The removal of nitrate by nanoscale iron particles produced using the sodium borohydride method |
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Authors: | Cho Hyoung-Chan Park Sung Hoon Ahn Ho-Geun Chung Minchul Kim Byungwhan Kim Sun-Jae Seo Seong-Gyu Jung Sang-Chul |
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Affiliation: | Department of Environmental Engineering, Sunchon National University, Jeonnam 540-742, Korea. |
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Abstract: | This study was conducted to investigate removal of nitrate by nanoscale zero-valent iron (ZVI) particles in aqueous solution. ZVI particles was produced from wasted acid that is by-products of a pickling line at a steel work. The reaction activity of ZVI particles was evaluated through decomposition experiments of NO3-N aqueous solution. Addition of a larger amount of ZVI particles resulted in a higher decomposition rate. ZVI particles showed higher decomposition efficiencies than commercially purchased ZVI particles at all pH values. Both ZVIs showed a higher decomposition rate at a lower pH. Virtually no decomposition reaction was observed at pH of 4 or higher for purchased ZVI. The ZVI particles produced directly from wasted acid by the sodium borohydride method were not easy to handle because they were very small (10-200 nm) and were oxidized easily in the air. |
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