摘要：

印染废水成分复杂,可生化降解性差。采用Fe-PbO₂/不锈钢为阳极,不锈钢为阴极,活性炭为颗粒电极,电催化氧化处理上海某印染厂废水。当pH为3,电流密度为0.028 A/cm²,硫酸铝浓度为0.16 mol/L,极板距离为6 cm,电解时间为10 min时COD_Cr去除率达到71.1%,BOD₅/COD_Cr由处理前的0.126上升为0.34,可生化降解性明显提高。Fe-PbO₂/不锈钢阳极和不锈钢阳极在印染废水中的循环伏安曲线表明镀PbO₂层的不锈钢电极具有较好的催化活性。

关键词: 印染废水, 电化学催化氧化, COD_Cr, BOD₅

Abstract:

The components of printing dyeing wastewater are complicated,and its biodegradability is poor.The wastewater in a Shanghai printing and dyeing plant has been treated with Fe-PbO₂/stainless steel as an anode,stainless steel as a cathode,and activated carbon as particle electrodes by electro-catalytic oxidation process.When its pH is 3,current density 0.028 A/cm²,aluminium sulfate solution concentration 0.16 mol/L,working electrode space 6 cm,and electrolysis time 10 min,the COD_Cr removing rate reaches 71.1%.The BOD₅/COD_Cr value increases from 0.126 before the treatment to 0.34,and the biodegradability increases remarkably.The cyclic voltage current curve of Fe-PbO₂/stainless steel anode and stainless steel anode in printing dyeing wastewater indicates that the stainless steel electrode electroplated with PbO₂ layer has better catalytic activity.

Key words: printing and dyeing wastewater, electrochemical catalytic oxidation, COD_Cr, BOD₅

中图分类号: 

• X791