Dil Ebrahim Alipanahpour, Ghaedi Mehrorang, Asfaram Arash, Mehrabi Fatemeh
Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
Ultrason Sonochem. 2017 May;36:409-419. doi: 10.1016/j.ultsonch.2016.12.016. Epub 2016 Dec 16.
Magnetic γ-FeO nanoparticles modificated by bis(5-bromosalicylidene)-1,3-propandiamine (M-γ-FeO-NPs-BBSPN) and characterized by field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). This modified compound as novel adsorbent was applied for the ultrasound-assisted removal of Pb ion in combination with flame atomic absorption spectroscopy (FAAS). The influences of the effective parameters including initial Pb ion concentration, pH, adsorbent mass and ultrasound time were optimized by central composite design (CCD). Maximum removal percentage of Pb ion which obtained at 25mgL of Pb, 25mg of adsorbent and 4min mixing with sonication at pH 6.0. The precision of the equation obtained by CCD was confirmed by the analysis of variance and calculation of correlation coefficient relating the predicted and the experimental values of removal percentage of Pb ion. The kinetic and isotherm of ultrasound-assisted removal of Pb ion was well described by second-order kinetic and Langmuir isotherm model with maximum adsorption capacity of 163.57mgg.
由双（5-溴水杨醛）-1,3-丙二胺修饰的磁性γ-FeO纳米颗粒（M-γ-FeO-NPs-BBSPN），并通过场发射扫描电子显微镜（FE-SEM）、傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）进行表征。这种改性化合物作为新型吸附剂，结合火焰原子吸收光谱法（FAAS）用于超声辅助去除铅离子。通过中心复合设计（CCD）优化了初始铅离子浓度、pH值、吸附剂质量和超声时间等有效参数的影响。在pH 6.0时，铅离子浓度为25mg/L、吸附剂质量为25mg且超声混合4分钟的条件下，获得了最大去除率。通过方差分析和计算铅离子去除率预测值与实验值之间的相关系数，证实了由CCD得到的方程的精度。超声辅助去除铅离子的动力学和等温线用二级动力学和朗缪尔等温线模型很好地描述，最大吸附容量为163.57mg/g。
