Continuous and efficient oil/water separation by special wettability granular filter media

IF 2.3 Q2 Environmental Science Journal of Water Reuse and Desalination Pub Date : 2022-06-01 DOI:10.2166/wrd.2022.102
Zhang Hongwei, Qi Junye, Che Yinglong, Man Shide, Liu Jianlin, Wei Bigui
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Abstract

To improve the separation efficiency of the oil/water mixture and simplify the separation process, a superhydrophilic/underwater superoleophobic quartz sand filter media (PR@QS) was prepared by coating potato residue onto the quartz sand surface, and an oil/water mixture separator containing two horizontally placed filter columns and one inlet chamber was proposed. One filter column was filled with the PR@QS, and the other column was filled with the superhydrophobic/superoleophilic quartz sand filter media. The experimental results showed that the separation efficiencies of five kinds of oil/water mixtures (petroleum ether, engine oil, diesel oil, cyclohexane, and methylene chloride) were up to 99.4%. Except for engine oil, the hydraulic conductivities of the other four oils and water are all greater than 3.5 m/h. When the filter layer is invaded by the lyophobic liquid, its filtration performance can be restored by backwashing. In summary, the separator can separate oil/water mixtures continuously and efficiently without filter contamination. Therefore, it has a broad prospect for practical application.

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采用特殊的润湿性颗粒过滤介质,实现连续高效的油水分离
为提高油水混合物的分离效率,简化分离过程,在石英砂表面涂覆马铃薯渣制备了超亲水/水下超疏油石英砂滤料(PR@QS),并设计了一种包含两个水平放置的过滤柱和一个进口室的油水混合物分离器。一个过滤柱内填充PR@QS,另一个过滤柱内填充超疏水/超亲油石英砂过滤介质。实验结果表明,5种油水混合物(石油醚、机油、柴油、环己烷、二氯甲烷)的分离效率可达99.4%。除机油外,其余四种油和水的水力导率均大于3.5 m/h。当滤层被疏水液体侵入时,可通过反冲洗恢复滤层的过滤性能。总之,分离器可以连续有效地分离油/水混合物,而不会污染过滤器。因此,具有广阔的实际应用前景。
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来源期刊
Journal of Water Reuse and Desalination
Journal of Water Reuse and Desalination ENGINEERING, ENVIRONMENTAL-WATER RESOURCES
CiteScore
4.30
自引率
0.00%
发文量
23
审稿时长
16 weeks
期刊介绍: Journal of Water Reuse and Desalination publishes refereed review articles, theoretical and experimental research papers, new findings and issues of unplanned and planned reuse. The journal welcomes contributions from developing and developed countries.
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