摘要
采用共沉淀法,以酵母菌为基质,用FeCl3.6H2O和FeCl2.4H2O制备磁性酵母菌微球体(M@Y)。用扫描电子显微镜、X射线衍射仪、振动样品磁强计对材料进行分析表征,并研究了磁性酵母菌微球体对四环素的吸附作用。结果表明,制备的磁性酵母菌微球体粒径为2.5～2.8μm;Fe3O4晶粒度为15.5 nm,磁饱和强度为34.40 emu/g。当溶液pH为6.5左右时,磁性酵母菌微球体对盐酸四环素的吸附容量为26.96 mg/g;磁性酵母菌微球体对四环素的吸附符合Freundlich等温方程和假一阶动力学方程。
Magnetic nanoparticles were attached to yeast by co-precipitation reaction of FeC13 ·6H20 and FeC12 · 4H20. Then, magnetic yeast microspheres （M@ Y） were characterized by scanning electron mi- croscopy （SEM）, X-ray diffraction （XRD）, vibrating sample magnetometer （VSM）. M@ Y exhibited uni- form morphology and magnetic property （Ms = 34.40 emu/g）. Batch mode adsorption studies were car ried out to investigate the adsorption of tetracycline based on M@ Y. The Freundlich isotherm model was fitted to the equilibrium data and the adsorption capacity of M@ Y was 26.96 mg/g at pH = 6.5. The ki- netic properties of M @ Y were well described by the pseudo-first-order equation. The M @ Y prepared were applied to the separation of tetracycline from experimental samples successfully.
出处
《应用化工》
CAS
CSCD
2012年第12期2099-2102,共4页
Applied Chemical Industry
基金
高等学校博士学科点专项科研基金(20110205110014)
