硫铁矿催化H2O2氧化深度处理造纸废水

Advanced Treatment of Papermaking Wastewater by Pyrite Catalyzing H2O2

摘要:

以造纸废水二级生化出水为处理对象，利用硫铁矿催化H2O2降解废水中生物难降解有机物.在最佳工艺条件下：废水初始pH值为4、矿物投加量为1 g·L-1、H2O2投加量为50 mg·L-1、反应时间为1 h，使废水的化学需氧量（COD）从初始136.0 mg·L-1降低到44.8 mg·L-1.结果表明：硫铁矿具有较高的催化活性，能提高H2O2的利用效率，并且可重复利用.

Abstract:

Effluent from secondary biological process for papermaking wastewater was employed as the model pollutants. Under the optimum conditions of the initial pH: 4, pyrite adding dosage: 1 g·L-1, H2O2 adding dosage: 50.0 mg·L-1, and the oxidation reaction time: 1 h, chemical oxygen demand (COD) of wastewater can decrease from 136.0 mg·L-1 to 44.8 mg·L-1. The pyrite is found to be active to promote Fenton like reaction with low cost due to high utilization efficiency of H2O2, furthermore, catalyst can be easily recovered from wastewater and reused.