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  

Kinetics and Thermodynamics of Oleate Ion Adsorption on Fluorapatite and Dolomite

作　　者：张景奇 张覃 卯松[1,3,4] ZHANG Jingqi;ZHANG Qin;MAO Song(Mining College,Guizhou University,Guiyang 550025,Guizhou,China;Guizhou Academy of Sciences,Guiyang 550001,Guizhou,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,Guizhou,China;Guizhou Key Lab of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州科学院,贵州贵阳550001 [3]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 [4]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025

出　　处：《矿冶工程》2024年第1期60-67,共8页Mining and Metallurgical Engineering

基　　金：国家重点研发计划项目(2018YFE0110300);贵州省科技计划项目(黔科合平台人才[2020]4105)。

摘　　要：采用TOC测量以及分子模拟方法研究了油酸根离子在氟磷灰石和白云石表面的吸附动力学以及吸附热力学。吸附动力学研究结果表明,以HEDP为抑制剂时,油酸根离子在氟磷灰石和白云石表面的吸附符合准二级动力学模型,油酸根离子在氟磷灰石表面的吸附速率大于在白云石表面的吸附速率。吸附热力学研究结果表明,油酸根离子在氟磷灰石和白云石孔径内和氟磷灰石(001)面以及白云石(104)面的吸附都接近Langmuir模型。相同比表面积条件下,油酸根离子在白云石表面的吸附量高于在氟磷灰石表面的吸附量,表明单位表面积内,白云石表面比氟磷灰石表面具有更多的活性位点。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.

关 键 词：氟磷灰石 白云石 吸附动力学 吸附热力学 孔隙 

分 类 号：TD97[矿业工程—选矿]