Abstract In the present work, a simple synthesis approach was applied for the fabrication of CoFe2O4@SiO2-polyethyleneimine magnetic nanoparticles as an effective sorbent for ultrasonic-assisted removal of disulfine blue dye from an aqueous solution. For identification and characterization of prepared sorbent, different analysis including Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM), Vibrating sample magnetometer (VSM), Energy dispersive X-ray analysis (EDX) and Transmission electron microscopy (TEM) were applied. The effect of effective parameters on the removal of disulfine blue such as pH, sorbent mass, ultrasonic time and disulfine blue concentration were also assessed. The optimum values for investigated parameters were achieved to be as follows: pH of 5.0, sorbent mass of 0.015 g, ultrasonic time of 5.0 min and disulfine blue concentration of 10.0 mg L−1. Different isotherm and kinetic models were used for the evaluation of isotherm and kinetic of adsorption. Results showed that the Langmuir isotherm model was better than other isotherm models as well as the second-order equation model was selected as a kinetic model. The maximum adsorption capacity of the proposed magnetic sorbent was achieved to be 110.0 mg g−1 which shows the applicability of proposed sorbent for removal of disulfine blue dye from aqueous solution.

中文翻译：

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CoFe2O4@SiO2-聚乙烯亚胺磁性纳米粒子的合成与表征及其在超声波辅助去除水溶液中二亚硫酸蓝染料中的应用

摘要 在目前的工作中，采用一种简单的合成方法制备了 CoFe2O4@SiO2-聚乙烯亚胺磁性纳米粒子，作为一种有效的吸附剂，用于超声波辅助去除水溶液中的二亚硫酸蓝染料。对于制备的吸附剂的鉴定和表征，不同的分析包括傅里叶变换红外光谱 (FT-IR)、场发射扫描电子显微镜 (FE-SEM)、振动样品磁强计 (VSM)、能量色散 X 射线分析 (EDX) 和透射应用电子显微镜（TEM）。还评估了有效参数对去除二亚硫酸蓝的影响，例如 pH、吸附剂质量、超声波时间和二亚硫酸蓝浓度。所研究参数的最佳值如下：pH 5.0，吸附剂质量 0.015 g，5.0 分钟的超声时间和 10.0 mg L-1 的二亚硫酸蓝浓度。不同的等温线和动力学模型用于评价吸附的等温线和动力学。结果表明，Langmuir等温线模型优于其他等温线模型，并选择二阶方程模型作为动力学模型。所提出的磁性吸附剂的最大吸附容量达到 110.0 mg g-1，这表明所提出的吸附剂适用于从水溶液中去除二亚磺蓝染料。结果表明，Langmuir等温线模型优于其他等温线模型，并且选择二阶方程模型作为动力学模型。所提出的磁性吸附剂的最大吸附容量达到 110.0 mg g-1，这表明所提出的吸附剂适用于从水溶液中去除二亚磺蓝染料。结果表明，Langmuir等温线模型优于其他等温线模型，并且选择二阶方程模型作为动力学模型。所提出的磁性吸附剂的最大吸附容量达到 110.0 mg g-1，这表明所提出的吸附剂适用于从水溶液中去除二亚磺蓝染料。