Nanoscale iron particles are sub-micrometer particles of iron metal. They are highly reactive because of their large surface area. In the presence of oxygen and water, they rapidly oxidize to form free iron ions. They are widely used in medical and laboratory applications and have also been studied for remediation of industrial sites contaminated with chlorinated organic compounds.
Research has shown that nanoscale iron particles can be effectively used to treat several forms of ground contamination, including grounds contaminated by polychlorinated biphenyls (PCBs), chlorinated organic solvents, and organochlorine pesticides. Nanoscale iron particle are easily transportable through ground water, allowing for in situ treatment. Additionally, the nanoparticle-water slurry can be injected into the contaminated area and stay there for long periods of time.[1] These factors combine to make this method cheaper than the most currently used alternative.
Researchers have found that although metallic iron nanoparticles remediate contaminants well, they tend to agglomerate on the soil surfaces. In response, carbon nanoparticles and water-soluble polyelectrolytes have been used as supports to the metallic iron nanoparticles. The hydrophobic contaminants adsorb to these supports, improving permeability in sand and soil.[1]
In field tests have generally confirmed lab findings. However, research is still ongoing and nanoscale iron particles are not yet commonly used for treating ground contamination.
iron, nanoparticle, nanoscale, iron, particles, micrometer, particles, iron, metal, they, highly, reactive, because, their, large, surface, area, presence, oxygen, water, they, rapidly, oxidize, form, free, iron, ions, they, widely, used, medical, laboratory, . Nanoscale iron particles are sub micrometer particles of iron metal They are highly reactive because of their large surface area In the presence of oxygen and water they rapidly oxidize to form free iron ions They are widely used in medical and laboratory applications and have also been studied for remediation of industrial sites contaminated with chlorinated organic compounds Contents 1 Synthesis 2 Reactivity 3 Research 4 See also 5 References 6 External linksSynthesis editIron nanoparticles can be synthesized by the reduction of Fe II or Fe III salt with sodium borohydride in an aqueous medium nbsp Reactivity editWhen exposed to oxygen and water iron oxidizes This redox process can occur under either acidic or neutral basic conditions 2 Fe0 s 4 H aq O2 aq 2 Fe2 aq 2 H2O l Fe0 s 2 H2O aq Fe2 aq H2 g 2 OH aq Research editResearch has shown that nanoscale iron particles can be effectively used to treat several forms of ground contamination including grounds contaminated by polychlorinated biphenyls PCBs chlorinated organic solvents and organochlorine pesticides Nanoscale iron particle are easily transportable through ground water allowing for in situ treatment Additionally the nanoparticle water slurry can be injected into the contaminated area and stay there for long periods of time 1 These factors combine to make this method cheaper than the most currently used alternative Researchers have found that although metallic iron nanoparticles remediate contaminants well they tend to agglomerate on the soil surfaces In response carbon nanoparticles and water soluble polyelectrolytes have been used as supports to the metallic iron nanoparticles The hydrophobic contaminants adsorb to these supports improving permeability in sand and soil 1 In field tests have generally confirmed lab findings However research is still ongoing and nanoscale iron particles are not yet commonly used for treating ground contamination See also editHealth and safety hazards of nanomaterials Environmental implications of nanotechnologyReferences edit a b Zhang Wei xian 2003 Nanoscale iron particles for environmental remediation an overview Journal of Nanoparticle Research 5 3 4 323 332 Bibcode 2003JNR 5 323Z doi 10 1023 A 1025520116015 2 http www chalcogen infim ro 1771 Yuvakkaur pdfExternal links editNational Nanotechnology Initiative Nanotechnology methods to clean up water pollution Largescale production and applications of zero valent iron nanoparticles nZVI nbsp This nanotechnology related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Iron nanoparticle amp oldid 1070726845, wikipedia, wiki, book, books, library,
