title: Colloidal Surface Active Maghemite Nanoparticles for Biologically Safe Cr(VI) Remediation: from Core-Shell Nanostructures to Pilot Plant Development.
abstract: 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) .
authors.affiliation: Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, 35020, Italy.|Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Magro
authors.affiliation: Department of Biology, University of Padua, Padua, 35121, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Domeneghetti
authors.affiliation: Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, 35020, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Baratella
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Jakubec
authors.affiliation: Department of Geosciences, University of Padua, Padua, 35121, Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Salviulo
authors.affiliation: Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, 35020, Italy.
authors.forename: Emanuela
authors.initials: E
authors.lastname: Bonaiuto
authors.affiliation: Department of Biology, University of Padua, Padua, 35121, Italy.
authors.forename: Paola
authors.initials: P
authors.lastname: Venier
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Ondřej
authors.initials: O
authors.lastname: Malina
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Jiří
authors.initials: J
authors.lastname: Tuček
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Václav
authors.initials: V
authors.lastname: Ranc
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Zoppellaro
authors.affiliation: Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic. radek.zboril@upol.cz.
authors.forename: Radek
authors.initials: R
authors.lastname: Zbořil
authors.affiliation: Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, 35020, Italy. fabio.vianello@unipd.it.|Department of Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials, Palacky University in Olomouc, Olomouc, 779 00, Czech Republic. fabio.vianello@unipd.it.
authors.forename: Fabio
authors.identifier: http://orcid.org/0000-0002-4874-7205
authors.initials: F
authors.lastname: Vianello
keywords: chromium; maghemite nanoparticles; magnetic removal; salmonella typhimurium ta100; waste prevention