光磁耦合废水处理工艺条件的优化研究

Optimization study on magnetic field and photocatalysis coupling conditions for wastewater treatment

以Fe3O4/TiO2作为磁性光催化剂,采用光磁耦合技术处理模拟印染废水。利用统计学方法对光磁耦合废水处理的影响因素进行了探讨和分析,考察了磁场强度、磁性光催化剂投加量、pH值和光照时间对光磁耦合废水处理的影响。通过Design-Expert 7.0.0软件分析得到最佳工艺条件:磁场强度73.95 mT,磁性光催化剂投加量1.13 g/L,模拟废水pH值13,光照时间120 min。在最佳工艺条件下进行实验,脱色率为88.60%。

Based on the photocatalysis technology and magnetic field,the magnetic photo-catalyst Fe3O4/TiO2 was used to degrade the simulated wastewater. The effects of operating conditions on the magnetic field and photocatalysis coupling process of wastewater were investigated by using statistical methods. Response surface methodology was used to investigate the effects of magnetic density,magnetic photo-catalyst concentration,pH and illumination time on decolorization rate. Using the software of Design-Expert 7. 0. 0,optimum process conditions were obtained based on the experimental data. The optimum magnetic density,magnetic photo-catalyst concentration,pH and illumination time were 73. 95 mT,1. 13 g /L,13 and 120 min,respectively and the highest decolorization rate(88. 60%) could be achieved.