纳米SiO_2分散液表面改性玄武岩纤维载体的研究

Study on Surface Modification of Basalt Fibers Carrier by Nano Silica Dispersion

针对玄武岩纤维作为生物接触氧化载体材料的性能需求,采用乙酸乙酯纳米Si O_2分散液对其进行表面改性。通过扫描电镜、红外光谱分析、比表面积分析进行表征,以实际挂载的微生物膜量以及COD和NH_3—N去除率来评价改性的效果。改性结果表明:玄武岩纤维表面粗糙度增加,比表面积增加,含氧官能团增加;与未经过改性的玄武岩纤维相比,每克玄武岩纤维实际挂载的微生物膜量增加了21.39%;处理过程中平均每个时间段内COD以及NH_3—N去除效率分别提高了8.1%和6.2%。

In view of the property of basalt fibers as biological contact oxidation material, the basalt fibers were modified by ethyl acetate nano silica dispersion. The scanning electron microscopy, infrared spectros-copy analysis and specific surface area analysis results were carried out to characterize. The amount of actu-al mount microbial membrane and the removal efficiency of COD and NH3—N were used to evaluate the ef-fect of basalt fibers modification. The results indicated that when the basalt fibers were modified by nano sil-ica dispersion, the surface morphology of the fiber was rougher and the specific surface area as well as oxy-gen containing functional groups were increased. Meanwhile, the amount of actual mount microbial mem-brane per gram of basalt fiber was increased by 21.39% and the removal efficiency of COD and NH3—Nwere increased by 8.1% and 6.2% respectively in each time period.