Green synthesis of zirconium-based metal organic frameworks and their adsorption performance on dye wastewater
Most conventional zirconium(Zr)-based metal organic frameworks(MOFs)use toxic ligands and solvents,which introduce new contaminants while removing them.MIP-202,a Zr-based MOFs material with L-aspartic acid(LA)as ligand,was synthesized by hydrothermal method in order to develop a green and environmentally friendly adsorbent with excellent adsorption performance and recyclability.The effects of pH,adsorption time,temperature and co-existing ions on the adsorption performance of MIP-202 were investigated using methylene blue(MB)as the removal target,kinetic and thermodynamic parameters were fitted,and the recycling performance and practical application of the adsorbent were investigated.The results show that:the adsorption capacity increases with pH;the adsorption process is exothermic and follows pseudo-second kinetics and Langmuir adsorption isotherm with a maximum adsorption capacity of 192.31 mg/g;the adsorption performance is less affected by coexisting ions;the adsorption capacity is still 85.10％of the initial adsorption capacity after 5 cycles.The model textile effluent experiment shows the practical application of this adsorbent.
metal organic frameworkhydrothermal methodL-aspartic acidmethylene blueadsorption propertygreen synthesis
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万方数据
维普
