The electro-sorption properties of nickel on laterite gangue leached with an organic chelating acid
In this study the affinity of nickel ions on laterite gangue as a function of pH was investigated as an alternative reason for nickel losses observed during the bioleaching of nickel laterite ores. In microbiological extraction of nickel from laterites, dissolved nickel concentration in the leaching...
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| Veröffentlicht in: | Minerals engineering 2001-02, Vol.14 (2), p.205-215 |
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| container_title | Minerals engineering |
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| creator | Valix, M Usai, F Malik, R |
| description | In this study the affinity of nickel ions on laterite gangue as a function of pH was investigated as an alternative reason for nickel losses observed during the bioleaching of nickel laterite ores. In microbiological extraction of nickel from laterites, dissolved nickel concentration in the leaching medium at the end was observed to be lower than at the beginning. It has been suggested that this was associated with the uptake of metal by the biomass of the fungi. This study demonstrated that electrosorption of nickel does contribute to metal loss during bioleaching. The surface charge and the type of minerals present in the ore gangue were shown to have an important influence on the adsorption capacity. The analysis of the process suggest that control of pH during the bioleaching process is critical in optimising the leaching process. |
| doi_str_mv | 10.1016/S0892-6875(00)00176-X |
| format | Article |
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In microbiological extraction of nickel from laterites, dissolved nickel concentration in the leaching medium at the end was observed to be lower than at the beginning. It has been suggested that this was associated with the uptake of metal by the biomass of the fungi. This study demonstrated that electrosorption of nickel does contribute to metal loss during bioleaching. The surface charge and the type of minerals present in the ore gangue were shown to have an important influence on the adsorption capacity. 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In microbiological extraction of nickel from laterites, dissolved nickel concentration in the leaching medium at the end was observed to be lower than at the beginning. It has been suggested that this was associated with the uptake of metal by the biomass of the fungi. This study demonstrated that electrosorption of nickel does contribute to metal loss during bioleaching. The surface charge and the type of minerals present in the ore gangue were shown to have an important influence on the adsorption capacity. The analysis of the process suggest that control of pH during the bioleaching process is critical in optimising the leaching process.</description><subject>Applied sciences</subject><subject>Bioleaching</subject><subject>Exact sciences and technology</subject><subject>Hydrometallurgy</subject><subject>Metals. Metallurgy</subject><subject>non-ferrous metallic ores</subject><subject>pH control</subject><subject>Production of metals</subject><subject>Production of non ferrous metals. 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| language | eng |
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| subjects | Applied sciences Bioleaching Exact sciences and technology Hydrometallurgy Metals. Metallurgy non-ferrous metallic ores pH control Production of metals Production of non ferrous metals. Process materials |
| title | The electro-sorption properties of nickel on laterite gangue leached with an organic chelating acid |
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