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Environ Sci Technol. 2016 Jul 19;50(14):7290-304. doi: 10.1021/acs.est.6b01897. Epub 2016 Jul 1.

Environmental Remediation and Application of Nanoscale Zero-Valent Iron and Its Composites for the Removal of Heavy Metal Ions: A Review.

Author information

1
School of Environment and Chemical Engineering, North China Electric Power University , Beijing 102206, P. R. China.
2
School of Chemistry, Biological and Materials Sciences, East China Institute of Technology , Nanchang, 330013, P. R. China.
3
Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Jiangsu, P.R. China.
4
NAAM Research Group, Faculty of Science, King Abdulaziz University , Jeddah 21589, Saudi Arabia.
5
Department of Mathematics, Quaid-I-Azam University , Islamabad 44000, Pakistan.

Abstract

The presence of heavy metals in the industrial effluents has recently been a challenging issue for human health. Efficient removal of heavy metal ions from environment is one of the most important issues from biological and environmental point of view, and many studies have been devoted to investigate the environmental behavior of nanoscale zerovalent iron (NZVI) for the removal of toxic heavy metal ions, present both in the surface and underground wastewater. The aim of this review is to show the excellent removal capacity and environmental remediation of NZVI-based materials for various heavy metal ions. A new look on NZVI-based materials (e.g., modified or matrix-supported NZVI materials) and possible interaction mechanism (e.g., adsorption, reduction and oxidation) and the latest environmental application. The effects of various environmental conditions (e.g., pH, temperature, coexisting oxy-anions and cations) and potential problems for the removal of heavy metal ions on NZVI-based materials with the DFT theoretical calculations and EXAFS technology are discussed. Research shows that NZVI-based materials have satisfactory removal capacities for heavy metal ions and play an important role in the environmental pollution cleanup. Possible improvement of NZVI-based materials and potential areas for future applications in environment remediation are also proposed.

PMID:
27331413
DOI:
10.1021/acs.est.6b01897
[Indexed for MEDLINE]

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