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首页> 外文期刊>RSC Advances >Preparation and application of Ni(II) ion-imprinted silica gel polymer for selective separation of Ni(II) from aqueous solution
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Preparation and application of Ni(II) ion-imprinted silica gel polymer for selective separation of Ni(II) from aqueous solution

机译：Ni（ii）离子印迹硅胶聚合物的制备及应用，用于从水溶液中选择性分离Ni（II）的分离

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摘要

In the present study, a novel Ni(II) ion-imprinted sulfonate functionalized silica gel polymer was prepared with the surface imprinting technique by using nickel(II) as the template ion, grafted silica gel as the support, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and ethylene glycol dimethacrylate (EGDMA) as the functional monomer and crosslinker, respectively. The sorbent was characterized by FT-IR, SEM, EDX, TG and BET. Kinetics studies indicated that the adsorption equilibrium was achieved within 12 min and the adsorption kinetics followed the pseudo-secondorder rate equation. The adsorption isotherm was well fitted by the Langmuir model. The Ni(II) ionimprinted silica gel polymer (Ni(II)-IIP) exhibited a higher adsorption capacity and selectivity for Ni(II) in comparison to the non-imprinted silica gel polymer (Ni(II)-NIP). The maximum adsorption capacities of Ni(II)-IIP and Ni(II)-NIP for Ni(II) were 20.30 and 4.87 mg g(-1), respectively. The relative selectivity coefficients of the adsorbent for Ni(II) in the presence of Co(II), Cu(II), Zn(II) and Pb(II) were 4.09, 3.62, 5.78 and 5.86, respectively. Reusability studies indicated that the adsorption capacity of the prepared sorbent did not decrease significantly after repeated use six times. The precision of this method was verified and the prepared sorbent can be considered to be a promising sorbent for selective separation of Ni(II) from natural water samples.
机译：在本研究中，通过使用镍（II）作为模板离子，接枝硅胶作为载体，用表面积压印技术制备新的Ni（II）离子压印的磺酸官能化硅胶聚合物，以及2-丙烯酰胺-2 - 甲基-1-丙二磺酸（AMPS）和乙二醇二甲基丙烯酸酯（EGDMA）分别为功能性单体和交联剂。吸附剂的特征是FT-IR，SEM，EDX，TG和BET。动力学研究表明，在12分钟内实现吸附平衡，吸附动力学遵循伪二阶率方程。吸附等温线由Langmuir模型齐全。与非印记硅胶聚合物相比，Ni（II）离子型硅胶聚合物（Ni（II）-IIP）表现出较高的吸附能力和Ni（II）的选择性，与Ni（II）相比（Ni（II）-NIP）。 Ni（II）-IIP和Ni（II）-NIP的最大吸附容量分别为20.30和4.87mg（-1）。在CO（II），Cu（II），Zn（II），Zn（II）和Pb（II）的存在下，Ni（II）的吸附剂的相对选择性系数分别为4.09,3.62,5.78和5.86。重复使用性研究表明，在重复使用六次后，制备的吸附剂的吸附能力不会显着降低。验证了该方法的精度，并且可以认为制备的吸附剂是对自然水样品的选择性分离Ni（II）的有前途的吸附剂。

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  • 来源
    《RSC Advances》 |2017年第25期|共10页
  • 作者

    He Hongxing; Gan Qiang; Feng Changgen;

  • 作者单位

    Beijing Inst Technol State Key Lab Explos Sci &

    Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci &

    Technol Beijing 100081 Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci &

    Technol Beijing 100081 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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