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首页> 外文期刊>African Journal of Biotechnology >MnFe2O4/bentonite nano composite as a novel magnetic material for adsorption of acid red 138
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MnFe2O4/bentonite nano composite as a novel magnetic material for adsorption of acid red 138

机译：MnFe2O4 /膨润土纳米复合材料作为吸附酸性红138的新型磁性材料

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Magnetic MnFe2O4/bentonite nanocomposite was synthesized by chemical co-precipitation method. The product was characterized by X-ray diffraction (XRD) and Scanning electron microscope (SEM). XRD results indicated the presence of free quartz in bentonite. The magnetic ferrite MnFe2O4?has spinel structure. It is also found that the presence of bentonite in the magnetic composite has not made any changes in the spinel structure of MnFe2O4. SEM images of the sorbent shows nanocomposite with a uniform structure and nanochannels from 0.3 to 0.8 mμ in diameter having a surface area of 130 m2?g-1. The results also revealed that the composite has much higher catalytic activity than the bentonite. The process confirmed very fast kinetic and pseudo-second-order model for acid red 138 (AR138) from aqueous solutions. The adsorption of AR138 was strongly dependent on the pH of the medium, where the removal efficiency increased as the pH decreased in pH 2.
机译：采用化学共沉淀法合成了磁性MnFe2O4 /膨润土纳米复合材料。通过X射线衍射（XRD）和扫描电子显微镜（SEM）对产物进行表征。 XRD结果表明膨润土中存在游离石英。磁性铁氧体MnFe2O4具有尖晶石结构。还发现磁性复合物中膨润土的存在并未改变MnFe 2 O 4的尖晶石结构的任何变化。吸附剂的SEM图像显示具有均匀结构的纳米复合材料和直径为0.3-0.8mμ的纳米通道，表面积为130 m2？g-1。结果还表明，该复合材料比膨润土具有更高的催化活性。该方法证实了水溶液中酸性红138（AR138）的快速动力学和拟二级动力学模型。 AR138的吸附强烈依赖于介质的pH值，随着pH值在pH 2中降低，去除效率会增加。

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