Kinetics and Thermodynamics of Oleate Ion Adsorption on Fluorapatite and Dolomite
ZHANG Jingqi1, ZHANG Qin2,3,4, MAO Song1,3,4
1.Mining College, Guizhou University, Guiyang 550025, Guizhou, China;
2.Guizhou Academy of Sciences, Guiyang 550001, Guizhou, China;
3.National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, Guizhou, China;
4.Guizhou Key Lab of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, Guizhou, China
Abstract：The kinetics and thermodynamics of oleate ion adsorption on the surface of fluorapatite and dolomite were studied by adopting TOC measurement and molecular simulation. The study on kinetics of adsorption shows that with HEDP as the depressant, the adsorption rate of oleate ions on fluorapatite is greater than on dolomite, and the adsorption on both minerals conforms to the quasi-second-order kinetic model. Furthermore, according to the study on adsorption thermodynamics, the characteristics of oleate ion adsorption on the inner pore surface of both fluorapatite and dolomite, on (001) surface of fluorapatite and (104) surface of dolomite nearly conform to Langmuir model. For identical specific surface area, the adsorption amount of oleate ions on dolomite is higher than that on fluorapatite, indicating that there are more active sites per unit surface area on dolomite than on fluorapatite.
张景奇, 张覃, 卯松. 油酸根离子在氟磷灰石和白云石表面吸附动力学与吸附热力学研究[J]. 矿冶工程, 2024, 44(1): 60-67.
ZHANG Jingqi, ZHANG Qin, MAO Song. Kinetics and Thermodynamics of Oleate Ion Adsorption on Fluorapatite and Dolomite. Mining and Metallurgical Engineering, 2024, 44(1): 60-67.
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