1. Biosorption of indium(III) from aqueous solutions by microalgal biomass: study of various process parameters.
- Author
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Nicomel N.R., Biohydrometallurgy '18 Windhoek, Namibia 12-Jun-1813-Jun-18, Arashiro L., Du Laing G., Ferrer I., Garfi M., Hennebel T., Otero-Gonzalez L., Nicomel N.R., Biohydrometallurgy '18 Windhoek, Namibia 12-Jun-1813-Jun-18, Arashiro L., Du Laing G., Ferrer I., Garfi M., Hennebel T., and Otero-Gonzalez L.
- Abstract
Municipal wastewater was used to prepare microalgal biosorbents for the biosorption of indium from secondary sources. Different biosorption parameters were studied in the laboratory, including pH, contact time, initial In concentration, and presence of competing ions. The desorption of In ions adsorbed by the microalga biomass was investigated using desorbing agents HCl, HNO3, NaCl, CaCl2, and EDTA. Results showed that the biosorbent had a maximum In adsorption capacity of 0.20 mmol/g, which was observed at an initial pH value of 3. The adsorption equilibrium data were found to fit the Langmuir isotherm model, indicating that indium ions were adsorbed in monolayers onto the homogeneous active sites of the biomass surface. The kinetics data showed that biosorption attained equilibrium within 30 minutes. Cu, Zn, Sn, Al, and Fe did not show a negative effect on In removal efficiencies, and indium selectivity was observed over Zn and Cu. It was found that the biosorbent could be regenerated using 0.1 M HCl solution, with up to 85% In recovery., Municipal wastewater was used to prepare microalgal biosorbents for the biosorption of indium from secondary sources. Different biosorption parameters were studied in the laboratory, including pH, contact time, initial In concentration, and presence of competing ions. The desorption of In ions adsorbed by the microalga biomass was investigated using desorbing agents HCl, HNO3, NaCl, CaCl2, and EDTA. Results showed that the biosorbent had a maximum In adsorption capacity of 0.20 mmol/g, which was observed at an initial pH value of 3. The adsorption equilibrium data were found to fit the Langmuir isotherm model, indicating that indium ions were adsorbed in monolayers onto the homogeneous active sites of the biomass surface. The kinetics data showed that biosorption attained equilibrium within 30 minutes. Cu, Zn, Sn, Al, and Fe did not show a negative effect on In removal efficiencies, and indium selectivity was observed over Zn and Cu. It was found that the biosorbent could be regenerated using 0.1 M HCl solution, with up to 85% In recovery.
- Published
- 2018