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The adsorption of phosphate ions and oleate ions onto CO32- defects on dolomite (104) surface was studied by using density functional theory (DFT) calculation. The results showed that the CO32- defects that were generated due to dolomite dissolution led to the enhancement of the activity of metal atoms on the surface, which was beneficial to the interaction between anions and mineral surface. The adsorption energies of H2PO4- onto calcium atoms on the ideal dolomite surface and the defective dolomite surface were calculated to be -183.30 kJ/mol and -561.24 kJ/mol, respectively. Based on the calculation of density of states, it was found that after adsorption of H2PO4- onto the calcium atoms on the surface of defective dolomite, the adjacent magnesium atoms still had strong activity, and the adsorption energies of oleate ions onto the magnesium atoms on the surfaces of the ideal dolomite and defective dolomite were -52.29 kJ/mol and -489.43 kJ/mol, respectively. Phosphoric acid ions and oleic acid ions were adsorbed together on the surface of dolomite, resulting in the floating of dolomite.

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采用密度泛函理论(DFT)计算,研究了磷酸根离子/油酸根离子在白云石(104)表面CO32-缺陷处的吸附。结果表明,白云石溶解产生CO32-缺陷导致表面金属原子活性增强,有利于阴离子与矿物表面相互作用。H2PO4-在理想白云石表面、缺陷白云石表面与钙原子的吸附能分别为-183.30 kJ/mol、-561.24 kJ/mol。态密度计算结果表明,H2PO4-与缺陷白云石表面钙原子吸附后,相邻镁原子仍具有较强活性,油酸根离子在理想白云石表面、缺陷白云石表面与镁原子的吸附能分别为-52.29 kJ/mol、-489.43 kJ/mol。磷酸和油酸离子可以共同吸附在白云石表面,导致白云石上浮。

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卯松(1983—),男,贵州毕节人,硕士,高级实验师,主要从事难选矿石选矿及资源综合利用研究。

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卯松(1983—),男,贵州毕节人,硕士,高级实验师,主要从事难选矿石选矿及资源综合利用研究。

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卯松(1983—),男,贵州毕节人,硕士,高级实验师,主要从事难选矿石选矿及资源综合利用研究。

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基于密度泛函理论的含CO32-缺陷白云石表面性质研究
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卯松 1, 2, 3 , 章铁斌 1, 2, 3
矿冶工程杂志 | 选矿 2023,43(2): 66-68
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矿冶工程杂志 | 选矿 2023, 43(2): 66-68
基于密度泛函理论的含CO32-缺陷白云石表面性质研究
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卯松1, 2, 3, 章铁斌1, 2, 3
作者信息
  • 1.贵州大学,贵州 贵阳 550025
  • 2.喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州 贵阳 550025
  • 3.贵州省非金属矿产资源综合利用重点实验室,贵州 贵阳 550025
  • 卯松(1983—),男,贵州毕节人,硕士,高级实验师,主要从事难选矿石选矿及资源综合利用研究。

Study on Surface Properties of Dolomite with CO32- Defects Based on Density Functional Theory
Song MAO1, 2, 3, Tiebin ZHANG1, 2, 3
Affiliations
  • 1.Guizhou University, Guiyang 550025, Guizhou, China
  • 2.National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, Guizhou, China
  • 3.Guizhou Key Laboratory of Comprehensive Utilization of No-metallic Mineral Resources, Guiyang 550025, Guizhou, China
出版时间: 2023-04-01 doi: 10.3969/j.issn.0253-6099.2023.02.015
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采用密度泛函理论(DFT)计算,研究了磷酸根离子/油酸根离子在白云石(104)表面CO32-缺陷处的吸附。结果表明,白云石溶解产生CO32-缺陷导致表面金属原子活性增强,有利于阴离子与矿物表面相互作用。H2PO4-在理想白云石表面、缺陷白云石表面与钙原子的吸附能分别为-183.30 kJ/mol、-561.24 kJ/mol。态密度计算结果表明,H2PO4-与缺陷白云石表面钙原子吸附后,相邻镁原子仍具有较强活性,油酸根离子在理想白云石表面、缺陷白云石表面与镁原子的吸附能分别为-52.29 kJ/mol、-489.43 kJ/mol。磷酸和油酸离子可以共同吸附在白云石表面,导致白云石上浮。

磷矿  /  白云石  /  晶格缺陷  /  吸附能  /  态密度  /  密度泛函理论

The adsorption of phosphate ions and oleate ions onto CO32- defects on dolomite (104) surface was studied by using density functional theory (DFT) calculation. The results showed that the CO32- defects that were generated due to dolomite dissolution led to the enhancement of the activity of metal atoms on the surface, which was beneficial to the interaction between anions and mineral surface. The adsorption energies of H2PO4- onto calcium atoms on the ideal dolomite surface and the defective dolomite surface were calculated to be -183.30 kJ/mol and -561.24 kJ/mol, respectively. Based on the calculation of density of states, it was found that after adsorption of H2PO4- onto the calcium atoms on the surface of defective dolomite, the adjacent magnesium atoms still had strong activity, and the adsorption energies of oleate ions onto the magnesium atoms on the surfaces of the ideal dolomite and defective dolomite were -52.29 kJ/mol and -489.43 kJ/mol, respectively. Phosphoric acid ions and oleic acid ions were adsorbed together on the surface of dolomite, resulting in the floating of dolomite.

phosphorite  /  dolomite  /  lattice defect  /  adsorption energy  /  density of states  /  density functional theory (DFT)
卯松, 章铁斌. 基于密度泛函理论的含CO32-缺陷白云石表面性质研究. 矿冶工程杂志, 2023 , 43 (2) : 66 -68 . DOI: 10.3969/j.issn.0253-6099.2023.02.015
Song MAO, Tiebin ZHANG. Study on Surface Properties of Dolomite with CO32- Defects Based on Density Functional Theory[J]. Mining and Metallurgical Engineering, 2023 , 43 (2) : 66 -68 . DOI: 10.3969/j.issn.0253-6099.2023.02.015
  • 中低品位磷矿及其共伴生资源高效利用国家重点实验室开放基金(WFKF2019-06)
2023年第43卷第2期
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doi: 10.3969/j.issn.0253-6099.2023.02.015
  • 接收时间:2022-10-16
  • 首发时间:2026-03-05
  • 出版时间:2023-04-01
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  • 收稿日期:2022-10-16
基金
中低品位磷矿及其共伴生资源高效利用国家重点实验室开放基金(WFKF2019-06)
作者信息
    1.贵州大学,贵州 贵阳 550025
    2.喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州 贵阳 550025
    3.贵州省非金属矿产资源综合利用重点实验室,贵州 贵阳 550025
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

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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