International Journal of Environmental Sciences

Volume 4 Issue 4 2014- January 2014    Pages: 472-483  <<Previous    Next>>

Application of surface functionalized iron oxide nanomaterials as a nanosorbents in extraction of toxic heavy metals from ground water: A review

Author Information:

Nikhat Neyaz, Weqar Ahmad Siddiqui, Kishore K. Nair

Department of Applied Sciences and Humanities, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi-110 025

ABSTRACT

Rapid industrialization, urbanization, geological erosion and natural calamities are the common factors that lead to the discharge of heavy metal ions directly into natural water resources. Heavy metals including Cd, Cr, As, Pb, Hg, etc. are considered to be high risk for humans, animals and plants due to their toxic and ill effect .It affects human health by precipitation, adsorption and accumulation in the food chain. Its non biodegradable nature poses a serious threat to the environment. Many conventional techniques have come forward to remove heavy metals from waste water but their application is limited in term of cost, efficiency and flexibility. Adsorption technology at nanoscale dimension is regarded as a most promising one to remove heavy metals ions .Nanosorbents are very effective separation medium for toxic metals from waste water as they  are known for their high surface area to mass ratio as well as high selectivity, specificity and adsorption capacities .Surface modified iron oxide nanosorbents have special advantages in purification of waste water  in term of cost, flexibility, simplicity of design /operation ,sensitivity to toxic pollutant, least toxic,  reusable with maximum efficiency. The present review critically evaluates the potential application of surface engineered iron oxide nanosorbents in water purification.

Keywords - Adsorption technology, Nanosorbents, Ironoxide nanoparticles, surface engineered iron oxide nanoparticles, water purification

DOI:10.6088/ijes.2014040400004

© 2013 Copyright by the authors, licensee Integrated Publishing Association.This is an open access article distributed under the Creative Commons Attribution License (3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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