Removal of metal ions from electrochemical decontamination solution using organic acids
- Removal of metal ions from electrochemical decontamination solution using organic acids
- 최재영; Marufa Naznin; 최지연; 신원식
- Heavy metals; electro-decontamination; oxalic acid; cyclodextrin; phosphoric acid
- Issue Date
- Separation science and technology
- VOL 52, NO 18-2896
- Applicability of the organic acids and cyclodextrin (CD) for the removal of Fe, Co and Ni from the spent electro-decontamination solution was investigated. Oxalic acid showed the highest removal efficiency: 90% for 0.89 M Fe and 95% for 0.0089 M Co and Ni, respectively. The metal– oxalate precipitates were characterized by differential scanning calorimetry/thermogravimetry analysis (DSC/TGA), Fourier transform infrared (FTIR) and X-ray fluorescence (XRF). After thermal decomposition at >300°C, the metal– oxalate precipitates were transformed into metal oxides (Fe2O3, FeO, CoO and NiO) and pure metals (Co and Ni). The results imply that organic acids have a high potential for the removal of heavy metals from electro-decontamination solutions.
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