铁泥基催化剂非均相Fenton深度处理造纸废水

Advanced Treatment of Papermaking Wastewater by Heterogeneous Fenton Process with Iron Sludge-based Catalyst

关键词:  Fenton处理  污泥  铁泥基催化剂  非均相Fenton  造纸废水

Key Words:Fenton treatment  sludge  iron sludge-based catalyst  heterogeneous Fenton  papermaking wastewater

摘要:以Fenton氧化处理造纸废水产生的污泥为原料，复配粉煤灰、煤泥、羧甲基纤维素钠，采用高温热解的方法制备铁泥基催化剂。以废纸造纸二沉池出水为目标污染物，并以COD_Cr去除率和色度去除率作为评价指标，研究了非均相Fenton深度处理过程中铁泥基催化剂对废水的处理效果。结果表明，铁泥基催化剂的比表面积为230 m²/g；当反应体系初始pH值为2.5、催化剂投加量15 g/L、m(COD_Cr)∶m(H₂O₂)=1∶1.5、反应时间100 min时，COD_Cr去除率为66.7%，色度去除率高于80%，污泥产量比均相Fenton降低了91%~94%。

Abstract:Iron sludge-based catalysts were prepared via high temperature pyrolysis， with sludge from papermaking wastewater treated by Fenton oxidation as raw material， and compounded with fly ash， coal sludge and sodium carboxymethyl cellulose. The effects of iron sludge-based catalyst on the treatment of wastewater during heterogeneous Fenton advanced treatment were studied with effluent of secondary sedimentation tank of waste papermaking as the target pollutant， and COD_Cr removal rate and color removal rate as the evaluation indexes. The results showed that the specific surface area of iron sludge-based catalyst was 230 m²/g. When the initial pH value of the reaction system was 2.5， the dosage of catalyst was 15 g/L， m（COD_Cr）∶m（H₂O₂） was 1∶1.5， and the reaction time was 100 min， the removal rate of COD_Cr was 66.7%， the removal rate of color was higher than 80%， and the sludge yield was 91%~94% lower than that of homogeneous Fenton.