Dissolution kinetics of hemimorphite in trichloroacetic acid solutions
In this study, the dissolution kinetics of hemimorphite in the presence of the organic reagent, trichloroacetic acid (TCAA), was investigated. Experimental variables such as reaction temperature (293–323 K), TCAA concentration (0.084–0.184 mol/dm3), particle size (0.081–0.214 mm), and stirring speed...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-04-01
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| Series: | Journal of Materials Research and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785418306938 |
| _version_ | 1818966854244237312 |
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| author | Qian Zhang Shuming Wen Dandan Wu Qicheng Feng Shuo Li |
| author_facet | Qian Zhang Shuming Wen Dandan Wu Qicheng Feng Shuo Li |
| author_sort | Qian Zhang |
| collection | DOAJ |
| description | In this study, the dissolution kinetics of hemimorphite in the presence of the organic reagent, trichloroacetic acid (TCAA), was investigated. Experimental variables such as reaction temperature (293–323 K), TCAA concentration (0.084–0.184 mol/dm3), particle size (0.081–0.214 mm), and stirring speed (200–650 rpm) were studied to determine the influence on the zinc dissolution rate, and a kinetic model was developed to represent the relationship. The results demonstrated that during the leaching process, zinc was rapidly dissolved in TCAA and the zinc leaching rate increased as a function of increased reaction temperature, TCAA concentration, and stirring speed, and decreased particle size. Among the kinetic models of the porous solids tested, a new variant of the shrinking-core model well described the zinc leaching kinetics. The activation energy was determined to be 54.94 kJ/mol, and the rate of reaction equation [1 − (2/3)x − (1 − x)2/3]2 = [11.24(C)3.80946(PS)−2.00833(SS)1.62147 exp(−54.94/RT)]t was also obtained to describe the process. Keywords: Dissolution, Kinetics, Hemimorphite, Trichloroacetic acid |
| first_indexed | 2024-12-20T13:39:31Z |
| format | Article |
| id | doaj.art-df59c1616a6b46c08a2eee0df0679211 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-20T13:39:31Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-df59c1616a6b46c08a2eee0df06792112022-12-21T19:38:50ZengElsevierJournal of Materials Research and Technology2238-78542019-04-018216451652Dissolution kinetics of hemimorphite in trichloroacetic acid solutionsQian Zhang0Shuming Wen1Dandan Wu2Qicheng Feng3Shuo Li4State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; Corresponding authors.State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China; Corresponding authors.State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR ChinaIn this study, the dissolution kinetics of hemimorphite in the presence of the organic reagent, trichloroacetic acid (TCAA), was investigated. Experimental variables such as reaction temperature (293–323 K), TCAA concentration (0.084–0.184 mol/dm3), particle size (0.081–0.214 mm), and stirring speed (200–650 rpm) were studied to determine the influence on the zinc dissolution rate, and a kinetic model was developed to represent the relationship. The results demonstrated that during the leaching process, zinc was rapidly dissolved in TCAA and the zinc leaching rate increased as a function of increased reaction temperature, TCAA concentration, and stirring speed, and decreased particle size. Among the kinetic models of the porous solids tested, a new variant of the shrinking-core model well described the zinc leaching kinetics. The activation energy was determined to be 54.94 kJ/mol, and the rate of reaction equation [1 − (2/3)x − (1 − x)2/3]2 = [11.24(C)3.80946(PS)−2.00833(SS)1.62147 exp(−54.94/RT)]t was also obtained to describe the process. Keywords: Dissolution, Kinetics, Hemimorphite, Trichloroacetic acidhttp://www.sciencedirect.com/science/article/pii/S2238785418306938 |
| spellingShingle | Qian Zhang Shuming Wen Dandan Wu Qicheng Feng Shuo Li Dissolution kinetics of hemimorphite in trichloroacetic acid solutions Journal of Materials Research and Technology |
| title | Dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| title_full | Dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| title_fullStr | Dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| title_full_unstemmed | Dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| title_short | Dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| title_sort | dissolution kinetics of hemimorphite in trichloroacetic acid solutions |
| url | http://www.sciencedirect.com/science/article/pii/S2238785418306938 |
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