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首页> 外文期刊>Polimery >Hybrid polymer containing ferric oxides obtain using a redox polymer. Part II. Sorption properties towards chromate
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Hybrid polymer containing ferric oxides obtain using a redox polymer. Part II. Sorption properties towards chromate

机译：使用氧化还原聚合物获得包含氧化铁的杂化聚合物。第二部分对铬酸盐的吸附特性

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In this work a hybrid material containing iron oxide was used as an effective sorbent for removal of Cr(VI) from water solutions. The hybrid sorbent was obtained by new method using redox S/DVB copolymer containing N-chlorosulfonamide functional groups in reduction/oxidation reaction with Fe(II) ions. The obtained product contained sulfonamide functional groups which are not charged in wide pH range (till pH = 11.0), what differs our product from other polymeric hybrid sorbents with iron oxide reported in the literature and obtained on the basis of ion exchangers. The sorption kinetic data were well described by pseudo-second order model indicating the chemisorption of chromate onto iron oxide surface. These data also correlated well with intraparticle diffusion model, what showed that diffusion within the polymer structure was the rate determining step of the chromate sorption process. The equilibrium studies showed that removal of Cr(VI) was pH dependent and was favored under acidic conditions (pH = 2.5—5.0). After adsorption process chromates were effectively desorbed from the adsorbent surface by NaOH solution.
机译：在这项工作中，含有氧化铁的杂化材料被用作从水溶液中去除Cr（VI）的有效吸附剂。杂化吸附剂是通过新方法使用含有N-氯磺酰胺官能团的氧化还原S / DVB共聚物在与Fe（II）离子的还原/氧化反应中获得的。所得产物含有在宽pH范围内（直至pH ＝ 11.0）不带电荷的磺酰胺官能团，这与我们的产物与文献中报道并基于离子交换剂获得的其他具有氧化铁的聚合物杂化吸附剂不同。吸附动力学数据用伪二级模型很好地描述，表明铬酸盐在氧化铁表面上的化学吸附。这些数据还与颗粒内扩散模型密切相关，这表明聚合物结构内的扩散是铬酸盐吸附过程的速率决定步骤。平衡研究表明，Cr（VI）的去除取决于pH，在酸性条件下（pH = 2.5-5.0）是有利的。吸附过程之后，铬酸盐被NaOH溶液有效地从吸附剂表面解吸。

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