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
Treatment of a Trichloroethylene Source Zone using Persulfate Activated by an Emplaced Nano-Pd–Fe0 Zone
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Transport characteristics of nanoscale zero-valent iron carried by three different “vehicles” in porous media
TL;DR: SDS solution and SDS foam were better vehicles than water for delivering nZVI particles to porous media for contamination remediation and the mobility of nZ VI in finer sand was significantly enhanced by foam, compared with that in coarse sand.
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Environmental Remediation of Chlorinated Hydrocarbons Using Biopolymer Stabilized Iron Loaded Halloysite Nanotubes
TL;DR: In this paper, a novel technology is described that uses earth-abundant natural tubular aluminosilicate clays known as halloysite (HNT) to support nanoscale zerovalent iron (NZVI) to reduce TCE to relatively innocuous products such as ethane and ethylene.
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Chemical Reduction of Hexavalent Chromium and Its Immobilisation Under Batch Conditions Using a Slurry Reactor
TL;DR: In this paper, chemical reduction of the hexavalent chromium, Cr(VI), present in contaminated soil and groundwater was carried out in a slurry reactor under dynamic conditions (120rpm and 25°C) using different reductants [ferrous sulphate (Fe(II))], sodium bisulphite, sucrose, ascorbic acid and zerovalent iron (ZVI)] in order to evaluate the influence of the reductant on the redox process.
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