Adsorption properties of micropollutants amino acids on metallic organic framework HKUST-1 in aqueous system
LU Si-jia1, MA Xiao-yan1, LI Qing-song2, SONG Ya-li3, YU Qi1, ZHU Li-dan1
1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;
2. Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen 361005, China;
3. School of Civil Enginneering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
The metal organic framework HKUST-1 was prepared by solvothermal method. The tyrosine (Tyr), phenylalanine (phe) and tryptophan (Tyr) which were detected frequently in water source were selected as the targets, and their adsorption on HKUST-1 was investigated. The adsorbent characteristic of HKUST-1was analyzed by XRD and FTIR techniques. The adsorption mechanism of amino acids on HKUST-1 was investigated by adsorption kinetics, isotherms and thermodynamics. HKUST-1 had high crystallinity and good removal effects on tyrosine, phenylalanine and tryptophan, saturated adsorption capacity was up to 248.65,143.67 and 140.09mg/g; the adsorption process was in accordance with the Langmuir adsorption isotherm model and the Lagergren quasi-secondary kinetic model; adsorption thermodynamics results showed that HKUST-1 removed amino acids as an endothermic reaction; high adsorption capacity was mainly attributed to electrostatic interaction, hydrogen bonding and π-π interaction.
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