Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests
In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water lea...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/10/889 |
| _version_ | 1797551551396446208 |
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| author | Xiaojun Wang Hao Wang Can Sui Lingbo Zhou Xiao Feng Chengguang Huang Kui Zhao Wen Zhong Kaijian Hu |
| author_facet | Xiaojun Wang Hao Wang Can Sui Lingbo Zhou Xiao Feng Chengguang Huang Kui Zhao Wen Zhong Kaijian Hu |
| author_sort | Xiaojun Wang |
| collection | DOAJ |
| description | In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water leaching test, the permeability coefficient of the rare earth ore sample leached by the ammonium sulfate solution gradually decreases at the beginning and then increases with the completion of leaching. The physical and morphological evolutions of rare earth ore samples in this comparative experiment are also monitored by nuclear magnetic resonance and scanning electron microscopy. It is concluded that the change in the permeability coefficient arises from the adsorption–desorption of a large number of clay microparticles, resulting in a dynamic evolution of pore structures. Further mechanism analysis suggests that the change in internal ionic strength caused by ion exchange and leaching solution seepage promotes the adsorption–desorption behavior of clay microparticles. |
| first_indexed | 2024-03-10T15:47:45Z |
| format | Article |
| id | doaj.art-4ef4d0a7ee854434b5aef0a8c0bd3970 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T15:47:45Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-4ef4d0a7ee854434b5aef0a8c0bd39702023-11-20T16:19:08ZengMDPI AGMinerals2075-163X2020-10-01101088910.3390/min10100889Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching TestsXiaojun Wang0Hao Wang1Can Sui2Lingbo Zhou3Xiao Feng4Chengguang Huang5Kui Zhao6Wen Zhong7Kaijian Hu8Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaIn order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water leaching test, the permeability coefficient of the rare earth ore sample leached by the ammonium sulfate solution gradually decreases at the beginning and then increases with the completion of leaching. The physical and morphological evolutions of rare earth ore samples in this comparative experiment are also monitored by nuclear magnetic resonance and scanning electron microscopy. It is concluded that the change in the permeability coefficient arises from the adsorption–desorption of a large number of clay microparticles, resulting in a dynamic evolution of pore structures. Further mechanism analysis suggests that the change in internal ionic strength caused by ion exchange and leaching solution seepage promotes the adsorption–desorption behavior of clay microparticles.https://www.mdpi.com/2075-163X/10/10/889permeabilityadsorption–desorptionrare earthion exchangeleaching |
| spellingShingle | Xiaojun Wang Hao Wang Can Sui Lingbo Zhou Xiao Feng Chengguang Huang Kui Zhao Wen Zhong Kaijian Hu Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests Minerals permeability adsorption–desorption rare earth ion exchange leaching |
| title | Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests |
| title_full | Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests |
| title_fullStr | Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests |
| title_full_unstemmed | Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests |
| title_short | Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests |
| title_sort | permeability and adsorption desorption behavior of rare earth in laboratory leaching tests |
| topic | permeability adsorption–desorption rare earth ion exchange leaching |
| url | https://www.mdpi.com/2075-163X/10/10/889 |
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