2,4,6-Trinitrotoluene reduction kinetics in aqueous solution using nanoscale zero-valent iron

Reductive degradation of perfluorinated compounds in water using Mg-aminoclay coated nanoscale zero valent iron

“…These results indicate that the removal rate of PFCs is greatly affected by the temperature and at ambient temperatures this process could be applied for water/wastewater decontamination. These findings are contrary to a previous study [33], reporting that the removal rate for reaction (reduction) of contaminant (2,4,6-trinitrotoluene) with nZVI is enhanced by increased temperature. It should be mentioned that the aforementioned study was conducted using uncoated nZVI [33].…”

“…These findings are contrary to a previous study [33], reporting that the removal rate for reaction (reduction) of contaminant (2,4,6-trinitrotoluene) with nZVI is enhanced by increased temperature. It should be mentioned that the aforementioned study was conducted using uncoated nZVI [33]. The contradictive result on the effect of temperature could be an evidence of adsorption as a first step before their reduction.…”

“…Specifically for PFOA and PFNA, the removal efficiency was increased almost 2-fold from 8 % to 15 % and from 35 % to 77 %, respectively, when 100 mg L -1 MgAC-nZVI were used. This behavior is in agreement with previous reports [31,33], where nZVI was applied to remove other micropollutants and can be attributed to the increase of total surface area with increase of nZVI dosage. On the contrary, with the exception of PFOA, further increase of nZVI concentration from 100 to 1000 mg L -1 did not significantly affect PFCs removal.…”

Highly concentrated, reactive and stable dispersion of zero-valent iron nanoparticles: Direct surface modification and site application

“…The removal of more than 70 environmental contaminants has been already reported [3]. From these contaminants especially polychlorinated hydrocarbons (e.g., [1,2,[4][5][6][7][8]), highly toxic substances like As(III), As(V), Cu(II), Co(II), Cr(VI) (e.g., [9][10][11][12][13][14][15]), nitrite [16], amoxicillin and ampicillin [17], metronidazole [18], TNT [19], pesticides [20] or cyanobacteria [21] should be mentioned. However, efficiency of the nZVI particles is strongly dependent not only on their size and concentration in dispersions but also on their ability to migrate through saturated porous media.…”

Enhanced adsorptive degradation of Congo red in aqueous solutions using polyaniline/Fe0 composite nanofibers

“…For example, the use of zero-valent iron nanoparticles (Fe 0 ) represents a promising approach to the remediation of groundwater and surface water contaminated with chlorinated organics, heavy metals, nitro-aromatic compounds, nitrates and dyes [6][7][8][9][10][11]. The advantages of using Fe 0 nanoparticles when compared to conventional micron size granular iron powders include the potentially high reactivity as a consequence of high surface areas, higher colloidal stability, possible suspension as a slurry, and better injectibility into the subsurface [12][13][14].…”