Citric acid modifies surface properties of commercial CeO2 nanoparticles reducing their toxicity and cerium uptake in radish (Raphanus sativus) seedlings

Effect of natural and synthetic surface coatings on the toxicity of multiwalled carbon nanotubes toward green algae

“…Wang et al [19] attributed the elevated toxicity of CuO nanoparticles to algae by Suwannee river fulvic acid to the combined effects of a lesser degree of aggregation, higher Cu 2+ release, and enhanced internalization of CuO nanoparticles. However, DOMs were also reported to reduce toxicities of nanoparticles, such as nanotoxicities of CeO 2 to plants [20], zerovalent iron to bacteria [21] and CeO 2 to algae [22]. Previous studies addressed that surface coatings by DOMs could exert hindrance to the direct contact between nanoparticles and cells [21,[23][24][25].…”

Effects of CeO2 nanoparticles on production and physicochemical characteristics of extracellular polymeric substances in biofilms in sequencing batch biofilm reactor

“…Cerium oxide nanoparticles (CeO 2 NPs) are widely applied in many commercial, industrial, and consumer products, such as polishing agents, personal care products, superconducting materials, fuel additives, and coating glass/ceramics (Trujillo-Reyes et al, 2013). Nevertheless, recent studies have shown that once CeO 2 NPs are released into the environment, they could be absorbed and generate toxicity in algae, activated sludge, and zebrafish, owing to interactions with microorganisms (Thill et al, 2006;Limbach et al, 2008;Johnston et al, 2010), and pose a potential threat to both the ecosystem and human health et al, 2006).…”

Response difference of transgenic and conventional rice (Oryza sativa) to nanoparticles (γFe2O3)

“…Previous work on non-GM plants reported negative, positive, and/or no effect of different NPs on seed germination, root elongation, and other plant growth performance indicators. ENPs can influence nutrient uptake (Larue et al 2012;Trujillo-Reyes et al 2013), bioavailability (Lee et al 2008;Marusenko et al 2013), biotransformation (Zhang et al 2012(Zhang et al , 2013, antioxidant enzyme activity (Cui et al 2014;Rico et al 2013), and other physiological biomarkers in conventional plants. Fe 2 O 3 NPs specifically have been shown to have key effects on plants.…”