Study Of Adsorption Behavior Of Rutin Adsorbed On Macroporous Adsorption Resin

In this work, Rutin, a flavonoid compound, was used as the adsorbate, and UV spectrophotometer as testing method, to investigate the adsorption feature and adsorption selectivity of macroporous adsorption resin (MARs), and the results of this work was following:1.Rutin was adopted as adsorbate, and the primary adsorption experiment of Rutin solution on different types of macroporous resin was investigated by determined the concentration of the Rutin solution before and after the adsorption of various macroporous resin,the credibility activation method and activation time of macroporous resins, the operation of adsorption experiment, and the best dosage of macroporous resins was investigated, and the optimal results were presented as follows:1) the optimal resin activation time was 5 d, resins should be immersed by 95% ethanol before adsorption, the appropriate dosage of resin was 1.00000 g and heavy objects for adsorption experiment was identified as glass beads.2) In the synthetic process, because of different degrees of polymerization process, resin particles presented different structural parameters and performance index.This differences in the less amount of resin was difficult to eliminate. But if increasing the amount of resin in the experiment, the absorption effect could be improved.2. Adsorption feature of different kinds of polystyrene-based MARs was investigated systemically at constant temperature employing Rutin as the adsorbate. And found that the adsorption feature of MARs was different than that of normal adsorbent,we found the fourth adsorption pattern, which considering the capillary effect, could be well explained above adsorption results of MARs after being referred to the five adsorption patterns presented by Brunauer. This feature was due to their particularity in structure, and there existed macropore, mesopores and micropores in MARs, many smaller pores existed in the inner face of the larger pores, so the capillary effect should take place inevitably during the adsorption, During the adsorption process, the capillary effect always occurred as the adsorption of MARs altered from macropores to mesopores or from mesopores to micropores. variation of the equilibrium adsorption capacity and equilibrium concentrations was not positive-going, so the waves of Ce in adsorption process of MARs could be attributed to the capillary effect during the intersection of two adsorption stages. This provided a solid experimental basis for the assumption of three adsorption stages. Through analysis and investigation, we concluded the hypothesis that the inductive effect transmitted to the first layer was unreasonable. Considered the deficiency of Wang, the pattern that the inductive effect passed to a higher layer was proposed. The real terminated layer of the inductive effect was investigated through regression of the experimental results. The regression results both in macropore and mesopore suggested that the inductive effect transmitted to the third layer, which was in accordance with that of chemical bond, This was not be found out in solid/liquid adsorption system of previously reported. A novel and more reasonable adsorption pattern, five parameters equation, for MAR was brought out.3.After studying styrene MARs and ion exchange resins with different pore structure parameters and polarities,what we obtained was as follows:functional groups of resins had a primary effect on adsorption process and adsorbance, and Rutin had no obvious capillary depression when it adsorbed on ion exchange resin; the larger average pore diameter of non-polarity or middle-polarity MARs, the greater adsorption capacity in macroporous; varying with average pore diameter the adsorption capacity's change of non-polarity MARs was more regular than middle-polarity MAR. But reached an maximum in mesopore and the corresponding average pore diameter was 26 nm. However, the adsorption capacity of Rutin on middle-polarity MARs had no regularity. So the relationship between poresize and the maximum saturation adsorption capacity was only studied on non-polarity MARs. And the conclusion was that the larger average poresize of MARs the greater maximum saturation adsorption capacity. And the same reason, the relationship between pore volume and the maximum saturation adsorption capacity was only studied on non-polarity MARs, and the conclusion of maximum saturation adsorption capacity and pore volume was that the larger average pore volume of MARs, the greater maximum saturation adsorption capacity. And the specific surface area of MARs did not a critical effect on adsorption capacity and adsorption process of Rutin on MARs.