混合滤料的润湿性及其过滤处理含油废水性能

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Abstract To investigate the coupling effect of two special wettability filter media with opposite wettability, the superhydrophobic and superhydrophilic quartz sand filter medium and the superhydrophilic and underwater superhydrophobic quartz sand filter medium were mixed, and the wettability and filtration performance for oil removal of the mixed filter media were studied. The results showed that the wettability of the solid surface composed of the two kinds of filter media did not satisfy the weighted average relationship with the wettability of each filter medium. It was more consistent with the relation of conic curve, and the determination coefficient is as high as 0.9992. The oil removal efficiency of filtration was coupled with the alternate wettability. The more hydrophobic and lipophilic the mixed filter media was, the greater the oil removal efficiency, normalized adhesion efficiency and permeability coefficient were, and vice versa. The smaller the particle size of filter material was, the greater the slope of the normalized adhesion efficiency was, while the effect of filter speed and bed depth on the slope of the normalized adhesion efficiency was not noticeable. The hydrophobicity of the filter material has the effect of increasing resistance; the increase of the filter rate increased the permeability coefficient of the filter layer. This work demonstrated the filtration of mixed filter media for oil removal and provided a new idea for filtration treatment of oily wastewater.

Key words： filtration oily wastewater wettability permeability coefficient quartz sand filter media superhydrophobic superhydrophilic

Received: 12 October 2021

PACS:

X703.5

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	Articles by authors
	MAN Shi-de
	QI Jun-ye
	CHE Ying-long
	WEI Bi-gui

Cite this article:

MAN Shi-de,QI Jun-ye,CHE Ying-long等. Wettability of mixed filter media and its performance in filtering and treating oily wastewater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(5): 2105-2111.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I5/2105

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