Journal ArticleDOI
Impact of Fe and Ag nanoparticles on seed germination and differences in bioavailability during exposure in aqueous suspension and soil
Yehia S. El-Temsah,Erik J. Joner +1 more
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It is indicated that zero‐valent iron nanoparticles at low concentrations can be used without detrimental effects on plants and thus be suitable for combined remediation where plants are involved and Thus, seed germination tests seem less suited for estimation of environmental impact of Ag.Abstract:
The potential environmental toxicity of zero-valent iron nanoparticles (nZVI) and three types of nanosilver differing in average particle size from 1 to 20 nm was evaluated using seed germination tests with ryegrass, barley, and flax exposed to 0-5000 mg L(-1) nZVI or 0-100 mg L(-1) Ag. For nZVI, germination tests were conducted both in water and in two contrasting soils to test the impact of assumed differences in bioavailability of nanoparticles. Inhibitory effects were observed in aqueous suspensions at 250 mg L(-1) for nZVI and 10 mg L(-1) for Ag. Reduction in shoot growth was a more sensitive endpoint than germination percentage. Complete inhibition of germination was observed at 1000-2000 mg L(-1) for nZVI. For Ag, complete inhibition was not achieved. The presence of soil had a modest influence on toxicity, and inhibitory effects were observed at 300 mg nZVI L(-1) water in soil (equivalent to 1000 mg nZVI kg(-1) soil). Complete inhibition was observed at 750 and 1500 mg L(-1) in sandy soil for flax and ryegrass, respectively, while for barley 13% germination still occurred at 1500 mg L(-1) . In clay soil, inhibition was less pronounced. Our results indicate that nZVI at low concentrations can be used without detrimental effects on plants and thus be suitable for combined remediation where plants are involved. Silver nanoparticles inhibited seed germination at lower concentrations, but showed no clear size-dependent effects, and never completely impeded germination. Thus, seed germination tests seem less suited for estimation of environmental impact ofread more
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Interaction of nanoparticles with edible plants and their possible implications in the food chain
Cyren M. Rico,Sanghamitra Majumdar,Maria Duarte-Gardea,Jose R. Peralta-Videa,Jorge L. Gardea-Torresdey +4 more
TL;DR: The uptake, bioaccumulation, biotransformation, and risks of nanomaterials (NMs) for food crops are still not well understood and the possible biomagnification of NPs in the food chain is unknown.
Journal ArticleDOI
Magnetic nanoparticles: essential factors for sustainable environmental applications.
Samuel C.N. Tang,Irene M.C. Lo +1 more
TL;DR: This review aims to provide a holistic overview of current knowledge of magnetic nanoparticles in environmental applications, emphasizing studies of zero-valent iron (nZVI), magnetite (Fe3O4) and maghemite (γ-Fe2O3) nanoparticles.
Journal ArticleDOI
Nanotechnology: The new perspective in precision agriculture.
TL;DR: Precision farming is measuring and responding to inter and intra-field variability in crops to form a decision support system for crop commodities.
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Review on nano zerovalent iron (nZVI): From synthesis to environmental applications
TL;DR: In this paper, the authors present the opportunities and risks arising from the use of nano zerovalent iron (nZVI) from its synthesis to environmental application, and identify problems that may occur a result of changes in the physicochemical properties of nZVI due to their modification (e.g. other metal doping, coating the surface, or deposition on the support).
Journal ArticleDOI
An overview on manufactured nanoparticles in plants: Uptake, translocation, accumulation and phytotoxicity
Durgesh Kumar Tripathi,Shweta,Shweta Singh,Swati Singh,Rishikesh Pandey,Vijay Pratap Singh,Nilesh C. Sharma,Sheo Mohan Prasad,Nawal Kishore Dubey,Devendra Kumar Chauhan +9 more
TL;DR: The present review summarizes uptake, translocation and accumulation of nanomaterials and their recognized ways of phytotoxicity on morpho-anatomical, physiological, biochemical and molecular traits of plants and examines the intrinsic detoxification mechanisms in plants in light ofnanomaterial accumulation within plant cells or parts.
References
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The bactericidal effect of silver nanoparticles
Jose Ruben Morones,Jose Luis Elechiguerra,A. Camacho,Katherine B. Holt,Juan B. Kouri,Jose Tapia Ramirez,Miguel Jose Yacaman +6 more
TL;DR: The results indicate that the bactericidal properties of the nanoparticles are size dependent, since the only nanoparticles that present a direct interaction with the bacteria preferentially have a diameter of approximately 1-10 nm.
Journal ArticleDOI
Nanomaterials in the environment: Behavior, fate, bioavailability, and effects
Stephen J. Klaine,Pedro J. J. Alvarez,Graeme E. Batley,Teresa F. Fernandes,Richard D. Handy,Delina Y. Lyon,Shaily Mahendra,Mike J. McLaughlin,Jamie R. Lead +8 more
TL;DR: This review critiques existing nanomaterial research in freshwater, marine, and soil environments and illustrates the paucity of existing research and demonstrates the need for additional research.
Journal ArticleDOI
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Bernd Nowack,Thomas D. Bucheli +1 more
TL;DR: This review presents an overview of the classes of NP relevant to the environment and summarizes their formation, emission, occurrence and fate in the environment.
Journal ArticleDOI
Nanoscale Iron Particles for Environmental Remediation: An Overview
TL;DR: Nanoscale iron particles represent a new generation of environmental remediation technologies that could provide cost-effective solutions to some of the most challenging environmental cleanup problems as mentioned in this paper, and they provide enormous flexibility for in situ applications.
Journal ArticleDOI
Size-Dependent Cytotoxicity of Gold Nanoparticles
Yu Pan,Sabine Neuss,Annika Leifert,Monika Fischler,Fei Wen,Ulrich Simon,Günter Schmid,Wolfgang Brandau,Willi Jahnen-Dechent +8 more
TL;DR: A systematic study of water-soluble gold nanoparticles stabilized by triphenylphosphine derivatives ranging in size from 0.8 to 15 nm is made and the cytotoxicity of these particles in four cell lines representing major functional cell types with barrier and phagocyte function are tested.
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