The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One most promising approaches amendment with manganese dioxide (Fe0/MnO2 system). resulting system a very complex one where characterization challenging. present communication uses methylene blue discoloration (MB method) characterize Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. initial MB concentration was 10 mg L?1 following mass loading: [MnO2] = 2.3 g L?1, [sand] 45 and 0 < [Fe0] (g L?1) ? 45. systems investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, Fe0/MnO2/sand. Results demonstrated that influenced by diffusive transport from solution aggregates at bottom test-tubes. confirm complexity Fe0/MnO2/sand system, establishing both MnO2 sand improve efficiency Fe0/H2O in long-term. mechanisms water decontamination amending method.