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| Thermodynamics of Sulfidation of Arsenite in Alkaline Solutions |
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Received:February 18, 2016
Revised:February 22, 2016
Accepted:February 24, 2016
Published Online:June 27, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.07.002 |
| KeyWord:alkaline solution; arsenite; thioarsenite; sulfidation; thermodynamics |
| Author | Institution |
| XU Zhifeng |
江西理工大学冶金与化学工程学院 |
| Zhang Xuekai |
江西理工大学冶金与化学工程学院 |
| Zhao Hongxing |
江西理工大学冶金与化学工程学院 |
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| Abstract: |
| Thermodynamics of arsenite sulfidation in alkaline solutions were investigated to optimize solvent extraction process of thioarsenite under high-alkalinity condition. The concentration curves of AsIII ions are determined with changes of pH values and S/As molar ratio based on the known thermodynamic data. Furthermore, the effects of pH and sulfidizing agent dosage on sulfidation and products morphology are discussed respectively. The results show that though feasible in thermodynamics, sulfidation process is probably inhibited due to high alkalinity. Increase of sulfidizing agent dosage can effectively promote sulfidation process. |
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