Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment
Although membrane separation technology has been widely used in the treatment of oily wastewater, the complexity and high cost of the membrane preparation, as well as its poor stability, limit its further development. In this study, via the vacuum-assisted suction filtration method, polydopamine (PD...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/23/7903 |
| _version_ | 1797399809369309184 |
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| author | Chang-Hua Zhao Yu-Ping Zhang Li Wan Xin-Xin Chen Pei Yuan Ling-Bo Qu |
| author_facet | Chang-Hua Zhao Yu-Ping Zhang Li Wan Xin-Xin Chen Pei Yuan Ling-Bo Qu |
| author_sort | Chang-Hua Zhao |
| collection | DOAJ |
| description | Although membrane separation technology has been widely used in the treatment of oily wastewater, the complexity and high cost of the membrane preparation, as well as its poor stability, limit its further development. In this study, via the vacuum-assisted suction filtration method, polydopamine (PDA)-coated TiO<sub>2</sub> nanoparticles were tightly attached and embedded on both sides of laboratory filter paper (FP). The resultant FP possessed the typical wettability of high hydrophilicity in the air with the water contact angle (WCA) of 28°, superoleophilicity with the oil contact angle (OCA) close to 0°, underwater superoleophobicity with the underwater OCA greater than 150°, and superhydrophobicity under the water with the underoil WCA over 150° for five kinds of organic solvents (carbon tetrachloride, toluene, n-hexane, n-octane, and iso-octane). The separation efficiency of immiscible oil/water, oil-in-water, and water-in-oil emulsions using the modified FP is higher than 99%. After 17 cycles of emulsion separation, a high separation efficiency of 99% was still maintained for the FP, along with good chemical and mechanical stability. In addition, successful separation and purification were also realized for the oil-in-water emulsion that contained the methylene blue (MB) dye, along with the complete degradation of MB in an aqueous solution under UV irradiation. |
| first_indexed | 2024-03-09T01:46:29Z |
| format | Article |
| id | doaj.art-f1a593926c254fbfb95773f57efb6658 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T01:46:29Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-f1a593926c254fbfb95773f57efb66582023-12-08T15:22:41ZengMDPI AGMolecules1420-30492023-12-012823790310.3390/molecules28237903Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater TreatmentChang-Hua Zhao0Yu-Ping Zhang1Li Wan2Xin-Xin Chen3Pei Yuan4Ling-Bo Qu5College of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, ChinaCollege of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, ChinaCollege of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, ChinaCollege of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, ChinaCollege of Chemistry, Zhengzhou University, Zhengzhou 450001, ChinaAlthough membrane separation technology has been widely used in the treatment of oily wastewater, the complexity and high cost of the membrane preparation, as well as its poor stability, limit its further development. In this study, via the vacuum-assisted suction filtration method, polydopamine (PDA)-coated TiO<sub>2</sub> nanoparticles were tightly attached and embedded on both sides of laboratory filter paper (FP). The resultant FP possessed the typical wettability of high hydrophilicity in the air with the water contact angle (WCA) of 28°, superoleophilicity with the oil contact angle (OCA) close to 0°, underwater superoleophobicity with the underwater OCA greater than 150°, and superhydrophobicity under the water with the underoil WCA over 150° for five kinds of organic solvents (carbon tetrachloride, toluene, n-hexane, n-octane, and iso-octane). The separation efficiency of immiscible oil/water, oil-in-water, and water-in-oil emulsions using the modified FP is higher than 99%. After 17 cycles of emulsion separation, a high separation efficiency of 99% was still maintained for the FP, along with good chemical and mechanical stability. In addition, successful separation and purification were also realized for the oil-in-water emulsion that contained the methylene blue (MB) dye, along with the complete degradation of MB in an aqueous solution under UV irradiation.https://www.mdpi.com/1420-3049/28/23/7903TiO<sub>2</sub>@PDAfilter paperoil/water separationemulsion separationpurification |
| spellingShingle | Chang-Hua Zhao Yu-Ping Zhang Li Wan Xin-Xin Chen Pei Yuan Ling-Bo Qu Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment Molecules TiO<sub>2</sub>@PDA filter paper oil/water separation emulsion separation purification |
| title | Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment |
| title_full | Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment |
| title_fullStr | Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment |
| title_full_unstemmed | Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment |
| title_short | Versatile Application of TiO<sub>2</sub>@PDA Modified Filter Paper for Oily Wastewater Treatment |
| title_sort | versatile application of tio sub 2 sub pda modified filter paper for oily wastewater treatment |
| topic | TiO<sub>2</sub>@PDA filter paper oil/water separation emulsion separation purification |
| url | https://www.mdpi.com/1420-3049/28/23/7903 |
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