Darvishi Cheshmeh Soltani Reza, Safari Mahdi, Maleki Afshin, Rezaee Reza, Shahmoradi Behzad, Shahmohammadi Siran, Ghahramani Esmail
Department of Environmental Health, School of Health, Arak University of Medical Sciences, Arak, Iran.
Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
Environ Sci Pollut Res Int. 2017 Jun;24(17):15157-15166. doi: 10.1007/s11356-017-9128-9. Epub 2017 May 13.
The application of a novel nanocomposite synthesized through the combination of FeO nanoparticles and bone char particles for the adsorption of As(V) ions in the aquatic medium was investigated. As-prepared nanocomposite was immobilized by using chitosan biopolymer. The characterization of the nanocomposite was performed via SEM, XRD, FT-IR, and BET together with the determination of zero-point charge of the adsorbent surface. As results, the obtained experimental data were fitted well with pseudo-first-order kinetic model (R = 0.997) and Langmuir isotherm model (R = 0.990) with the maximum adsorption capacity of about 112 μg/g. Increasing the dosage of nanocomposite and initial solute concentration led to increasing the adsorption capacity of As(V) ions, while decreasing the solution temperature resulted in the enhanced adsorption process. According to the results of thermodynamic study, the adsorption of As(V) ions onto the nanocomposite was spontaneous and exothermic in nature.
研究了通过将FeO纳米颗粒和骨炭颗粒结合合成的新型纳米复合材料在水介质中吸附As(V)离子的应用。制备的纳米复合材料用壳聚糖生物聚合物固定。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和比表面积分析仪（BET）对纳米复合材料进行表征，并测定吸附剂表面的零电荷点。结果表明，所得实验数据与准一级动力学模型（R = 0.997）和朗缪尔等温线模型（R = 0.990）拟合良好，最大吸附容量约为112 μg/g。增加纳米复合材料的用量和初始溶质浓度会导致As(V)离子的吸附容量增加，而降低溶液温度会增强吸附过程。根据热力学研究结果，As(V)离子在纳米复合材料上的吸附是自发的且本质上是放热的。
