| ADSORPTION OF BENZOIC ACID AND P-NITROBENZOIC ACID ON A NEW HYPERCROSSLINKED PHENOL GROUP PST ADSORBENT |
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| 作者姓名： | ZHANG Gencheng LIU Fuqiang FEI Zhenghao [ |
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| 作者单位： | ZHANG Gencheng1 LIU Fuqiang2 FEI Zhenghao1，2[( )-241.4( )-241.4( )]LI Aimin1，2[( )-241.4( )]ZHANG Quanxing2 1 Institute of Applied Chemistry and Environmental Engineering，Department of Chemistry，Yancheng Teachers College，Yancheng 224002，China 2 State Key Laboratory of Pollution Control and Resources Reuse，School of the Environment Nanjing University，Nanjing 210093，China |
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| 基金项目： | Educational Committee of Jiangsu Province. (01KJD150004) |
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| 摘 要： | 1.INTRODUCTIONThepolymericadsorbentAmberliteXAD-4isconsideredoneofthemostsuitablepolymericadsorbentsforremovingphenoliccompoundsfromwaterstreams1,2]becauseitischemicallystable,notsolubleinsolventsandmoreselectiveforaromaticringsduetoitshydrophobicproperties.However,methanol,acetoneoracetonitrile,hastobeusedtoenhancethesurfacecontactbetweenadsorbentandthesolute.DavankovandTsyurupadescribedanewseriesofadsorbents3,4].Thistechniqueyieldedpolystyrenesorbentsofunusualhypercrosslinkedstructu…
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ADSORPTION OF BENZOIC ACID AND P-NITROBENZOIC ACID ON A NEW HYPERCROSSLINKED PHENOL GROUP PST ADSORBENT |
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| ZHANG Gencheng LIU Fuqiang FEI Zhenghao,.ADSORPTION OF BENZOIC ACID AND P-NITROBENZOIC ACID ON A NEW HYPERCROSSLINKED PHENOL GROUP PST ADSORBENT[J].离子交换与吸附(英文版),2003(1). |
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| Authors: | ZHANG Gencheng LIU Fuqiang FEI Zhenghao [ |
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| Institution: | ZHANG Gencheng1 LIU Fuqiang2 FEI Zhenghao1,2[ |
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| Abstract: | A comparison of the adsorption of benzoic acid and p-nitrobenzoic acid on the new hypercrosslinked polymeric adsorbent AM-1, with that by macroporous Amberlite XAD-4, including the equilibrium adsorption isotherms, the dynamic adsorption behaviors through column and the adsorption thermodynamics were studied. Results show that Freundlich equation gives a fitting adsorption isotherm. The specific surface of AM-1 is only 67% of that of Amberlite XAD-4, but the adsorption capacities on AM-1 are much higher about 125%~166% than that on Amberlite XAD-4, which is contributed to the micropore mechanism and polarity. The negative values of the adsorption enthalpy are indicative of an exothermic process. Enthalpy and free energy changes of adsorption both manifest a physic-sorption process. The negative values of the adsorption entropy indicate that the adsorption is well consistent with the restricted mobilities and the configurations of the adsorbed benzoic acid molecules on the surface of studied adsorbents with superficial heterogeneity. Both adsorbents were used in mini-column experiments for adsorbing benzoic acid expecting to elucidate the higher breakthrough adsorption capacity of the new hypercrosslinked polymeric adsorbent AM-1 as compared with that of Amberlite XAD-4. |
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| Keywords: | Hypercrosslinked phenol group Pst adsorbent Adsorption of benzoic acid p-Nitrobenzoic acid Thermodynamic properties |
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