Abstract: The research on the acidulation-Fenton oxidation process used for treating shale gas produced water has been accomplished. The influences of various factors on treatment effects have been investigated by orthogonal tests. The results show that the optimum experimental conditions of acidulation-Fenton process are as follows:pH=2, m(H₂O₂):m(COD_Cr)=6,n(H₂O₂):n(Fe²⁺)=6,and reaction time of 120 min. Under the optimum conditions,the remov-ing rates of suspended solids and COD_Cr reach 97% and 83.8%,respectively. The organic matter in wastewater exists mainly in form of small apparent molecule mass organic matter. The acidulation-Fenton method mainly decreases the organic matter in the interval of small apparent molecular masses.

Key words: shale gas produced water, acidulation, Fenton

摘要： 进行了酸析-Fenton法联用降解处理页岩气田采出水的研究。利用正交实验考察了各因素对采出水处理效果的影响，并分析不同表观分子质量COD_Cr和UV₂₅₄的去除效果。结果表明，在酸析-Fenton法最佳实验条件下，即pH=2，m（H₂O₂）∶m（COD_Cr）=6，n（H₂O₂）∶n（Fe²⁺）=6，反应时间120 min，悬浮物、COD_Cr去除率分别达到97%、83.8%；原水中有机物主要以小表观分子质量有机物形式存在，酸析-Fenton法重点降低小表观分子质量区间的有机物。

关键词: 页岩气田采出水, 酸析, Fenton

CLC Number: 

• X703.1