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The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe^{0}$/MnO_{2}$ System
| Content Provider | MDPI |
|---|---|
| Author | Cao, Viet Alyoussef, Ghinwa Gatcha-Bandjun, Nadège Gwenzi, Willis Noubactep, Chicgoua |
| Copyright Year | 2021 |
| Description | The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One of the most promising approaches is the amendment with manganese dioxide (Fe0/MnO2 system). The resulting system is a very complex one where characterization is challenging. The present communication uses methylene blue discoloration (MB method) to characterize the Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. The initial MB concentration was 10 mg L−1 with the following mass loading: [MnO2] = 2.3 g L−1, [sand] = 45 g L−1, and 0 < [Fe0] (g L−1) ≤ 45. The following systems where investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, and Fe0/MnO2/sand. Results demonstrated that MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the test-tubes. Results confirm the complexity of the Fe0/MnO2/sand system, while establishing that both MnO2 and sand improve the efficiency of Fe0/H2O systems in the long-term. The mechanisms of water decontamination by amending Fe0-based systems with MnO2 is demonstrated by the MB method. |
| Starting Page | 548 |
| e-ISSN | 22279717 |
| DOI | 10.3390/pr9030548 |
| Journal | Processes |
| Issue Number | 3 |
| Volume Number | 9 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-03-19 |
| Access Restriction | Open |
| Subject Keyword | Processes Water Science and Technology Manganese Oxides Mb Method Reactivity Materials Water Treatment Zero-valent Iron |
| Content Type | Text |
| Resource Type | Article |
