Iron (Fe) is widely used for soil, water and wastewater treatment and exists in many forms including zero-valent state, ionic forms (ferrous (Fe(II)) and ferric (Fe(III)), and oxides and oxyhydroxides. In this study, we will present updates on synthesis and applications of zero-valent iron nanoparticle (INP) based on our studies and literature. INP is used to reduce, oxidize, and adsorb organic and inorganic contaminants, heavy metals, metalloids, and actinides from the environment depending on experimental and field conditions. Since INP spontaneously oxidizes and becomes immobile in soil and groundwater, surface modified INP (S-INP) was invented for in-situ as well as ex-situ remediation. Here we evaluate the progress that has been made with INP and S-INP, and more recently bi and tri-metallic INP. Laboratory based experiments for INP applications have already been demonstrated and bimetallic and tri-metallic INP and S-INP may be used as efficient, high-surface area slurries for in-situ soil and groundwater remediation. Moreover, owing to the excellent reactivity and high surface area of different INPs and S-INPs, it is possible to remove and destruct a variety of contaminants from soil, water and wastewater.

Zero-valent iron nanoparticles for soil, water and wastewater treatment: Present scenario

251st National Meeting (2016)

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