Assesment of dimethyl phthalate removal from aqueous phase using barium hexaferrite containing magnetic beads.
Assesment of dimethyl phthalate removal from aqueous phase using barium hexaferrite containing magnetic beads.
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DOI：
10.1016/j.jcis.2012.03.069
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发表时间：
2012-07
影响因子：
9.9
通讯作者：
B. Osman;E. Özer;A. Kara;Ş. Güçer;Necati Beşirli
中科院分区：
文献类型：
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作者：
B. Osman;E. Özer;A. Kara;Ş. Güçer;Necati Beşirli
合成并表征了六角铁氧体（BaFe_（12）O_（19））磁性聚（乙二醇二甲基丙烯酸酯-乙烯基吡啶; mag-poly [EGDMA-VP]）微球（平均粒径为53-212μm）。研究了它们作为吸附剂从水溶液中去除邻苯二甲酸二甲酯的性能。以4-乙烯基吡啶（VP）和乙二醇二甲基丙烯酸酯（EGDMA）为单体，通过共聚制备了磁性聚（EGDMA-VP）微球。采用N2吸附/脱附等温线（BET）、振动样品磁强计（VSM）、X射线粉末衍射（XRD）、元素分析、扫描电镜（SEM）和溶胀研究等方法对磁性聚乙烯（EGDMA-VP）微球进行了表征。在固定固液比条件下，考察了pH、初始浓度、吸附时间、温度等因素对吸附效果的影响。在pH3.0、25°C条件下，磁性聚乙烯（EGDMA-VP）微球的最大吸附容量为96.2mg/g。所有的等温线数据可以用Langmuir和Dubininin-Radushkevich等温线模型拟合。吸附动力学模型采用准一级、准二级、里奇二级和粒内扩散模型。所得热力学参数表明吸附的放热性质。在10批连续反应后，磁珠的吸附容量没有变化，证明了磁珠在应用中的有用性。
The barium hexaferrite (BaFe12O19) containing magnetic poly (ethylene glycol dimethacrylate-vinyl pyridine; mag-poly [EGDMA–VP]) beads (average diameter=53–212μm) were synthesized and characterized. Their use as an adsorbent in the removal of dimethyl phthalate (DMP) from an aqueous solution was investigated. The mag-poly (EGDMA–VP) beads were prepared by copolymerizing of 4-vinyl pyridine (VP) with ethylene glycol dimethacrylate (EGDMA). The mag-poly (EGDMA–VP) beads were characterized by N2adsorption/desorption isotherms (BET), vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), elemental analysis, scanning electron microscope (SEM), and swelling studies. At a fixed solid/solution ratio, the various factors affecting the adsorption of DMP from aqueous solutions such as pH, initial concentration, contact time, and temperature were analyzed. The maximum DMP adsorption capacity of the mag-poly (EGDMA–VP) beads was determined as 96.2mg/g at pH 3.0, 25°C. All the isotherm data can be fitted with both the Langmuir and the Dubinin–Radushkevich isotherm models. The pseudo-first-order, pseudo-second-order, Ritch-second-order, and intraparticle diffusion models were used to describe the adsorption kinetics. The thermodynamic parameters obtained indicated the exothermic nature of the adsorption. The DMP adsorption capacity did not change after 10 batch successive reactions, demonstrating the usefulness of the magnetic beads in applications.