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http://dx.doi.org/10.5338/KJEA.2010.29.4.402

Synthesis of Nanoscale Zerovalent Iron Particle and Its Application to Cr(VI) Removal from Aqueous Solutions  

Awad, Yasser M. (Department of Biological Environment, Kangwon National University)
Abdelhafez, Ahmed A. (Department of Biological Environment, Kangwon National University)
Ahmad, Mahtab (Department of Biological Environment, Kangwon National University)
Lee, Sang-Soo (Department of Biological Environment, Kangwon National University)
Kim, Rog-Young (Division of Soil & Fertilizer Management, National Academy of Agricultural Science)
Sung, Jwa-Kyung (Division of Soil & Fertilizer Management, National Academy of Agricultural Science)
Ok, Yong-Sik (Department of Biological Environment, Kangwon National University)
Publication Information
Korean Journal of Environmental Agriculture / v.29, no.4, 2010 , pp. 402-407 More about this Journal
Abstract
Zerovalent iron (ZVI) is one of the most commonly used metallic reducing agents for the treatment of toxic contaminants in wastewater. Traditional ZVIs are less effective than nanoscale ZVI (nZVI) due to prolonged reaction time. However, the reactivity can be significantly increased by reducing the size of ZVI particles to nanoscale. In this study, nZVI particles were synthesized under laboratory condition and their efficiency in removing hexavalent chromium (Cr(VI)) from aqueous solutions were compared with commercially available ZVI particles. The results showed that the synthesized nZVI particles (SnZVI) reduced >99% of Cr(VI) at the application rate of 0.2% (w/v), while commercial nZVI (CnZVI) particles resulted in 59.6% removal of Cr(VI) at the same application rate. Scanning electron micrographs (SEM) and energy dispersive spectra (EDS) of the nZVI particles revealed the formation of Fe-Cr hydroxide complex after reaction. Overall, the SnZVI particles can be used in treating chromium contaminated wastewater.
Keywords
Nanoscale zerovalent iron; Reduction; Hexavalent chromium; Wastewater; Redox reaction;
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