Journal Article10.1021/CM0218108
Delivery Vehicles for Zerovalent Metal Nanoparticles in Soil and Groundwater
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TL;DR: Anionic, hydrophilic carbon and poly(acrylic acid)-supported (Fe/PAA) zerovalent iron nanoparticles were studied as a reactive material for the dehalogenation of chlorinated hydrocarbons in groundwater and soils as mentioned in this paper.
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Abstract: Anionic, hydrophilic carbon (Fe/C) and poly(acrylic acid)-supported (Fe/PAA) zerovalent iron nanoparticles were studied as a reactive material for the dehalogenation of chlorinated hydrocarbons in groundwater and soils The transport of Fe/C nanoparticles was studied by elution through columns packed with model soils from different regions of the USDA soil textural triangle, and was compared to that of unsupported Fe nanoparticles The Fe/C and Fe/PAA particles form colloidal suspensions that settle very slowly (hours to days) in water Their anionic surface charge facilitates transport through soil- and sand-packed columns Elution lengths from column breakthrough studies were compared with calculations based on the Tufenkji−Elimelech model (Environ Sci Technol 2004, 38, 529) It can be concluded from this comparison that nanoparticle diffusion is the dominant filtration mechanism, and that Fe/PAA and Fe/C particles have sticking coefficients on the order of 036 and ≤007, respectively, in sand and 0
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Citations
Pressure-controlled injection of guar gum stabilized microscale zerovalent iron for groundwater remediation.
Michela Luna,Francesca Gastone,Tiziana Anna Elisabetta Tosco,Rajandrea Sethi,Milica Velimirovic,Johan Gemoets,Rob Muyshondt,H. Sapion,Norbert Klaas,Leen Bastiaens +9 more
TL;DR: A flow regime at the threshold between permeation and preferential flow was selected, as a compromise between the desired homogeneous distribution of the mZVI around the injection point and the fast and effective injection of the slurry, resulting in the generation of preferential flow paths.
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Graphene oxide-supported nanoscale zero-valent iron composites for the removal of atrazine from aqueous solution
TL;DR: In this paper, a combination of atrazine adsorption by GO and reduction by nZVI on GO/nZVI composites was proposed as the mechanism for removing Atrazine.
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Magnetic properties of dendrimer-encapsulated iron nanoparticles containing an average of 55 and 147 atoms
Marc R. Knecht,Richard M. Crooks +1 more
TL;DR: In this article, the synthesis, characterization and magnetic properties of Fe nanoparticles containing an average of 55 and 147 atoms are described, and the nanoparticles are prepared using dendrimer templates and therefore they are nearly size-monodisperse.
Reduced transport potential of a palladium-doped zero valent iron nanoparticle in a water saturated loamy sand
TL;DR: The extent to which variation in groundwater chemistry, coupled with changes in aquifer geochemistry, could dramatically alter the transport potential of Pd-NZVI in the subsurface environment is emphasized.
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Comparative studies on montmorillonite-supported zero-valent iron nanoparticles produced by different methods: reactivity and stability
Hanzhong Jia,Chuanyi Wang +1 more
TL;DR: The results suggest that the great reactivity and high stability of montmorillonite-intercalated ZVI synthesized through heterogeneous nucleation process warrants its significant potential in developing in situ remediation and treatment technologies for organic contaminants.
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