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Colloidal Surface Active Maghemite Nanoparticles for Biologically Safe Cr VI Remediation: from Core‐Shell Nanostructures to Pilot Plant Development
Author(s) -
Magro Massimiliano,
Domeneghetti Stefania,
Baratella Davide,
Jakubec Petr,
Salviulo Gabriella,
Bonaiuto Emanuela,
Venier Paola,
Malina Ondřej,
Tuček Jiří,
Ranc Václav,
Zoppellaro Giorgio,
Zbořil Radek,
Vianello Fabio
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201600544
Subject(s) - maghemite , nanoparticle , nanomaterials , environmental remediation , chemistry , colloid , nanotechnology , zerovalent iron , nuclear chemistry , chemical engineering , adsorption , materials science , contamination , organic chemistry , ecology , engineering , biology
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‐Fe 2 O 3 ) 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 .