1 research outputs found
Iron and Iron Oxide Nanoparticles Synthesized with Green Tea Extract: Differences in Ecotoxicological Profile and Ability To Degrade Malachite Green
Iron-based nanoparticles
(FeNPs) have been used successfully in
water treatment and environmental cleanup efforts. This study examined
ecotoxicity of two FeNPs produced with extract from green tea (smGT,
GTFe) and their ability to degrade malachite green (MG). Their physicochemical
properties were assessed by transmission electron microscopy, X-ray
powder diffraction, dynamic light scattering, and transmission Mössbauer
spectroscopy. Using a battery of ecotoxicological bioassays, we determined
the toxicity for nine different organisms, including bacteria, cyanobacteria,
algae, plants, and crustaceans. Iron and iron oxide nanoparticles
synthesized with green tea extract displayed low capacity to degrade
MG and were toxic to all tested organisms. Superparamagnetic iron
oxide nanoparticles (smGT) derived from GTFe showed no toxic effect
on most of the tested organisms up to a concentration of 1 g/L, except
for algae and cyanobacteria, and removed 93% MG at a concentration
of 125 mg of Fe/L after 60 min. The procedure described in this paper
generates new nontoxic superparamagnetic iron oxide NPs from existing
and toxic GTFe that are endowed with degradative potential for organic
compounds. These findings suggest low ecotoxicological risks and the
suitability of these green-synthesized FeNPs for environmental remediation
purposes