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- W2067184661 abstract "The impact of sand on the efficiency of metallic iron (Fe0) at discoloring a methylene blue (MB) solution in the presence of MnO2 was characterized. The MB initial concentration was 10 mg L−1. 22.0 mL of this solution was used for each test. Investigated systems were: (i) Fe0 alone, (ii) MnO2 alone, (iii) sand alone, (iv) a sand/MnO2 mixture, and (v) Fe0/sand/MnO2 mixtures with three different natural MnO2-bearing minerals. Tested material loadings varied from 0.0 to 45.0 g L−1. A commercial Fe0 and three natural MnO2 materials (Manganite, Psilomelane and X-MnO2) were tested in shaken experiments at 75 rpm for 14 days. The documented delay of MB discoloration by Fe0 in the presence of MnO2 was the evaluation criterion. This characteristic discoloration delay was observed for all tested materials at MnO2 loadings <6 g L−1. For higher MnO2 loadings, the Fe0/Manganite/sand system was more efficient than the Fe0/sand system. The largest extend of the delay of MB discoloration was observed in the Fe0/X-MnO2/sand system. This observation delineated the crucial importance of characterizing the intrinsic reactivity of tested MnO2 materials for comparable results. This study highlighted the crucial importance of experimental conditions as major source of confusing/conflicting reports." @default.
- W2067184661 created "2016-06-24" @default.
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- W2067184661 date "2015-02-01" @default.
- W2067184661 modified "2023-09-27" @default.
- W2067184661 title "Characterizing the impact of sand addition on the efficiency of granular iron for contaminant removal in batch systems" @default.
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- W2067184661 doi "https://doi.org/10.1016/j.cej.2014.10.038" @default.
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