Journal
NANOMATERIALS
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano9020162
Keywords
orange; rhodamine; adsorption; photocatalysis; hybrid silica; wastewater treatment; waste-derived substances
Categories
Funding
- Marie Sklodowska-Curie Research and Innovation Staff Exchange project - European Commission H2020-MSCA-RISE-2014 [645551]
- Compagnia di San Paolo
- University of Torino [2014_L2_126]
- Bando Talenti della Societa Civile - edizione 2016
- Fondazione CRT (Italy)
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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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