Colloidal Surface Active Maghemite Nanoparticles for Biologically Safe CrVI Remediation: from Core-shell Nanostructures to Pilot Plant Development
Autor: | Fabio Vianello, Gabriella Salviulo, Giorgio Zoppellaro, Jiří Tuček, Paola Venier, Ondřej Malina, Petr Jakubec, Massimiliano Magro, Radek Zbořil, Davide Baratella, Stefania Domeneghetti, Václav Ranc, Emanuela Bonaiuto |
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Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
Environmental remediation
Groundwater remediation Maghemite chemistry.chemical_element Nanoparticle Remediation Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Catalysis Nanomaterials Chromium Colloid Chemistry Maghemite Nanoparticles Chromium CrVI Remediation Organic Chemistry General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering Covalent bond engineering Nanoparticles 0210 nano-technology Chromium CrVI |
Popis: | The present study is aimed at the exploration of achievable improvements for Cr(VI) ex situ and in situ water remediation by using novel naked colloidal maghemite (γ-Fe2 O3 ) nanoparticles (surface active maghemite nanoparticles, SAMNs). The reliability of SAMNs for Cr(VI) binding and removal was demonstrated, and SAMN@Cr(VI) complex was characterized, as well as the covalent nature of the absorption was unequivocally proved. SAMNs were structurally and magnetically well conserved after Cr(VI) binding. Thus, in consideration of their affinity for Cr(VI) , SAMNs were exploited in a biological model system, mimicking a real in situ application. The assay evidenced a progressive reduction of revertant colonies of Salmonella typhimurium TA100 strain, as maghemite nanoparticles concentration increased, till the complete suppression of Cr(VI) mutagen effect. Finally, an automatic modular pilot system for continuous magnetic removal and recovery of Cr(VI) from water is proposed. SAMNs, thanks to their colloidal, binding, and catalytic properties, represent a promising tool as a reliable nanomaterial for water remediation by Cr(VI) . |
Databáze: | OpenAIRE |
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