Modification of UiO-66-NH2 and adsorption properties of Cu2+
The UiO-66-NH2 material,a zirconium-based metal-organic framework,was synthesized through solvothermal method.Subsequently,dopamine was employed for post-synthetic modification,leading to the preparation of UiO-66-NH2/PDA composite material for the removal of heavy metal copper ions.The investigation into the effects of initial pH,initial concentration,contact time,and temperature on the adsorption process revealed that the adsorption kinetics and isotherm data of Cu2+adhered to the pseudo-second-order and Langmuir models,respectively,and the adsorption process was a spontaneous endothermic reaction.Initialρ(Cu2+)=50 mg/L,pH=5.5,the removal rate within 30 min was 93％.
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