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.

Green waste-derived substances immobilized on SBA-15 silica: Surface properties, adsorbing and photosensitizing activities towards organic and inorganic substrates

Tummino, Maria Laura;TESTA, MARIA LUISA;Malandrino, Mery;Gamberini, Roberta;Prevot, Alessandra Bianco;Magnacca, Giuliana;Laurenti, Enzo
2019-01-01

Abstract

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.
2019
9
2
162
174
https://www.mdpi.com/2079-4991/9/2/162/pdf
Adsorption; Hybrid silica; Orange; Photocatalysis; Rhodamine; Waste-derived substances; Wastewater treatment; Chemical Engineering (all); Materials Science (all)
Tummino, Maria Laura; Testa, Maria Luisa; Malandrino, Mery; Gamberini, Roberta; Prevot, Alessandra Bianco; Magnacca, Giuliana; Laurenti, Enzo*
File in questo prodotto:
File Dimensione Formato  
Tummino et al. - 2019 - Green Waste-Derived Substances Immobilized on SBA-15 Silica Surface Properties, Adsorbing and Photosensitizing A.pdf

Accesso aperto

Descrizione: File editoriale completo (pdf)
Tipo di file: PDF EDITORIALE
Dimensione 2.47 MB
Formato Adobe PDF
2.47 MB Adobe PDF Visualizza/Apri
2019_Nanomaterials with Suppl. Mat._Tummino et al..pdf

Accesso aperto

Descrizione: Nanomaterials with Suppl. Mat._2019_Tummino et al.
Tipo di file: PDF EDITORIALE
Dimensione 3.06 MB
Formato Adobe PDF
3.06 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1694405
Citazioni
  • ???jsp.display-item.citation.pmc??? 5
  • Scopus 18
  • ???jsp.display-item.citation.isi??? 15
social impact