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PREPARATION OF SURFACE ION-IMPRINTED ATTAPULGITE-SUPPORTED POLYMER AND ITS ADSORPTION BEHAVIORS OF Sr(II)

Chinese Journal of Reactive Polymers 2008年第Z1期 55-65页

作者： pan jianming yan yongsheng li chunxiang chemistry and chemical engineering, jiangsu university, zhenjiang 212013, china

The surface ion-imprinting concept and chitosan incorporated sol-gel process were applied to the preparation of a new attapulgite-supported organic-inorganic hybrid polymer for selective separation of Sr(II) from aqueous solution. The prepared polymer was characterized with SEM, IR and XRD. The results showed that as a sorbent, it had good configuration and binding sites. Its adsorption behaviors for Sr(II) was investigated by FAAS and ICP-AES. The effects on adsorption capacities, including pH, quiescent time, and adsorbent amount were discussed, and the adsorption isothermal curve was obtained. Then the Kd a parameter estimating relative adsorbability, was conducted to study the selectivity towards Sr(II) of the prepared polymer. Under the optimum conditions, the ion-imprinted polymer offered a fast kinetics for the adsorption of Sr(II) and the maximum capacity was 12.9mg/g. The Kd and K parameters estimating relative adsorbability towards target ion, suggested that selective recognition of the ion-imprinted polymer towards Sr(II) was much higher than that of the non-imprinted polymer and attapulgite. Furthermore, the ion-imprinted polymer is of great regeneration capacity. The prepared functional polymer was shown to be promising for selective preseparation and enrichment of trace Sr(II) in environmental samples.

关键词： Attapulgite Chitosan (CTS) Surface Ion-imprinting Adsorption Selective Recognition Sr(II).

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Synthesis,characterization,and adsorption performance of Pb(Ⅱ)-imprinted polymer in nano-TiO_2 matrix

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Journal of Environmental Sciences 2009年第12期21卷 1722-1729页

作者： li chunxiang GAO Jie pan jianming ZHANG Zulei yan yongsheng School of chemistry and chemical engineering Jiangsu University Zhenjiang 212013 China

Surface ion-imprinted in combination with sol-gel process was applied to synthesis a new Pb（Ⅱ）-imprinted polymer for selective separation and enrichment of trace Pb（Ⅱ） from aqueous solution. The prepared material was characterized by using the infrared spectra, X-ray diffractometer, and scanning electron microscopy. The batch experiments were conducted to study the optimal adsorption condition of adsorption trace Pb（Ⅱ） from aqueous solutions on Pb（Ⅱ）-imprinted polymer. The equilibrium was achieved in approximately 4,0 h, and the experimental kinetic data were fitted the pseudo second-order model better. The maximum adsorption capacity was 22.7 mg/g, and the Langmuir equation fitted the adsorption isotherm data. The results of selectivity experiment showed that selectively adsorbed rate of Pb（Ⅱ） on Pb（Ⅱ）-imprinted polymer was higher than all other studied ions. Desorption conditions of the adsorbed Pb（Ⅱ） from the Pb（Ⅱ）-imprinted polymer were also studied in batch experiments. The prepared Pb（Ⅱ）-imprinted polymer was shown to be promising for the separation and enrichment of trace Pb（Ⅱ） from water samples. The adsorption and desorption mechanisms were proposed.

关键词： Pb(Ⅱ) ion-imprinted sol-gel adsorption selective

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PREPARATION OF SURFACE ION-IMPRINTED ATTAPULGITE-SUPPORTED POLYMER AND ITS ADSORPTION BEHAVIORS OF Sr(II)

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Chinese Journal of Reactive Polymers 2008年第1期17卷 55-65页

作者： pan jianming yan yongsheng li chunxiang chemistry and chemical engineering Jiangsu University Zhenjiang 212013 China

关键词： Attapulgite Chitosan (CTS) Surface Ion-imprinting Adsorption Selective Recognition Sr(II).

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