【摘要】 采用溶胶-凝胶法制备了磁性纳米铁酸钴（CoFe₂O₄）固体颗粒,并采用扫描电镜（SEM）,X射线衍射仪（XRD）,傅里叶变换红外光谱仪（FT-IR）和振动样品磁强计对样品进行表征分析.以磁性纳米Co Fe₂O₄颗粒活化过硫酸盐氧化去除水中四环素为探针反应,评价Co Fe₂O₄颗粒的活化性能.结果表明,600℃焙烧温度下制备出的固体颗粒,其活性较高,颗粒表面金属离子浸出率较低;优化温度下制备的Co Fe₂O₄颗粒在较宽的pH值范围（4.4～9.0）内均具有较高活性;控制实验条件PDS0 1g/L,CoFe₂O₄ 1g/L,TCH0 50mg/L,20℃,pH0 4.4,反应4h后TCH去除率达到82.0%.CoFe₂O₄颗粒循环重复利用10次后仍保持较高的活性和结构稳定性,而且因其特殊的磁性能便于回收利用.更多还原

【Abstract】 The magnetic nanoscale cobalt ferrite（CoFe₂O₄） solid particles were prepared by the sol-gel method. These samples were characterized by scanning electron microscope（SEM）, X-ray diffraction（XRD）, fourier transform infrared spectrometer（FT-IR） and vibrating sample magnetometer. The activity of Co Fe₂O₄ particles was evaluated with the removal experiments of tetracycline hydrochloride（TCH） in the activated persulfate oxidation system. The results showed that the particles calcined at 600℃ had the higher activity and lower metal ion leaching rate on the particle surface. The CoFe₂O₄ particles prepared at the optimized temperature had high activity in a wide pH range（4.4～9.0） in activated persulfate oxidation system. The TCH removal efficiency reached 82.0% after 4 hours of reaction with the experimental conditions of PDS₀ 1 g/L, CoFe₂O₄ 1 g/L, TCH₀ 50 mg/L, 20℃, pH₀ 4.4. These particles still maintained high activity and structural stability after 10 cycles of reuse, and could be easily recycled due to its special magnetic properties.更多还原