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Barium/Cobalt@Polyethylene Glycol Nanocomposites for Dye Removal from Aqueous Solutions

机译：钡/钴@聚乙二醇纳米复合材料从水溶液中除去染料

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Dyes are known as one of the most dangerous industrial pollutants which can cause skin diseases, allergy, and provoke cancer and mutation in humans. Therefore, one of the important environmental issues is the effective removal of dyes from industrial wastewater. In the current work, BaFe12O19/CoFe2O4@polyethylene glycol (abbreviated as BFO/CFO@PEG) nanocomposite was synthesized and evaluated regarding its capacity for adsorptive removal of a model dye Acid Blue 92 (denoted as AB92) from aqueous solutions. The characteristics of the prepared nanocomposite was determined by tests such as X-ray diffraction (XRD), scanning electron microscope (SEM), vibration sample magnetization (VSM), and Fourier transform infrared spectroscopy (FTIR). The effects of conditional parameters including pH (2–12), initial concentration of dye (20–100 mg/L), adsorbent dosage (0.02–0.1 g/L) and contact time (0-180 min) on the adsorption of dye were investigated and then optimized. The results indicated that with the increase of the adsorbent dosage from 0.02 to 0.1 g/L, the removal efficiency increased from 74.1% to 78.6%, and the adsorbed amount decreased from 148.25 to 31.44 mg/g. The maximum removal efficiency (77.54%) and adsorption capacity (31.02 mg/g) were observed at pH 2. Therefore, the general optimization conditions revealed that the maximum adsorption efficiency of dye was obtained in condition of initial concentration of 20 mg/L, contact time of 1 h and pH of solution equal 2. The adsorption isotherm and kinetic data were evaluated using a series of models. The pseudo-second order kinetic model and Freundlich isotherm model show the best fitting with experimental data with R2∼0.999.
机译：染料被称为最危险的工业污染物可引起皮肤疾病，过敏，并引起癌症和变异在人类中的一个。因此，重要的环境问题之一是有效去除工业废水染料。在目前的工作中，钡铁氧体/铁酸钴@聚乙二醇（缩写为BFO / CFO @ PEG）纳米复合材料的合成和评价关于其用于吸附从水溶液中去除一个模型染料酸性蓝92（表示为AB92）的容量。所制备的纳米复合材料的特征是通过测试例如X射线衍射（XRD）测定，扫描电子显微镜（SEM），振动样品磁化强计（VSM）和傅里叶变换红外光谱（FTIR）。条件参数的包括pH值（2-12），染料（20-100毫克/升），吸附剂用量（0.02-0.1克/升）和接触时间（0-180分钟）的初始浓度在染料的吸附性能的影响进行了调查，然后进行了优化。结果表明，与吸附剂的剂量从0.02至0.1g / L的增加，移除效率从74.1％提高到78.6％，和吸附量从148.25降低至31.44毫克/克。最大去除率（77.54％）和吸附容量（31.02毫克/克），在pH 2。因此观察到的，一般优化条件显示，以20毫克/升初始浓度的条件下得到染料的最大吸附效率，的1个小时的接触时间和的溶液的pH值等于2，使用一系列的模型中的吸附等温线和动力学数据的评价。伪二级动力学模型和Freundlich等温模型显示与R2~0.999实验数据的最佳拟合。

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