Fe基类Fenton催化剂非均相处理造纸废水

Fe-derived Fenton-like Catalyst for Non-homogeneous Treatment of Papermaking Wastewater

关键词:  高温烧结  类Fenton催化剂  造纸废水  非均相Fenton

Key Words:high-temperature sintering  Fenton-like catalyst  papermaking wastewater  non-homogeneous Fenton

摘要:针对传统均相Fenton法深度处理造纸废水中铁泥量大、成本较高等问题，将Fe₂O₃、Al₂O₃、SiO₂、石墨粉采用高温烧结的方式，制备Fe基类Fenton催化剂，并用于非均相Fenton处理造纸废水，可达到节省FeSO₄用量的效果。结果表明，经高温烧结制备的Fe基类Fenton催化剂具有丰富的孔隙结构，在pH值为3、催化剂投加量15 g/L、COD_Cr和H₂O₂质量比1∶0.75、反应时间90 min的条件下，造纸废水COD_Cr去除率为74.8%，且经过10次循环实验仍达70%以上，BOD₅去除率可达67%以上。

Abstract:To solve the problems of large amount of iron sludge and high cost in the traditional homogeneous Fenton method for the deep treatment of papermaking wastewater， Fe-derived Fenton catalysts were prepared by high temperature sintering of Fe₂O₃， Al₂O₃， SiO₂， and graphite powder， which was used in the non-homogeneous Fenton treatment of papermaking wastewater to achieve the effect of saving the dosage of FeSO₄. The results showed that the Fe-derived Fenton-like catalyst prepared by high-temperature sintering had a rich pore structure. Under the conditions that pH value of 3， catalyst dosage of 15 g/L， mass ratio of COD_Cr and H₂O₂ of 1∶0.75， and reaction time of 90 min， the removal rate of COD_Cr was up to 74.8% and more than 70% even after 10 cycles of experiments. The removal rate of BOD₅ could be more than 67%.