“From these results, we found that Fe(II) ion plays an accelerator for the reduction of Se(VI ) by ZVI with the stoichiometric balance of 1.4 (=nFe2+/nSe6+).”
“The test to remove 50 mg/L of Se(VI) by 1 g/L of ZVI resulted in about 60 % … case with absence of Fe(II), but other tests with the addition of 50 and 100 mg/L of the Fe(II ) had increased the … % of the Se(VI), ….”