TY - JFULL AU - Marius Gheju and Laura Cocheci PY - 2011/8/ TI - Hexavalent Chromium Pollution Abatement by use of Scrap Iron T2 - International Journal of Environmental and Ecological Engineering SP - 390 EP - 396 VL - 5 SN - 1307-6892 UR - https://publications.waset.org/pdf/11025 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 55, 2011 N2 - In this study, the reduction of Cr(VI) by use of scrap iron, a cheap and locally available industrial waste, was investigated in continuous system. The greater scrap iron efficiency observed for the first two sections of the column filling indicate that most of the reduction process was carried out in the bottom half of the column filling. This was ascribed to a constant decrease of Cr(VI) concentration inside the filling, as the water front passes from the bottom to the top end of the column. While the bottom section of the column filling was heavily passivated with secondary mineral phases, the top section was less affected by the passivation process; therefore the column filling would likely ensure the reduction of Cr(VI) for time periods longer than 216 hours. The experimental results indicate that fixed beds columns packed with scrap iron could be successfully used for the first step of Cr(VI) polluted wastewater treatment. However, the mass of scrap iron filling should be carefully estimated since it significantly affects the Cr(VI) reduction efficiency. ER -