The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid
In this study, the effect of citric acid on iron leaching from titanium gypsum (TiG) was systematically investigated. The conditions for the leaching of valuable metals were optimized while varying such parameters as the leaching time, citric acid mass fraction, leaching temperature, and the liquid–...
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/3/952 |
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| author | Yan Lin Hongjuan Sun Tongjiang Peng Dingran Zhao Xiyue Zhang |
| author_facet | Yan Lin Hongjuan Sun Tongjiang Peng Dingran Zhao Xiyue Zhang |
| author_sort | Yan Lin |
| collection | DOAJ |
| description | In this study, the effect of citric acid on iron leaching from titanium gypsum (TiG) was systematically investigated. The conditions for the leaching of valuable metals were optimized while varying such parameters as the leaching time, citric acid mass fraction, leaching temperature, and the liquid–solid ratio. It was found that under the conditions of a citric acid mass fraction of 10%, at a 80 °C leaching temperature, a leaching duration of 80–90 min and a liquid–solid ratio of 8, the whiteness of titanium gypsum (TiG) increased from 8.1 to 36.5, and the leaching efficiencies of iron reached 84.37%. The kinetic analysis indicated that the leaching process of iron from TiG was controlled by the reaction product layer from 0–20 min, while the leaching process of iron from TiG was controlled by internal diffusion from 20–90 min. The apparent activation energy of the leaching reactions was 33.91 kJ/mol and 16.59 kJ/mol, respectively. High-value-added calcium oxalate and ferrous oxalate were prepared from the calcium and iron in the filtrate of the oxalic acid extraction. The leaching liquid could be recycled, which will provide a new way to utilize titanium gypsum. |
| first_indexed | 2024-03-11T09:34:55Z |
| format | Article |
| id | doaj.art-f72ac92ed53048bf98a16807c5a0b846 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T09:34:55Z |
| publishDate | 2023-01-01 |
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| record_format | Article |
| series | Molecules |
| spelling | doaj.art-f72ac92ed53048bf98a16807c5a0b8462023-11-16T17:25:30ZengMDPI AGMolecules1420-30492023-01-0128395210.3390/molecules28030952The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching LiquidYan Lin0Hongjuan Sun1Tongjiang Peng2Dingran Zhao3Xiyue Zhang4Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, ChinaIn this study, the effect of citric acid on iron leaching from titanium gypsum (TiG) was systematically investigated. The conditions for the leaching of valuable metals were optimized while varying such parameters as the leaching time, citric acid mass fraction, leaching temperature, and the liquid–solid ratio. It was found that under the conditions of a citric acid mass fraction of 10%, at a 80 °C leaching temperature, a leaching duration of 80–90 min and a liquid–solid ratio of 8, the whiteness of titanium gypsum (TiG) increased from 8.1 to 36.5, and the leaching efficiencies of iron reached 84.37%. The kinetic analysis indicated that the leaching process of iron from TiG was controlled by the reaction product layer from 0–20 min, while the leaching process of iron from TiG was controlled by internal diffusion from 20–90 min. The apparent activation energy of the leaching reactions was 33.91 kJ/mol and 16.59 kJ/mol, respectively. High-value-added calcium oxalate and ferrous oxalate were prepared from the calcium and iron in the filtrate of the oxalic acid extraction. The leaching liquid could be recycled, which will provide a new way to utilize titanium gypsum.https://www.mdpi.com/1420-3049/28/3/952titanium gypsumcalcium oxalateferrous oxalateferric hydroxideiron removal rate |
| spellingShingle | Yan Lin Hongjuan Sun Tongjiang Peng Dingran Zhao Xiyue Zhang The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid Molecules titanium gypsum calcium oxalate ferrous oxalate ferric hydroxide iron removal rate |
| title | The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid |
| title_full | The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid |
| title_fullStr | The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid |
| title_full_unstemmed | The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid |
| title_short | The Leaching Kinetics of Iron from Titanium Gypsum in a Citric Acid Medium and Obtain Materials by Leaching Liquid |
| title_sort | leaching kinetics of iron from titanium gypsum in a citric acid medium and obtain materials by leaching liquid |
| topic | titanium gypsum calcium oxalate ferrous oxalate ferric hydroxide iron removal rate |
| url | https://www.mdpi.com/1420-3049/28/3/952 |
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