyes is as high as 82%. Co-Fe-Biochar were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), nitrogen absorption and desorption(BET), hysteresis loop(VSM), and Fourier transform infrared spectrum(FTIR). It is known that the prepared composite material is a microsphere structure in which nano cobalt is the core and the iron carbon layer is the outer shell. Moreover, the addition of nano cobalt makes the composite have a porous morphology, with the specific surface area of the composite increased from 54.024 m^2/g to 117.753 m^2/g.To attain a low-cost and high-efficient adsorbent and Fenton catalyst,sludge biochar/nano-cobalt(Co-Biochar)and sludge biochar/nano-cobalt/iron(Co-Fe-Biochar)composites were prepared to use as raw materials,and iron and nano-cobalt as modifiers with a hydrothermal method at 180℃ for 3 h.The adsorption effect of different composite materials on low concentration Congo red dyes and synergistic effect of adsorption and high oxidation on high concentration Congo red dyes were studied.The results show that Co-Fe-Biochar has not only adsorption to Congo red dyes but also strong advanced oxidation.The removal rate of Co-Fe-Biochar to high concentration Congo red dyes is as high as 82%.Co-Fe-Biochar were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),nitrogen absorption and desorption(BET),hysteresis loop(VSM),and Fourier transform infrared spectrum(FTIR).It is known that the prepared composite material is a microsphere structure in which nano cobalt is the core and the iron carbon layer is the outer shell.Moreover,the addition of nano cobalt makes the composite have a porous morphology,with the specific surface area of the composite increased from 54.024 m^2/g to 117.753 m^2/g.

关 键 词：hydrothermal method sudge biochar cobalt material ADSORPTION FENTON 

分 类 号：X703[环境科学与工程—环境工程]