Removal of vanadium from aqueous solution using a red mud modified saw dust biochar
| Autor: | Bashir Ghanim, Lisa O'Donoghue, Ronan Courtney, Tony J. Pembroke, John G. Murnane, T. F. O’Dwyer |
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| Přispěvatelé: | Geological Survey of Ireland, EPA, EU Biomimic Consortium |
| Rok vydání: | 2020 |
| Předmět: |
bauxite residue
saw dust Inorganic chemistry red mud Vanadium chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Endothermic process symbols.namesake Adsorption 020401 chemical engineering Biochar 0204 chemical engineering Safety Risk Reliability and Quality Waste Management and Disposal 0105 earth and related environmental sciences Aqueous solution Chemistry Process Chemistry and Technology Langmuir adsorption model Red mud modified biochar adsorption Ionic strength vanadium symbols Biotechnology |
| Zdroj: | Journal of Water Process Engineering. 33:101076 |
| ISSN: | 2214-7144 |
| Popis: | peer-reviewed The full text of this article will not be available in ULIR until the embargo expires on the 12/12/2021 Adsorption studies were carried out on a red mud modified sawdust biochar material to assess its capacity in the removal of vanadium (V) from aqueous solution. In this study, a number of parameters which can potentially influence V(V) adsorption were investigated including equilibrium V(V) solution concentration, contact time for effective V(V) removal, temperature of the adsorption process, solution pH and ionic strength. The uptake of V(V) was shown to be heavily influenced by solution pH with maximum uptake (16.45 mg g−1) achieved in the pH range of 3.5 - 5.5. The adsorption process was best described by the Langmuir model. The kinetics of the adsorption process indicated that V(V) uptake occurred within 60 min of contact and that pseudo-second order kinetics best described the kinetics of the overall adsorption process. There was a clear increase in V(V) uptake with increasing temperature (range 293–343 K) indicating an endothermic adsorption process and the level of uptake remained largely unchanged at solution salt concentrations of up to 0.1 M NaCl and competing cation concentrations of up to 2000 mg L-1 of sodium and 200 mg L-1 aluminium. The relatively weak interaction between V(V) and the modified biochar surface may indicate a possibility of recovery of the bound V(V) and subsequent regeneration of the adsorbent. peer-reviewed |
| Databáze: | OpenAIRE |
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