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| Leaching Kinetics and Separation of Antimony and Arsenic from Arsenic Alkali Residue |
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Received:August 30, 2011
Revised:August 30, 2011
Accepted:August 31, 2011
Published Online:February 24, 2012
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| DOI：doi：10.3969/j.issn.1007-7545.2012.03.001 |
| KeyWord:arsenic alkali residue；separation of antimony and arsenic；leaching kinetics; activation energy |
| Author | Institution |
| LI Hui, ZENG Gui-sheng, SHAO Jian-guang, DENG Xiao-rong |
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| Abstract: |
| The leaching kinetics and separation of antimony and arsenic from arsenic alkali residue were studied. The effects of solid/liquid ratio, stirring velocity, temperature and time on arsenic leaching rate were investigated with the orthogonal test. The results show that the optimum conditions include solid/liquid ratio of 1∶4, temperature of 90 ℃, stirring velocity of 600 r/min, and time of 60 min. The kinetic equation can be expressed as . The activation energy for arsenic leaching is 666.57 kJ/mol based on a chemical reaction-controlled process. |
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