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Optimization of Fluorine Removal Process Conditions by Lanthanum Chloride Precipitation Method Based on Thermodynamic Analysis
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Hao TIAN1, 2, Yu PEI2, Yufeng BAI1, Jincheng GUO2, Ruihua GUO1, Xihong HAO1
Hydrometallurgy of China | 2026, 45(3) : 423 - 430
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Hydrometallurgy of China | 2026, 45(3): 423-430
• Experiment Research •
Optimization of Fluorine Removal Process Conditions by Lanthanum Chloride Precipitation Method Based on Thermodynamic Analysis
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Hao TIAN1, 2, Yu PEI2, Yufeng BAI1, Jincheng GUO2, Ruihua GUO1, Xihong HAO1
Affiliations
  • 1.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou　014010, China
  • 2.State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earth, Baotou　014030, China
Published: 2026-06-20 doi: 10.13355/j.cnki.sfyj.2026.03.018
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In order to solve the problem of fluorine-containing water pollution, lanthanum chloride precipitation method was used to remove fluorine from it. Through in-depth analysis of the chemical characteristics and thermodynamic reaction mechanism of the solution, the interaction between La3+ and F- in aqueous solution was revealed. The effects of initial pH of the solution, the amount of lanthanum chloride, reaction temperature and time on the removal of fluoride were investigated by single factor test, and the optimized process parameters were determined. The results show that for the fluorine-containing simulated solution with fluorine ion mass concentration of 0.1－1.0 g/L, under the conditions of initial solution pH of 3.0, lanthanum chloride dosage of 1.3 times of the theoretical amount, reaction temperature of 50 ℃ and reaction time of 10 min, the fluorine removal rate is more than 95%, and the residual fluorine ion mass concentration in the liquid after fluorine removal is less than 30 mg/L, which meets the fluoride emission limit specified in the national standard. The method has good process applicability in a wide range of fluorine concentration and has certain application value.

fluorine-containing wastewater  /  lanthanum chloride  /  precipitation method  /  removal  /  fluorine  /  thermodynamics
Hao TIAN, Yu PEI, Yufeng BAI, Jincheng GUO, Ruihua GUO, Xihong HAO. Optimization of Fluorine Removal Process Conditions by Lanthanum Chloride Precipitation Method Based on Thermodynamic Analysis[J]. Hydrometallurgy of China, 2026 , 45 (3) : 423 -430 . DOI: 10.13355/j.cnki.sfyj.2026.03.018
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Year 2026 volume 45 Issue 3
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Article Info
doi: 10.13355/j.cnki.sfyj.2026.03.018
  • Receive Date：2026-01-07
  • Online Date：2026-09-11
  • Published：2026-06-20
Article Data
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History
  • Received：2026-01-07
  • Revised：2026-02-03
Funding
Affiliations
    1.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou　014010, China
    2.State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earth, Baotou　014030, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
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Percentage of
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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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