| In recent years, the adsorbent with high adsorption capacity, good performance hasbecome a research focus.Grafting polymer on the surface of materials which containactive functional groups,we can prepara new adsorbents with high adsorptionperformance.In this study, D301, MUF, starch were grafted sodium p-styrene sulfonaterespectively,obating the material with a higher adsorption capacity for metal ions. It maygreatly improve efficiency of adsorption capacity for metal ion. Therefore, the results ofthis study has important scientific significance and application value to promote thecapacity of the metal ion.In this paper,three kinds of functionlized adsorbent were synthesized,and carry out asystematic study for the adsorption properties of materials.Using redox initiating system constituted by the amino groups of CD301particlesand persulfate in the solution, the poly(sodium styrene sulfonate)(PSSS) was graftedonto the surface of CD301which is surface-carbonized at the heat of300℃, obtainingthe grafted material PSSS-g-CD301. PSSS-g-CD301was characterized by infraredspectrum (FTIR), Scanning electron microscopy（SEM）,element analysis（EA）, and thedegree of grafting was measured by gravimetric method and titration method.The effectsof the main factors on the graft-polymerization of PSSS were examined and theadsorption behaviour of PSSS-g-CD301for Fe3+is investigated in this paper using staticmethod.The results showed that the optimal time and temperature for thesurface—initiated graft polymerization system are10h and308k.The appropriatereaction conditions are：1%of the initiator and nearly10ï¼…of the monomerconcentration, the grafting rate can reach17.8%;the adsorption capacity of PSSS-g-CD301for Fe3+can reach0.28mmol/g at pH of2and temperature of288K.The adsorptionprocess followed Pseudo-second order model, and the adsorption behaviour fitted by Freundlich and Langmui requations. The thermody namic datas (â–³H,â–³G,â–³S) arecalculated, and the results suggested that the adsorption of Fe3+on PSSS-g-CD301is aentropy-driving, endothermic and spontaneous process.Using redox initiating system constituted by the hydroxyl groups of CD301andCerium in the solution, the poly(sodium styrene sulfonate)(PSSS) was grafted onto thesurface of CST which is surface-carbonized at the heat of600℃, obtaining the graftedmaterial PSSS-g-CST.PSSS-g-CST was characterized by infrared spectrum (FTIR),Scanning electron microscopy（SEM）ã€element analysi（sEA）, and the degree of graftingwas measured by gravimetric method and titration method.The effects of the mainfactors on the graft-polymerization of PSSS were examined and the adsorptionbehaviour of PSSS-g-CST for Sc3+is investigated in this paper using static method. Theresults showed that the optimal time and temperature for the surface—initiated graftpolymerization system are10h and308k. The appropriate reaction conditions are：theconcentration of H+ion is0.36mol/L, nearly6.2mmol/L of the initiator concentration,temperature for the surface—initiated graft polymerization system is318k. PSSS-g-CSTpossesses strong adsorption ability towards Fe3+.The adsorption capacity can get up to0.3mmol·g-1. Adsorption speed is very fast.The adsorption capacity increased with theincrease of the value of pH and the reduce of the temperature.Using redox initiating system constituted by the amino groups of MUF particlesand persulfate in the solution, the poly(sodium styrene sulfonate)(PSSS) was graftedonto the surface of MUF which is surface-carbonized at the heat of523K, obtaining thePSSS-g-MUF carboned material with high adsorption capacity. PSSS-g-MUF wascharacterized by infrared spectrum (FTIR), Scanning electron microscopy（SEM）,element analysis（EA）, thermogravimetric Analysis（TG）and the degree ofgrafting was measured by gravimetric method and titration method. The effects of themain factors on the graft-polymerization of PSSS were examined and the adsorptionbehaviour of PSSS-g-MUF carboned material for Sc3+is investigated in this paper usingstatic method.The results showed that the optimal time and temperature for the surface—initiated graft polymerization system are14h and303k.The appropriatereaction conditions are：1%of the initiator and nearly10ï¼…of the monomerconcentration, the adsorption capacity can get up to0.36mmol·g-1;the adsorptioncapacity of PSSS-g-CD301for Fe3+can reach0.28mmol/g at pH of3.4and temperatureof288K.The adsorption capacity increased with the increase of temperature and thevalue of pH. The adsorption capacity increased with the increase of the value of pH andthe reduce of the temperature. |
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