Preparation,characterization, and kinetics of nanoscale iron in nitrate nitrogen removal from polluted water |
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Authors: | Yujia Song Shoufa Song |
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Affiliation: | 1. Department of Environmental Engineering, Changchun University of Science and Technology, Changchun, P.R. Chinajlsongyujia@126.com;3. Northeast Coal Industry Institute of Environmental Protection, Changchun, P.R. China |
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Abstract: | The aim of this study was to examine the production of nanoscale ions via the liquid phase reduction method and the effectiveness of the removal of nitrate nitrogen (NO3?–N) as well as measure the products and kinetics of the reactions. The nanoparticles obtained were approximately 50 nm in diameter and the main component was iron (Fe). This custom-made nanoscale Fe was highly positively charged, and reacted rapidly with NO3?–N in oxygen-free and neutral conditions at room temperature. A 90% removal rate was achieved when the reaction occurred for 30 min in simulation sample water with vigorous shaking at 250 r/min at NO3?–N concentrations of 30, 50, 80 or120 mg N/L. The nanometer Fe dosage was maintained throughout the experiment at 4 g/L. A first-order kinetics equation was applied to the obtained experimental data which followed a pseudo first-order reaction. Data demonstrated that the removal of nitrate nitrogen from polluted groundwater using a nanoscale Fe iron was effective and rapid. |
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Keywords: | nitrate nitrogen pollution reaction kinetics environment water |
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