Removal Of Bisphenol A By Iron Nanoparticle-doped Magnetic Ordered Mesoporous Carbon

With the rapid development of industries, large amounts of various pollutants have been released into the natural environment. The pollution o f endocrine disruptors have been paid more attention. Based on the high reactivity of zero-valent nano iron and the advantages of mesoporous materials as adsorbent and carrier, iron nanoparticle-doped magnetic ordered mesoporous carbon(Fe/OMC) was prepared and applied to removing of bisphenol A(BPA) in simulated wastewater in this study.Fe/OMC was prepared by carbothermal reduction method and then its surface morphology and structure characterization were studied by using scanning electron microscopy(SEM), transmission electron microscopy(TEM), respectively. The experimental outcome demonstrates Fe/OMC has an ordered hexagonal structure with mesopores. The N2 adsorption-stripping isothermal characterization was conducted on the Fe/OMC. It was calculated that its specific surface area is 536 m2/g while the aperture size is about 3.8 nm. According to Zeta potential characterization, its isoelectric point is 4.76. On the base of the magnetic characterization, its material of magnetic intensity was 10.54 emu g- 1, which shows that material has good ability of magnetic separation.Further study was done to explore the best conditions affecting adsorption biodegradation efficiency, including the initial p H value, adsorption time, temperature and initial concentration. The experimental results show that the p H scope for this material is very wide, ranging from 3 to 9. The materials for BPA at room temperature has high removal rate, reaches adsorption equilibrium after about 360 min and meanwhile the maximum BPA adsorption capacity is up to 311 mg/g. These characteristics as easy control of experimental conditions, simple operation method, has exerted a significance for the Fe/OMC practical application. At the same time, the fitting results of the experimental data on the dynamics, the adsorption isotherm and thermodynamics, show that Fe/ OMC has a fairly good potential for adsorption and degradation of BPA.Fe/OMC before and after the adsorption and degradation, was respectively analyzed by X ray diffraction(XRD), Fourier infrared(FTIR) and X-ray photoelectron spectroscopy(XPS), in order to explore the mechanism on adsorption and degradation of BPA. The results show that iron is mainly in the formation of zero-valent nano iron the Fe/ OMC; the removal of BPA in the water body is mainly through adsorption of ordered mesoporous carbon materials and the oxide of nanometer zero-valent iron.