镀铜磁性粒子强化内电解预处理对硝基苯酚废水

ENHANCEMENT OF INTERIOR ELECTROLYSIS PRETREATMENT OF P-NITROPHENOL WASTEWATER BY COPPER-COATED MAGNETIC PARTICLES

采用化学共沉淀法与化学镀相结合制备了镀铜磁性粒子,并用SEM、XRD和磁强计对其进行了表征。采用铁屑/镀铜磁性粒子内电解法,以对硝基苯酚为目标污染物,考察了铁屑与镀铜磁性粒子质量比、磁场强度、初始pH、曝气量和Na2SO4投加量对COD去除率的影响。研究结果表明,在铁屑与镀铜磁性粒子质量比为10,磁场强度为0.04T,初始pH为4,曝气量为15L·min-1和Na2SO4投加量为2000mg·L-1的最优条件下,当处理时间控制在3.5h时,COD去除率达到72%,为对硝基苯酚废水的后续处理提供了有利条件。

The copper-coated magnetic particles were prepared by the combination of a chemical co-precipitation method with an electroless plating method and characterized by scanning electron microscope,X ray diffraction and magnetization measurements.Iron scraps/copper-coated magnetic particles system was employed for treating the p-nitrophenol wastewater.The effects of quality rate of iron scraps and copper-coated magnetic particles,magnetic intensity,initial pH,aeration rate,and Na2SO4 dose on COD removal efficiency have been studied systematically.The results of experiments indicated that the removal efficiency of COD could reach as high as 72%,with quality rate of iron scraps and copper-coated magnetic particles is 10,magnetic intensity is 0.04 T,initial pH is 4,aeration rate is 15 L·min^-1,and Na2SO4 dosage is 2 000 mg·L^-1,and reaction time is 3.5 h.This provides helpful conditions for the next procedure relatively.