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Distribution of Residual Leaching Agent and Main Co-existing Ions in Weathered Crust Elution Deposited Rare Earth Tailings
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Xiaoju LI1, 2, Junxia YU1, 2, Rong WANG1, Ze OUYANG1, Yang LIU1, Qingzi HU1, Shiyu CHEN1, Fang ZHOU2, Ru'an CHI2
Mining and Metallurgical Engineering | 2023, 43(4) : 103 - 109
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Mining and Metallurgical Engineering | 2023, 43(4): 103-109
• METALLURGY •
Distribution of Residual Leaching Agent and Main Co-existing Ions in Weathered Crust Elution Deposited Rare Earth Tailings
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Xiaoju LI1, 2, Junxia YU1, 2, Rong WANG1, Ze OUYANG1, Yang LIU1, Qingzi HU1, Shiyu CHEN1, Fang ZHOU2, Ru'an CHI2
Affiliations
  • 1.School of Chemical and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430200, Hubei, China
  • 2.Xingfa Mining College, Wuhan Institute of Technology, Wuhan 430000, Hubei, China
Published: 2023-08-01 doi: 10.3969/j.issn.0253-6099.2023.04.023
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After an in-situ leaching of weathered crust elution-deposited rare earth ores with ammonium sulfate, the obtained tailings were taken to explore the variation of water content, pH value, Zeta potential with sampling depth, and then the total nitrogen content, nitric nitrogen, ammonium nitrogen and the main co-existing ions were also analyzed. The results indicate that the tailings samples were all acidic, and both water content and Zeta potential decreased with increasing of sampling depth. The residual ammonium salt in the ore body mainly exists in the form of water-soluble ammonium (11%-33%), and ion-exchange ammonium (59%-87%) in ammonium nitrogen, presenting the highest content in middle layer and the lowest content in surface layer. XRD analysis reveals that the content of clay minerals in the rare earth tailings positively correlated with the content of residual ammonium. In addition, high content of organic matter in the surface layer of the ore body leads to the highest content of co-existing cations Al3+ and RE3+ in the surface layer; while as for the ore body at deeper position, the content of co-existing cations Al3+ and RE3+ decreases obviously, and the co-existing anions SO42- and Cl- present an opposite variation trend.

leaching agent  /  removal of ammonia and nitrogen  /  ammonia sulfate  /  in-situ leaching  /  rare earth  /  rare earth tailings  /  residual ammonium  /  ions distribution law  /  environmental pollution
Xiaoju LI, Junxia YU, Rong WANG, Ze OUYANG, Yang LIU, Qingzi HU, Shiyu CHEN, Fang ZHOU, Ru'an CHI. Distribution of Residual Leaching Agent and Main Co-existing Ions in Weathered Crust Elution Deposited Rare Earth Tailings[J]. Mining and Metallurgical Engineering, 2023 , 43 (4) : 103 -109 . DOI: 10.3969/j.issn.0253-6099.2023.04.023
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Year 2023 volume 43 Issue 4
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.04.023
  • Receive Date：2023-02-06
  • Online Date：2026-03-05
  • Published：2023-08-01
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  • Received：2023-02-06
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    1.School of Chemical and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430200, Hubei, China
    2.Xingfa Mining College, Wuhan Institute of Technology, Wuhan 430000, Hubei, 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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