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首页> 外文期刊>Journal of Applied Polymer Science >Bifunctional cellulose derivatives for the removal of heavy-metal ions and phenols: Synthesis and adsorption studies
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Bifunctional cellulose derivatives for the removal of heavy-metal ions and phenols: Synthesis and adsorption studies

机译：用于去除重金属离子和酚的双功能纤维素衍生物：合成和吸附研究

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In this article, we report a study of the design and synthesis of a bifunctional cellulose derivative on the removal of phenols and heavy-metal ions in wastewater treatment. A radical polymerization was performed in an ionic liquid, 1-allyl-3-methylimidazolium chloride, to graft two monomers, butyl methacrylate and 4-vinyl pyridine, on the backbone of cellulose. The effects of the five reaction conditions on the yield of final products were evaluated. The grafted celluloses were characterized by means of Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Adsorption experiments were carried out on the cellulose-g-poly(butyl methacrylate-co-4-vinyl pyridine) to evaluate the capacity of the removal of 2,4-dichlorophenol (2,4-DCP) and Cu(II) in water. The adsorption isotherms were measured at five temperatures and interpreted by a Langmuir model of adsorption. The thermodynamics of the adsorption suggested that the binding process was mildly exothermic for Cu(II) and endothermic for 2,4-DCP. Kinetic studies were interpreted with a pseudo-second-order adsorption model. The process of the adsorption of 2,4-DCP could be described overall by the model, whereas the adsorption of Cu(II) involved two processes. This was due to adsorption both on the surface and inside the adsorbent. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41830.
机译：在本文中，我们报告了一种双功能纤维素衍生物在废水处理中去除酚和重金属离子的设计和合成研究。在离子液体1-烯丙基-3-甲基咪唑鎓氯化物中进行自由基聚合，以将两种单体甲基丙烯酸丁酯和4-乙烯基吡啶接枝在纤维素的骨架上。评估了五个反应条件对最终产物收率的影响。借助于傅立叶变换红外光谱，扫描电子显微镜和热重分析来表征接枝的纤维素。对纤维素-g-聚（甲基丙烯酸丁酯-co-4-乙烯基吡啶）进行了吸附实验，以评估水中2，4-二氯苯酚（2,4-DCP）和Cu（II）的去除能力。在五个温度下测量吸附等温线，并通过Langmuir吸附模型进行解释。吸附的热力学表明，结合过程对Cu（II）适度放热，对2,4-DCP则吸热。动力学研究用伪二级吸附模型解释。该模型可以整体描述2,4-DCP的吸附过程，而Cu（II）的吸附涉及两个过程。这是由于在吸附剂的表面和内部都被吸附。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41830。

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