Study On Preparation Of Mof/macroporous Resin Composite Materialand Its Deep Purification Of Wastewater

As the economic and social development of water pollution is more serious,the current water pollution exhibits some new features,such as typical organic dyes,pesticides and medicines,for their potential for ecological sustainability and human health.There is a negative impact,there are many ways to remove water pollutants,and the adsorption method is favored by its good removal effect,so it is necessary to prepare an efficient and rapid adsorption material.Although there is a wide variety of adsorption materials,it has a very important impact on the adsorption effect of the absorption site and three-dimensional structure,so MOF is more concerned by its good metal site and three-dimensional stereo structure,but MOF material The particle diameter is more than the micrometer,the adsorption is difficult to separate,and the pressure drop is large when the filler is used as the filler device,and the degree of diffusion is slow in the adsorption process,the adsorption kinetics is poor,and The stability of the MOF material in the aqueous phase is poor.In order to solve the above problems in which the MOF is present,it has high mechanical,chemical stability,and excellent hydraulic performance,and can be pre-enriched by ion exchange of the quaternine group.Target ion.Therefore,this study enhances the hydraulic/adsorption kinetics of the material to improve the hydraulic/adsorption kinetics of the material,the adsorption amount and adsorption rate of the material,and the adsorption rate of the absence of wastewater depth purification is constructed.,stabilize the adsorption material.In order to protect the ion group in the D201 resin,the UIO-66,ZIF-67 and MIL-53three MOF were introduced into the resin using a relatively gentle hydrothermal method,and the UIO-66/D201 was synthesized in its internal position.ZIF-67/D201 and MIL-53/D201 three composites,using X-ray diffraction(XRD),Fourier converted infrared spectroscopy(FTIR),scanning electron microscope(SEM),energy scattering spectrum(EDS)and ratios The surface area is characterized by the characterization of the porosity analyzer(BET)to characterize the crystal shapes and basic structures of the three composites;in order to investigate the UIO-66/D201,ZIF-67/D201,MIL-53/D201 three composite materials The adsorption effect,adsorption experiments in Aloccorin sodium and sodium hydroxyethylene sodium.Because the amount of composite is closely related to the removal rate,the influence of the investment amount to the composite material as the adsorbent is first examined.At the same time,because the p H affects the presence of the composite in the water body,therefore,the adsorption efficiency of the composite material under different acid-base environments was investigated;And because the matrix effect of the water body is more complicated,it may compete with the target of the target,so different ions(Cl^-,SO₄^2-,Si O₃^2-)on the adsorption efficiency are investigated.influences.The three composites of UIO-66/D201,ZIF-67/D201,MIL-53/D201 were respectively adsorbed by adsorption kinetics and thermodynamics,respectively,and fitted to obtain associated thermodynamics parameters,and the results showed:The results of XRD,FTIR,SEM,and EDS have shown that three composites have been successfully prepared.The results of adsorption experiment showed that the adsorption of UIO-66/D201 on sodium Allowlin and sodium hydroxyethate can achieve more ideal removal effect when the amount is 0.5 g/L,and the removal rate is 91.1%,respectively.90.7%;ZIF-67/D201 to Allowlin sodium adsorption can achieve a relatively ideal removal effect when the amount is 0.5 g/L,and its removal rate is 89.56%;MIL-53/D201 to hydroxyethyl phosphine The adsorption of sodium sodium is also a more desirable adsorption effect when the amount is 0.5 g/L,which is 83.2%.Compare the UIO-66/D201 than ZIF-67/D201 to the sodium Allowlin sodium adsorption effect,UIO-66/D201 is better than MIL-53/D201 to the sodium hydroxyethate of hydroxyethate.Since the composite material has different presence in different p H values,the UIO-66/D201 is obtained with the result of decreased the removal rate of sodium Allowlin with p H,and the removal rate is the highest at 3 when the p H is 3.The p H is 11,the removal rate is the lowest;the adsorption effect of the sodium Arooxilin decreases with the increase of p H,and the effect is best in the p H of 3,and the effect is the most in the p H of 11;MIL-53/D201 is lowered by the increase of sodium hydroxyethate,and the removal rate is the highest when the p H is 3,the removal rate is the lowest,and the above two composite is compared.The material is more obvious in p H=11.When there is Cl^-,SO₄^2-,Si O₃^2-in the adsorption solution,the adsorption effect of the composite is exhibited with a large difference,and Cl^-of the three ions has the greatest impact on the removal rate of the material.The presence of Cl^-reduces the removal rate of UIO-66/D201,ZIF-67/D201 and MIL-53/D201 from 91.1%,89.56%and 83.2%to 79.48%,79.94%and73.2%.Through thermodynamic experiments,the maximum saturation adsorption amount of UIO-66/D201 on sodium Allowlin and sodium hydroxyethate is 142.5 mg/g and 142.5mg/g,ZIF-67/D201 to Aloveilin.The maximum saturated adsorption amount of sodium was 137.1 mg/g,and the maximum saturated adsorption amount of MIL-53/D201 on sodium hydroxyethate was 122.3 mg/g,the adsorption kinetics of UIO-66/D201 and MIL-53/D201 and The thermodynamic model is compliant with the secondary kinetics and the langmuir adsorption model,that is,the ZIF-67/D201 is in line with the secondary kinetics and the Freundlich adsorption model,ie chemical adsorption and multi-layer.Adsorption is main.