Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment
The aim of this work was to couple physical-chemical approaches with photocatalysis to reduce by a simple, inexpensive way the organic load of olive mill wastewater (OMW), mandatorily prior to the final discharge. Before irradiation, different sorbents were tested to remove part of the organic fract...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2016/8793841 |
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| author | Andrea Speltini Federica Maraschi Michela Sturini Valentina Caratto Maurizio Ferretti Antonella Profumo |
| author_facet | Andrea Speltini Federica Maraschi Michela Sturini Valentina Caratto Maurizio Ferretti Antonella Profumo |
| author_sort | Andrea Speltini |
| collection | DOAJ |
| description | The aim of this work was to couple physical-chemical approaches with photocatalysis to reduce by a simple, inexpensive way the organic load of olive mill wastewater (OMW), mandatorily prior to the final discharge. Before irradiation, different sorbents were tested to remove part of the organic fraction, monitored by measuring chemical oxygen demand (COD) and polyphenols (PP). Different low-cost, safe materials were tested, that is, Y zeolite (ZY), montmorillonite, and sepiolite. Considerable decrease of organic load was obtained, with the highest abatement (40%) provided by ZY (10 g L−1 in 1 : 10 OMW). Use of the three sorbents, in particular ZY, was convenient compared to commercial activated carbons. UV light photocatalytic tests, performed using P25 TiO2 on ZY-treated OMW, yielded quantitative remediation (ca. 90%). Also solar light provided significative results, PP being lowered by 74% and COD by 56%. Sol-gel anatase TiO2 and N-doped anatase TiO2 were also tested, obtaining good results, around -80% PP and -40% COD. Finally, an integrated approach was experimented by ZY-supported anatase TiO2 (TiO2@ZY). This photoreactive sorbent allowed one-pot treatment of OMW significative abatements of PP (-77%) and COD (-39%) with only 1 g L−1 material, under solar light. |
| format | Article |
| id | doaj-art-f596a083ff984755a1c9056e232e5400 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | International Journal of Photoenergy |
| spelling | doaj-art-f596a083ff984755a1c9056e232e54002025-02-03T01:10:33ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2016-01-01201610.1155/2016/87938418793841Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater TreatmentAndrea Speltini0Federica Maraschi1Michela Sturini2Valentina Caratto3Maurizio Ferretti4Antonella Profumo5Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyDepartment of Chemistry and Industrial Chemistry, University of Genoa, Via Dodecaneso 31, 16146 Genova, ItalyDepartment of Chemistry and Industrial Chemistry, University of Genoa, Via Dodecaneso 31, 16146 Genova, ItalyDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyThe aim of this work was to couple physical-chemical approaches with photocatalysis to reduce by a simple, inexpensive way the organic load of olive mill wastewater (OMW), mandatorily prior to the final discharge. Before irradiation, different sorbents were tested to remove part of the organic fraction, monitored by measuring chemical oxygen demand (COD) and polyphenols (PP). Different low-cost, safe materials were tested, that is, Y zeolite (ZY), montmorillonite, and sepiolite. Considerable decrease of organic load was obtained, with the highest abatement (40%) provided by ZY (10 g L−1 in 1 : 10 OMW). Use of the three sorbents, in particular ZY, was convenient compared to commercial activated carbons. UV light photocatalytic tests, performed using P25 TiO2 on ZY-treated OMW, yielded quantitative remediation (ca. 90%). Also solar light provided significative results, PP being lowered by 74% and COD by 56%. Sol-gel anatase TiO2 and N-doped anatase TiO2 were also tested, obtaining good results, around -80% PP and -40% COD. Finally, an integrated approach was experimented by ZY-supported anatase TiO2 (TiO2@ZY). This photoreactive sorbent allowed one-pot treatment of OMW significative abatements of PP (-77%) and COD (-39%) with only 1 g L−1 material, under solar light.http://dx.doi.org/10.1155/2016/8793841 |
| spellingShingle | Andrea Speltini Federica Maraschi Michela Sturini Valentina Caratto Maurizio Ferretti Antonella Profumo Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment International Journal of Photoenergy |
| title | Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment |
| title_full | Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment |
| title_fullStr | Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment |
| title_full_unstemmed | Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment |
| title_short | Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment |
| title_sort | sorbents coupled to solar light tio2 based photocatalysts for olive mill wastewater treatment |
| url | http://dx.doi.org/10.1155/2016/8793841 |
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