Molybdenum (Mo) is a naturally occurring trace element that is present in drinking water mostly in the molybdate (MoO42-) form in well water. Recently, the EPA deemed Mo as a potential contaminant because exposure can lead to health effects such as gout, hyperuricemia, and lung cancer. In this work, we have assessed the sorptive removal of Mo using Douglas fir biochar (DFBC) and its chemically-coprecipitated iron oxide analogue (DFMBC). Adsorption was studied varying the batch sorption conditions; pH, equilibrium time (5 min-24 h), initial Mo concentrations (2.5-1000 mg/L), temperatures (5, 25, and 40 °C) and equilibrium method. Langmuir capacities for DFBC and DFMBC (at pH 3, 2 h equilibrium) were in 359.3-487.9 mg/g and 288.3-571.9 mg/g range, respectively. Adsorbents and Mo-laden adsorbents were characterized by elemental analysis, BET, PZC, SEM, TEM, EDS, XRD, and XPS. These data suggest that DFBC and DFMBC can be potential candidates for Mo sorption.
| Identifer | oai:union.ndltd.org:MSSTATE/oai:scholarsjunction.msstate.edu:td-4790 |
| Date | 07 August 2020 |
| Creators | Das, Naba Krishna |
| Publisher | Scholars Junction |
| Source Sets | Mississippi State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
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