Citation: Jinyun Zhao, Jiapeng Hu, Ruilai Liu, Hao Lin, Xingping Fu. Fabrication of La-MOFs Adsorbents and Its Fluorine Removal Performance[J]. Chemistry, ;2021, 84(1): 75-80. shu

Fabrication of La-MOFs Adsorbents and Its Fluorine Removal Performance

Fujian Provincial Key laboratory of Eco-Industrial Green Technology, College of Ecological and Resources Engineering, Wuyi University, Wuyishan, 354300

Corresponding author: Jiapeng Hu, 22402414@qq.com
Received Date: 14 July 2020
Accepted Date: 19 August 2020

Figures(7)

La-MOFs adsorbents were fabricated by hydrothermal method, and the structure and morphology of prepared La-MOFs adsorbents were analyzed by scanning electron microscope, fourier transform infrared spectroscopy, X-ray powder diffraction and N₂ adsorption-desorption isotherms. The La-MOFs adsorbents were woolen spherical structure with the most pore size of 15.84 nm and specific surface area of 16.95 m²/g and lanthanum fluoride crystals were formed after adsorption of fluoride ions. The effects of parameters, such as mass ratio of lanthanum nitrate and 2-aminoterephthalic acid, reaction temperature and time, etc. on fluoride adsorption by the La-MOFs adsorbents were investigated. When LN/AA=4:3, DMF reaction temperature 130℃, reaction time 24 h and methanol reaction temperature 120℃, the adsorption capacity of La-MOFs reaches the maximum value of 43.1 mg/g. The pseudo-second-order has been found suitable for describing the kinetics process of the fluoride ions absorption on the La-MOFs adsorbent while the net rate can thus be sequentially controlled in a multi-stage condition. The fitness of adsorption data by Freundlich model was superior to Langmuir model. The adsorption process is an exothermic reaction, and increasing the temperature is beneficial to the adsorption process.
- MOFs materials,
- Defluorination,
- Adsorbent,
- Dynamics,
- Thermodynamics
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