ABSTRACT

It is very important to develop effective and reusable functional materials for arsenic removal from water. In this study, one carbon fiber nanocomposite mat modified with ceria oxide nanoparticles was successfully prepared by electrospinning. The adsorption performances of the composite for different arsenic species were systematically investigated. The composite possessed good performance for selective adsorption of As^Ⅴ at pH 12 without obvious coexisting ion interference effects. The adsorption processes fitted well with the quasi-first-order dynamics and Langmuir isotherm models. The composite mat is stable and reusable, and can be easily isolated from water after use. The prepared composites were characterized by scanning electron microscope and energy-dispersive spectroscope (SEM-EDS), x-ray diffraction spectrometry (XRD) and Fourier transform infrared spectrum (FTIR), and the possible adsorption mechanism was also discussed.

摘要

开发有效且可重复使用的功能材料用于去除水中的砷非常重要。在这项研究中，通过静电纺丝成功制备了一种用氧化铈纳米粒子改性的碳纤维纳米复合垫。系统研究了复合材料对不同砷种类的吸附性能。复合具有良好的性能。作为选择性吸附^Ⅴ在 pH 12 时没有明显的共存离子干扰效应。吸附过程与准一级动力学和朗缪尔等温线模型非常吻合。复合垫稳定且可重复使用，使用后可轻松与水隔离。采用扫描电子显微镜和能谱仪（SEM-EDS）、X射线衍射仪（XRD）和傅里叶变换红外光谱（FTIR）对制备的复合材料进行了表征，并探讨了可能的吸附机理。