Adsorption Mechanism of Amidoxime Collector on the Flotation of Lepidolite: Experiment and DFT Calculation

被引:12
作者
Huang, Zhiqiang [1 ]
Li, Wenyuan [1 ]
He, Guichun [1 ]
Shen, Louyan [2 ]
Chen, Xiaoai [2 ]
Shuai, Shuyi [1 ]
Li, Fangxu [3 ]
Wang, Hongling [3 ]
Liu, Rukuan [4 ]
Zhang, Shiyong [1 ]
Cheng, Chen [1 ]
Ouyang, Liaoyuan [1 ]
Yu, Xinyang [1 ]
Fu, Weng [5 ]
机构
[1] Jiangxi Univ Sci & Technol, Jiangxi Prov Key Lab Min Engn, Ganzhou 34100, Jiangxi, Peoples R China
[2] China Nerin Engn Co Ltd, Nanchang 330031, Jiangxi, Peoples R China
[3] Guangdong Inst Resources Comprehens Utilizat, Guangzhou 510650, Peoples R China
[4] Hunan Acad Forestry, Changsha 410004, Hunan, Peoples R China
[5] Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia
基金
中国国家自然科学基金;
关键词
PERFORMANCE; MALACHITE; AMINE;
D O I
10.1021/acs.langmuir.2c02821
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Lepidolite is an important mineral resource of lithium. With the increase in awareness of low-carbon and green travel, the demand for lithium has increased dramatically. Therefore, how to increase the output of lithium has to turn into high precedence. In this paper, amidoxime (DPA) was synthesized and used for the efficient collection of lepidolite. Dodecylamine (DA), a commonly used collector of lepidolite ore, was used for comparison. The collecting performances of DA and DPA for lepidolite were studied by the micro-flotation experiment, and the adsorption mechanism of DPA on lepidolite was verified by contact angle, zeta potential tests, FTIR spectra, and density functional theory (DFT) calculations. The results of flotation experiments showed that at the same collector dosage (3 x 10-4 mol/L), the recovery of lepidolite could reach 90%, while the recovery of lepidolite with DA was only 52.5%, and to achieve the maximum recovery of DA (77.5%), only half of the DPA was added. The contact angle test results showed that DPA could effectively improve the hydrophobicity of lepidolite than DA. FTIR spectra and zeta potential tests suggested that DPA molecules were adsorbed on the lepidolite surface by electrostatic attraction. DFT calculations revealed that DPA reacted with the nucleophilic reagent (lepidolite) by the reactive site of the -CH2NH(CH2)2C(NOH)N+H3 group and more easily absorbed on the surface of lepidolite than DA. Therefore, our new finding will provide an important prospect for the sustainable development and utilization of lithium resources.
引用
收藏
页码:15858 / 15865
页数:8
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