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Adsorption Mechanism of Lanthanum and Ammonium Ions on Kaolinite
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Zhiqiang ZOU1, 2, Lijinhong HUANG3, Xindong LI4, Wengang XIAO2, Yantao QIAN2, Wanfu HUANG1
Mining and Metallurgical Engineering | 2023, 43(4) : 52 - 56
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Mining and Metallurgical Engineering | 2023, 43(4): 52-56
• MINERAL PROCESSING •
Adsorption Mechanism of Lanthanum and Ammonium Ions on Kaolinite
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Zhiqiang ZOU1, 2, Lijinhong HUANG3, Xindong LI4, Wengang XIAO2, Yantao QIAN2, Wanfu HUANG1
Affiliations
  • 1.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 2.Ganzhou Rare Earth Mining Co Ltd, Ganzhou 341000, Jiangxi, China
  • 3.School of Architecture and Design, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 4.School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
Published: 2023-08-01 doi: 10.3969/j.issn.0253-6099.2023.04.011
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The adsorption mechanism of La3+ and NH4+ ions on (001) and (00-1) planes of kaolinite has been studied based on the first-principle calculation of plane-wave pseudopotentials of density functional theory. The results show that La3+ ions are mainly adsorbed on kaolinite surface through electrostatic interaction, while NH4+ ions are adsorbed thereon through both electrostatic interaction and hydrogen bonding, with more electrons transferred onto kaolinite surface than La3+. The absolute values of adsorption energy for ions on (001) plane of kaolinite are in the following descending order: La3+ > NH4+ > H2O, while on (00-1) plane in the following descending order: NH4+ > La3+ > H2O. It is found that La3+ ions are prone to be adsorbed on (001) plane, while NH4+ ions are prone to be adsorbed on (00-1) plane. When ammonium sulfate is used as a leaching agent, rare earth ions like La3+ adsorbed on the (001) plane can only be effectively displaced with the leaching agent at a certain concentration.

ion-adsorbed REE deposit  /  rare earth  /  in-situ leaching  /  lanthanum ions  /  ammonium ions  /  kaolinite  /  adsorption  /  density functional theory
Zhiqiang ZOU, Lijinhong HUANG, Xindong LI, Wengang XIAO, Yantao QIAN, Wanfu HUANG. Adsorption Mechanism of Lanthanum and Ammonium Ions on Kaolinite[J]. Mining and Metallurgical Engineering, 2023 , 43 (4) : 52 -56 . DOI: 10.3969/j.issn.0253-6099.2023.04.011
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doi: 10.3969/j.issn.0253-6099.2023.04.011
  • Receive Date：2023-03-11
  • Online Date：2026-03-05
  • Published：2023-08-01
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  • Received：2023-03-11
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Affiliations
    1.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2.Ganzhou Rare Earth Mining Co Ltd, Ganzhou 341000, Jiangxi, China
    3.School of Architecture and Design, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    4.School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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