文献类型：期刊文献

英文题名：Washing Performance of Microbubbles on Porous Media

作者：Yuan, Fang[1]; Zhao, Xue[1]; Wu, Zhenhu[1]; Ding, Yanliang[1]; Yang, Qiang[1,2]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] National Engineering Laboratory for Industrial Wastewater Treatment, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230199360)

语种：英文

外文关键词：Efficiency - Gas chromatography - Gasoline - Hydrocarbons - Porous materials - Scanning electron microscopy - Ultrasonic applications - Ultrasonic waves - Viscosity - Wastewater treatment - Water pollution

摘要：The backwashing effect of filter materials in oilfield wastewater treatment processes is essential for the efficient long-cycle operation of equipment and the reduction of hazardous waste. Recently, there has been growing interest in microbubble cleaning technology due to its exceptional cleaning efficiency for porous particles. However, the mechanism of microbubble-pore interaction and its corresponding cleaning effects remain unclear. In this study, the performance of clear water, ultrasonic waves, and microbubbles in cleaning walnut shells contaminated with petroleum hydrocarbon materials was investigated. Microbubble cleaning was the most efficient in removing low-viscosity petroleum hydrocarbons, followed by ultrasonic waves, both of which showed significantly higher efficacy compared to traditional water washing. When treating petroleum hydrocarbon pollutants with high viscosity, microbubble cleaning was more effective than clear water but slightly less effective than the ultrasonic wave method. Therefore, a combination of ultrasonic waves and microbubble cleaning is recommended for heavy petroleum hydrocarbon-contaminated walnut shell filter material. Finally, based on gas chromatography-mass spectrometry (GC/MS) and scanning electron microscopy (SEM) analysis, the mechanism of how microbubbles collide with pores and clean the pollutants was revealed. ? 2023, The Authors. All rights reserved.