A review on nanotechnological application of magnetic iron oxides for heavy metal removal

By R. Bhateria, Rimmy Singh. Journal of Water Process Engineering, 2019

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Abstract With increasing trend in industrialization, heavy metals possess a great threat to the environment due to their discharge in water and wastewater above permissible limits. Heavy metals have toxic effects on human and environment. However, advancement in newly budding and fangled nanotechnology offers better treatment techniques. Development of novel and cost-effective 0D, 1D, 2D and 3D nanomaterials for environmental remediation, pollution detection and other applications has attracted considerable attention. Zero valent iron and iron oxide nanoparticles are found to be the best candidates for heavy metal adsorption and removal. Various mechanical, optical and electrical properties of nanoparticles play important role in nanoparticle formation and interaction. Forms of iron oxide such as hematite (α Fe2O3) and magnetite (Fe3O4) nanoparticles of varied morphology and size (10 nm, 20 nm, 50 nm etc.) were synthesized by various methods like sol-gel, precipitation, hydrothermal processes and magnetic nano-composites with different iron precursors (iron acetate, iron nitrate, ferric chloride, ferrous sulphate etc.). Iron oxide nanoparticles (in a variety of chemical and structural forms) have already exhibited its diversity and potential in many frontiers of environmental area. Present review is focused on the application of iron and iron oxide nanoparticles towards heavy metal removal.

Subfields: Biomedical Engineering, Organic Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f7b3ba4438e1f0c2a8f730a4abecc8e46108a640

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