Enhancement of solid dissolution by ultrasound
The ultrasonic enhancement of the reduction of dissolved ferric iron (Fe 3+) to ferrous iron (Fe 2+) with sphalerite (zinc sulfide) concentrate in a sulfuric acid solution, which is an industrially important reaction in zinc production, was studied. The temperature of the experiments varied between...
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| Published in | Chemical engineering and processing Vol. 46; no. 9; pp. 862 - 869 |
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| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.09.2007
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| Subjects | |
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| Abstract | The ultrasonic enhancement of the reduction of dissolved ferric iron (Fe
3+) to ferrous iron (Fe
2+) with sphalerite (zinc sulfide) concentrate in a sulfuric acid solution, which is an industrially important reaction in zinc production, was studied.
The temperature of the experiments varied between 75
°C and 95
°C. The initial concentrations of ferric iron and sphalerite were 0.179
mol/L and 0.107
mol/L, i.e. 1.2:2 reducing agent-to-ferric iron molar ratio was used in a 0.40
M sulfuric acid solution. The effect of ultrasonic power, duration of ultrasound cycles and the time between the cycles were studied. The concentration of ferric iron was determined by sequential injection analysis (SIA).
The apparent effect of ultrasound varied depending on the conditions used, but it clearly enhanced the rate of the reaction especially when the impact of mass transfer was essential.
Eleven different models were tested for silent systems. These models are utilized in the present kinetic study for explaining the kinetics of the reduction reaction of spherical particles when ultrasound is employed. |
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| AbstractList | The ultrasonic enhancement of the reduction of dissolved ferric iron (Fe
3+) to ferrous iron (Fe
2+) with sphalerite (zinc sulfide) concentrate in a sulfuric acid solution, which is an industrially important reaction in zinc production, was studied.
The temperature of the experiments varied between 75
°C and 95
°C. The initial concentrations of ferric iron and sphalerite were 0.179
mol/L and 0.107
mol/L, i.e. 1.2:2 reducing agent-to-ferric iron molar ratio was used in a 0.40
M sulfuric acid solution. The effect of ultrasonic power, duration of ultrasound cycles and the time between the cycles were studied. The concentration of ferric iron was determined by sequential injection analysis (SIA).
The apparent effect of ultrasound varied depending on the conditions used, but it clearly enhanced the rate of the reaction especially when the impact of mass transfer was essential.
Eleven different models were tested for silent systems. These models are utilized in the present kinetic study for explaining the kinetics of the reduction reaction of spherical particles when ultrasound is employed. |
| Author | Rönnholm, Mats Murzina, Elena Lahtinen, Marko Eränen, Kari Grénman, Henrik Mikkola, Jyri-Pekka Murzin, Dmitry Yu Salmi, Tapio |
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| Cites_doi | 10.1016/S1350-4177(99)00041-3 10.1016/S0009-2509(97)00193-0 10.1007/BF00683739 10.1021/j100372a048 10.1021/ie9804172 10.1016/S0304-386X(02)00040-3 10.1016/S0040-6031(02)00133-8 10.1016/1350-4177(94)90001-9 10.1126/science.2309118 10.1016/0041-624X(90)90035-M 10.1016/S0022-0728(96)04742-0 10.1016/S0304-386X(02)00193-7 10.1016/j.hydromet.2003.11.002 10.1016/j.cej.2004.01.022 10.1016/0304-386X(94)00021-T 10.1016/S1350-4177(00)00078-X 10.1016/S0003-2670(00)83937-9 10.1016/S0304-386X(00)00059-1 10.1016/1350-4177(95)00018-2 10.1016/j.cep.2003.11.002 10.1016/0304-386X(91)90032-H 10.1039/CS9871600239 10.1038/scientificamerican0289-80 10.1016/S0304-386X(02)00137-8 10.1016/S0040-6031(99)00256-7 |
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| Snippet | The ultrasonic enhancement of the reduction of dissolved ferric iron (Fe
3+) to ferrous iron (Fe
2+) with sphalerite (zinc sulfide) concentrate in a sulfuric... |
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| SubjectTerms | Dissolution Kinetic modeling Sphalerite concentrate Ultrasound Variable effect |
| Title | Enhancement of solid dissolution by ultrasound |
| URI | https://dx.doi.org/10.1016/j.cep.2007.05.013 |
| Volume | 46 |
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