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Vol. 25 No. 15 (2013): Vol 25 Issue 15

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Kinetic of Nitrate Reduction by Nanoscale Zero-Valent Iron on the Basis of Different Models Estimation

https://doi.org/10.14233/ajchem.2013.14792
Jianshe Tang
School of Environment and Energy Engineering, Anhui University of Architecture, 292 Ziyun Road, Economic-Technological Development Area, Hefei 230601, P.R. China
Li Xiang
School of Environment and Energy Engineering, Anhui University of Architecture, 292 Ziyun Road, Economic-Technological Development Area, Hefei 230601, P.R. China
Feng Zhao
School of Environment and Energy Engineering, Anhui University of Architecture, 292 Ziyun Road, Economic-Technological Development Area, Hefei 230601, P.R. China

Corresponding Author(s) : Jianshe Tang

tjs28@aiai.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

In this study, a more fine-grained spherical nanoscale zero valent iron (nZVI) with diameter of 20-50 nm was synthesized in ethanol-water mixed solvent. The structures and physical properties of nZVI were characterized by transmission electron microscope, X-ray diffractometer analyzer. Reactivity of the nZVI was affirmed by denitrification of nitrate. The removal efficiency of nitrate in the presence of nZVI was 80 % within 1 h at optimal conditions. In view of this, the nZVI is efficient to removing nitrate and offers a great potential to the removal of other contaminants in water. The kinetic estimations in terms of three kinds model (the first-order, the second-order and the Langmuir-Hinshelwood) under the conditions of different initial nitrate concentration or different nZVI dosage were compared with each other. The result was obtained that the S-model fits the denitrification very well.

Keywords

Nanoscale zero valent iron Nitrate Kinetic Reduction
Tang, J., Xiang, L., & Zhao, F. (2013). Kinetic of Nitrate Reduction by Nanoscale Zero-Valent Iron on the Basis of Different Models Estimation. Asian Journal of Chemistry, 25(15), 8471–8474. https://doi.org/10.14233/ajchem.2013.14792
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