摘要：

为寻求有效降解钻井污水COD_Cr的新方法,探讨了超声波及超声波和纳米TiO₂联合降解钻井污水CODCr的效果,研究了各种因素对超声波催化降解钻井污水中COD_Cr的影响。在纳米锐钛型TiO₂的作用下,二氧化钛超声波催化降解钻井污水的COD_Cr效果明显优于单纯使用超声波的降解。在超声波频率20kHz,输出功率为50W,TiO₂催化剂投加质量浓度为0.5～1.0g/L,pH为3.0,温度为30℃,钻井污水的COD_Cr初始浓度1881.04mg/L的条件下,80min超声波催化处理后的COD_Cr降解率<99.1%。

关键词: 钻井污水, 超声波, 纳米锐钛型TiO₂

Abstract:

In order to find a new way to degrade the COD_Cr of drilling effluent effectively, the effects of ultrasound and combination of ultrasound and nano-TiO₂ photocatalyst, and the various influential factors on the degradation of COD_Cr of drilling effluent have been studied.The researched results indicate that the effects of ultrasonic degradation are more obvious in the presence of nano-anatase TiO₂ than in the absence of any TiO₂.The degradation ratio of COD_Cr of drilling effluent surpasses 99.1% after 80 min under the experimental conditions,such as ultrasonic frequency of 20 kHz, output power of 50 W, the amount of TiO₂ catalyst 0.5～1 g/L,pH3.0,and temperature of 30 ℃, when the initial drilling effluent concentrationof1 881.04 mg/L.

Key words: drilling effluent, ultrasonics, nano-anatase TiO₂

中图分类号: 

• O611.4

• X741