title: The removal of nitrate by nanoscale iron particles produced using the sodium borohydride method.
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.
authors: Department of Environmental Engineering, Sunchon National University, Jeonnam 540-742, Korea.
authors: Hyoung-Chan
authors: HC
authors: Cho
authors: Sung Hoon
authors: SH
authors: Park
authors: Ho-Geun
authors: HG
authors: Ahn
authors: Minchul
authors: M
authors: Chung
authors: Byungwhan
authors: B
authors: Kim
authors: Sun-Jae
authors: SJ
authors: Kim
authors: Seong-Gyu
authors: SG
authors: Seo
authors: Sang-Chul
authors: SC
authors: Jung