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首页> 外文期刊>Environmental research >Synthesis, characterization and application of a novel ion hybrid imprinted polymer to adsorb Cd(Ⅱ) in different samples
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Synthesis, characterization and application of a novel ion hybrid imprinted polymer to adsorb Cd(Ⅱ) in different samples

机译：新型离子杂交压印聚合物在不同样品中的吸附CD（Ⅱ）的合成，表征和应用

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摘要

Two new ionic imprinted hybrid polymers (IIHP) and their corresponding non imprinted hybrid polymers (NIHP) were synthesized. The prepared IIHP was highly selective to Cd~(2+). To prepare the IIHP, 1-vinylimidazole (VIN) was used as the functional monomer, (3-mercaptopropyl) trimethoxysilane (MP) or (3-aminopropyl) tri-methoxysilane (AMP) was used as the functional organosilane, trimethylolpropane (TRIM) was used as the crosslinking agent, AIBN was used as a radical initiator and TEOS was used as a functional precursor. The functional monomer was selected considering calculations based on the density functional theory (DFT). The fabricated materials were characterized via field emission gun scanning electron microscopy (FEG-SEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX) and thermogravimetric analysis (TGA). The maximum adsorption capacity of Cd~(2+) was achieved at a pH of 7.2 in the tris-HCl medium. The adsorption test indicated that the reaction followed pseudo second order kinetics, and the equilibrium sorption data fitted well into the Langmuir isotherm model. The relative selectivity coefficients of polymers IIHP-VIN-AMP and IIHP-VIN-MP, as evaluated in binary mixtures of Cd~(2+) and interferent cations (Pb~(2+) , Zn~(2+) , Hg~(2+), Cu~(2+), Ni~(2+), Ca~(2+), Mg~(2+), and Na~+ ) at different molar ratios, were greater than one due to the presence of specific recognition sites for Cd~(2+) ions. Moreover, the selective materials exhibited a high reusability and re-producibility in the context of Cd~(2+) adsorption. These adsorbent materials, specifically IIHP-VIN-MP, exhibited a % removal efficiency of more than 90% for the Cd~(2+) in river water samples.
机译：合成了两种新的离子印迹杂化聚合物（IIHP）及其相应的非印记杂化聚合物（NIHP）。制备的IIHP对CD〜（2+）具有高度选择性。制备IIHP，使用1-乙烯基咪唑（VIN）作为官能单体，（3-巯基丙基）三甲氧基硅烷（MP）或（3-氨基丙基）三 - 甲氧基硅烷（AMP）作为功能性有机硅烷，三羟甲基丙烷（修剪）用作交联剂，AIBN用作自由基引发剂，并且将TEOS用作官能前体。考虑基于密度泛函理论（DFT）的计算选择功能性单体。通过现场发射枪扫描电子显微镜（FEG-SEM），傅里叶变换红外光谱（FTIR），能量分散X射线光谱（EDX）和热重分析（TGA）的制造材料表征。 CD〜（2+）的最大吸附容量在Tris-HCl培养基中的pH值为7.2。吸附试验表明，反应遵循伪二阶动力学，并将均衡的吸附数据置于Langmuir等温模型中。聚合物IIHP-VIN-AMP和IIHP-VIN-MP的相对选择性系数，如CD〜（2+）和干扰阳离子的二元混合物中评价（PB〜（2+），Zn〜（2+），Hg〜 （2+），Cu〜（2+），Ni〜（2+），Ca〜（2+），Mg〜（2+），不同摩尔比的含量大于CD〜（2+）离子的特定识别位点的存在。此外，在CD〜（2+）吸附的背景下，选择性材料表现出高可重复的可重用性和再生产性。这些吸附剂材料，特别是IIHP-VIN-MP，在河水样品中的CD〜（2+）显示出大于90％以上的50％以上的除去效率。

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  • 来源
    《Environmental research》 |2020年第8期|109669.1-109669.10|共10页
  • 作者

    Anais Adauto; Sabir Khan; Matheus Augusto da Silva; Jose Anchieta Gomes Neto; Gino Picasso; Maria del Pilar Taboada Sotomayor;

  • 作者单位

    Laboratory of Physical Chemistry Research Faculty of Sciences National University of Engineering Av. Tupac Amaru 210 Rimac Lima Peru;

    Laboratory of Physical Chemistry Research Faculty of Sciences National University of Engineering Av. Tupac Amaru 210 Rimac Lima Peru Department of Analytical Chemistry Institute of Chemistry State University of Sao Paulo (UNESP) 14801-970 Araraquara SP Brazil;

    Department of Analytical Chemistry Institute of Chemistry State University of Sao Paulo (UNESP) 14801-970 Araraquara SP Brazil;

    Department of Analytical Chemistry Institute of Chemistry State University of Sao Paulo (UNESP) 14801-970 Araraquara SP Brazil;

    Laboratory of Physical Chemistry Research Faculty of Sciences National University of Engineering Av. Tupac Amaru 210 Rimac Lima Peru;

    Department of Analytical Chemistry Institute of Chemistry State University of Sao Paulo (UNESP) 14801-970 Araraquara SP Brazil National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Araraquara SP Brazil;

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  • 正文语种 eng
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  • 关键词

    Ion imprinted polymer; Hybrid materials; Polymers; Cadmium (Ⅱ) adsorption; Atomic absorption spectroscopy;

    机译：离子印迹聚合物;混合材料;聚合物;镉（Ⅱ）吸附;原子吸收光谱法;

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