Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates
Urban wastes are a potential source of environment contamination, especially when they are not properly disposed. Nowadays, researchers are finding innovative solutions for recycling and reusing wastes in order to favour a sustainable development from the viewpoint of circular economy. In this conte...
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MDPI AG
2019-01-01
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Online Access: | https://www.mdpi.com/2079-4991/9/2/162 |
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author | Maria Laura Tummino Maria Luisa Testa Mery Malandrino Roberta Gamberini Alessandra Bianco Prevot Giuliana Magnacca Enzo Laurenti |
author_facet | Maria Laura Tummino Maria Luisa Testa Mery Malandrino Roberta Gamberini Alessandra Bianco Prevot Giuliana Magnacca Enzo Laurenti |
author_sort | Maria Laura Tummino |
collection | DOAJ |
description | Urban wastes are a potential source of environment contamination, especially when they are not properly disposed. Nowadays, researchers are finding innovative solutions for recycling and reusing wastes in order to favour a sustainable development from the viewpoint of circular economy. In this context, the lignin-like fraction of biomass derived from Green Compost is a cost-effective source of soluble Bio-Based Substances (BBS-GC), namely complex macromolecules/supramolecular aggregates characterized by adsorbing and photosensitizing properties. In this work BBS-GC were immobilized on a silica support (SBA-15) and the chemico-physical properties of the resulting hybrid material (BBS-SBA) were analysed by zeta-potential measurements, nitrogen adsorption at 77K and micro-calorimetric techniques. Successively, the BBS-SBA photosensitizing and adsorption abilities were tested. Adsorption in the dark of Rhodamine B and Orange II on BBS-SBA and their degradation upon irradiation under simulated solar light were shown, together with the formation of hydroxyl radicals detected by Electron Paramagnetic Resonance spectroscopy. Furthermore, the adsorption of six inorganic ions (Al, Ni, Mn, As, Hg, Cr) on BBS-SBA was studied in pure water at two different pH values and in a landfill leachate, showing the good potential of this kind of materials in the removal of wastewater contaminants. |
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issn | 2079-4991 |
language | English |
last_indexed | 2024-04-13T00:35:22Z |
publishDate | 2019-01-01 |
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spelling | doaj.art-3c1ba7b82cf648d880694286bc0255b82022-12-22T03:10:20ZengMDPI AGNanomaterials2079-49912019-01-019216210.3390/nano9020162nano9020162Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic SubstratesMaria Laura Tummino0Maria Luisa Testa1Mery Malandrino2Roberta Gamberini3Alessandra Bianco Prevot4Giuliana Magnacca5Enzo Laurenti6Dipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, ItalyIstituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, via U. La Malfa 153, I-90146 Palermo, ItalyDipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, ItalyAcea Pinerolese Industriale S.p.A., Via Vigone 42, I-10064 Pinerolo (TO), ItalyDipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, ItalyDipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, ItalyDipartimento di Chimica, Università di Torino, via P. Giuria 7, I-10125 Torino, ItalyUrban wastes are a potential source of environment contamination, especially when they are not properly disposed. Nowadays, researchers are finding innovative solutions for recycling and reusing wastes in order to favour a sustainable development from the viewpoint of circular economy. In this context, the lignin-like fraction of biomass derived from Green Compost is a cost-effective source of soluble Bio-Based Substances (BBS-GC), namely complex macromolecules/supramolecular aggregates characterized by adsorbing and photosensitizing properties. In this work BBS-GC were immobilized on a silica support (SBA-15) and the chemico-physical properties of the resulting hybrid material (BBS-SBA) were analysed by zeta-potential measurements, nitrogen adsorption at 77K and micro-calorimetric techniques. Successively, the BBS-SBA photosensitizing and adsorption abilities were tested. Adsorption in the dark of Rhodamine B and Orange II on BBS-SBA and their degradation upon irradiation under simulated solar light were shown, together with the formation of hydroxyl radicals detected by Electron Paramagnetic Resonance spectroscopy. Furthermore, the adsorption of six inorganic ions (Al, Ni, Mn, As, Hg, Cr) on BBS-SBA was studied in pure water at two different pH values and in a landfill leachate, showing the good potential of this kind of materials in the removal of wastewater contaminants.https://www.mdpi.com/2079-4991/9/2/162orangerhodamineadsorptionphotocatalysishybrid silicawastewater treatmentwaste-derived substances |
spellingShingle | Maria Laura Tummino Maria Luisa Testa Mery Malandrino Roberta Gamberini Alessandra Bianco Prevot Giuliana Magnacca Enzo Laurenti Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates Nanomaterials orange rhodamine adsorption photocatalysis hybrid silica wastewater treatment waste-derived substances |
title | Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates |
title_full | Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates |
title_fullStr | Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates |
title_full_unstemmed | Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates |
title_short | Green Waste-Derived Substances Immobilized on SBA-15 Silica: Surface Properties, Adsorbing and Photosensitizing Activities towards Organic and Inorganic Substrates |
title_sort | green waste derived substances immobilized on sba 15 silica surface properties adsorbing and photosensitizing activities towards organic and inorganic substrates |
topic | orange rhodamine adsorption photocatalysis hybrid silica wastewater treatment waste-derived substances |
url | https://www.mdpi.com/2079-4991/9/2/162 |
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