Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles
Human activities in modern life are contributing significantly to global environmental pollution. With the need for clean drinking water ever increasing, so does the need to find new water-cleaning technologies. The ability of nanoparticles (NPs) to remove persistent pollutants from aqueous solution...
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MDPI AG
2023-04-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/7/1415 |
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| author | Anthi S. Stefanarou Vasileios E. Katzourakis Fenglian Fu Anastasios A. Malandrakis Constantinos V. Chrysikopoulos |
| author_facet | Anthi S. Stefanarou Vasileios E. Katzourakis Fenglian Fu Anastasios A. Malandrakis Constantinos V. Chrysikopoulos |
| author_sort | Anthi S. Stefanarou |
| collection | DOAJ |
| description | Human activities in modern life are contributing significantly to global environmental pollution. With the need for clean drinking water ever increasing, so does the need to find new water-cleaning technologies. The ability of nanoparticles (NPs) to remove persistent pollutants from aqueous solutions makes them very important for use in water treatment technology. Titanium dioxide (TiO<sub>2</sub>) is recognized as an NP with unique optical, thermal, electrical, and magnetic properties and is widely used as an adsorbent material. Due to the extensive use of pesticides, their removal from the aquatic environment has gained widespread attention from the scientific community. In the present work, the transport of pesticide thiophanate methyl (TM), as well as the cotransport of TM and TiO<sub>2</sub> nanoparticles, in a water-saturated column packed with quartz sand under various water conditions were investigated. Several ionic strengths (1, 10, 50, and 100 mM) and pH values (3, 5, 7, and 10) were examined. The results from the transport experiments were fitted and analyzed with the use of the ColloidFit software, while the results from the cotransport experiments were fitted with a modified version of a recently developed mathematical cotransport model. The results of this study suggested that the lowest mass recovery rate was for the cotransport experiments with the addition of NaCl. Furthermore, it was shown that TM has a weak affinity for sand but a relatively strong affinity for TiO<sub>2</sub> at high ionic strength and acidic pH, probably accounting for the reduced mass recovery of TM in cotransport experiments. |
| first_indexed | 2024-03-09T10:58:50Z |
| format | Article |
| id | doaj.art-0a98a8b32cdc41fe95d221beb2e72af0 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T10:58:50Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-0a98a8b32cdc41fe95d221beb2e72af02023-12-01T01:26:36ZengMDPI AGWater2073-44412023-04-01157141510.3390/w15071415Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide NanoparticlesAnthi S. Stefanarou0Vasileios E. Katzourakis1Fenglian Fu2Anastasios A. Malandrakis3Constantinos V. Chrysikopoulos4School of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, GreeceSchool of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, GreeceSchool of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, GreeceSchool of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, GreeceHuman activities in modern life are contributing significantly to global environmental pollution. With the need for clean drinking water ever increasing, so does the need to find new water-cleaning technologies. The ability of nanoparticles (NPs) to remove persistent pollutants from aqueous solutions makes them very important for use in water treatment technology. Titanium dioxide (TiO<sub>2</sub>) is recognized as an NP with unique optical, thermal, electrical, and magnetic properties and is widely used as an adsorbent material. Due to the extensive use of pesticides, their removal from the aquatic environment has gained widespread attention from the scientific community. In the present work, the transport of pesticide thiophanate methyl (TM), as well as the cotransport of TM and TiO<sub>2</sub> nanoparticles, in a water-saturated column packed with quartz sand under various water conditions were investigated. Several ionic strengths (1, 10, 50, and 100 mM) and pH values (3, 5, 7, and 10) were examined. The results from the transport experiments were fitted and analyzed with the use of the ColloidFit software, while the results from the cotransport experiments were fitted with a modified version of a recently developed mathematical cotransport model. The results of this study suggested that the lowest mass recovery rate was for the cotransport experiments with the addition of NaCl. Furthermore, it was shown that TM has a weak affinity for sand but a relatively strong affinity for TiO<sub>2</sub> at high ionic strength and acidic pH, probably accounting for the reduced mass recovery of TM in cotransport experiments.https://www.mdpi.com/2073-4441/15/7/1415nanoparticlestitanium dioxidepesticidesthiophanate methylcotransportporous media |
| spellingShingle | Anthi S. Stefanarou Vasileios E. Katzourakis Fenglian Fu Anastasios A. Malandrakis Constantinos V. Chrysikopoulos Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles Water nanoparticles titanium dioxide pesticides thiophanate methyl cotransport porous media |
| title | Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles |
| title_full | Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles |
| title_fullStr | Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles |
| title_full_unstemmed | Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles |
| title_short | Transport of Thiophanate Methyl in Porous Media in the Presence of Titanium Dioxide Nanoparticles |
| title_sort | transport of thiophanate methyl in porous media in the presence of titanium dioxide nanoparticles |
| topic | nanoparticles titanium dioxide pesticides thiophanate methyl cotransport porous media |
| url | https://www.mdpi.com/2073-4441/15/7/1415 |
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