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首页> 外文OA文献 >Cu(II) immobilization onto a one-step synthesized poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) resin: Kinetics and XPS analysis
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Cu(II) immobilization onto a one-step synthesized poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) resin: Kinetics and XPS analysis

机译：Cu（II）固定到一步合成的聚（4-乙烯基吡啶-共聚乙二醇二甲基丙烯酸酯）树脂上：动力学和XPS分析

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摘要

Synthesis of an unconventional resin based on 4-vinylpyridine (4-VP) and its Cu(II) sorption behavior were studied. Three samples of macroporous crosslinked poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) (P4VPE) with different porosity parameters were prepared by suspension copolymerization by varying the n-heptane amount in the inert component. The samples were characterized by mercury porosimetry, elemental analysis and X-ray photoelectron spectroscopy (XPS). The sorption of P4VPE for Cu(II) ions, determined under non-competitive conditions, was relatively rapid, i.e., the maximum capacity was reached within 30 min. The maximum experimental sorption capacity for the sample with the highest values of pore diameter and specific pore volume (sample 3, Qeq = 89 mg g–1) was 17.5 times higher than for the sample with the lowest values of pore diameter and specific pore volume (sample 1, Qeq = 5.1 mg g–1). Since the values for pyridine content in all P4VPE samples were almost the same, it was concluded that the porosity parameters have predominant influence on Cu(II) sorption rates on P4VPE. The sorption behavior and the rate-controlling mechanisms were analyzed using six kinetic models (pseudo-first order, pseudo-second order, Elovich, intraparticle diffusion, Bangham and Boyd models). XPS study clarified the nature of the formed P4VPE-Cu(II) species.
机译：研究了基于4-乙烯基吡啶（4-VP）的非常规树脂的合成及其对Cu（II）的吸附行为。通过改变惰性组分中的正庚烷含量，通过悬浮共聚制备了三个具有不同孔隙率参数的大孔交联聚（4-乙烯基吡啶-共-乙二醇二甲基丙烯酸丙酯）（P4VPE）样品。通过汞孔隙率法，元素分析和X射线光电子能谱（XPS）对样品进行了表征。在非竞争条件下测定，P4VPE对Cu（II）离子的吸附相对较快，即在30分钟内达到最大容量。孔径和比孔体积最大的样品的最大实验吸附容量（样品3，Qeq = 89 mg g-1）比孔径和比孔体积最小的样品的最大实验吸附容量高17.5倍。 （样品1，Qeq = 5.1 mg g-1）。由于所有P4VPE样品中的吡啶含量值几乎相同，因此可以得出结论，孔隙率参数主要影响P4VPE上Cu（II）的吸附速率。使用六个动力学模型（伪一阶，伪二阶，Elovich，粒子内扩散，Bangham和Boyd模型）分析了吸附行为和速率控制机制。 XPS研究澄清了形成的P4VPE-Cu（II）物种的性质。

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