文献类型：期刊文献

英文题名：Synthesis of magnetic Fe3O4/CFA composites for the efficient removal of U(VI) from wastewater

作者：Chen, Zhongshan[1,2];Wang, Jian[1];Pu, Zengxin[1];Zhao, Yushan[1];Jia, Dashuang[1];Chen, Hongxia[1];Wen, Tao[1];Hu, Baowei[2];Alsaedi, Ahmed[3];Hayat, Tasawar[3];Wang, Xiangke[1,3,4]

机构：[1]North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[3]King Abdulaziz Univ, NAAM Res Grp, Fac Sci, Jeddah 21589, Saudi Arabia;[4]Soochow Univ, Sch Radiol & Interdisciplinary Sci, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China

年份：2017

卷号：320

起止页码：448

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000401202200046)、、EI(收录号：20171303493281)、Scopus(收录号：2-s2.0-85015984782)、WOS

基金：Financial support from the Science Challenge Project (JCKY2016212A504), National Natural Science Foundation of China (21607042, 21375148, 21577032), the National Special Water Programs (No. 2015ZX07203-011, No. 2015ZX07204-007), the Fundamental Research Funds for the Central Universities (2016MS02) and the Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection and the Priority Academic Program Development of Jiangsu Higher Education Institutions are acknowledged. X. Wang acknowledged the CAS Interdisciplinary Innovation Team of Chinese Academy of Sciences.

语种：英文

外文关键词：U(VI); Magnetic composites; Coal fly-ash; Sorption; Reduction

外文摘要：The application of thermal power plant waste (coal fly-ash, CFA) for the potential retention of U(VI) from wastewater was crucial in radionuclide contaminant management. In this work, magnetic Fe3O4/CFA composites were synthesized and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transformed infrared (FTIR) and energy dispersive (EDS) spectroscopy techniques. The as-synthesized Fe3O4/CFA composites were applied to remove U(VI) from aqueous solutions and the results showed that U(VI) sorption was mainly dominated by inner-sphere surface complexation at low pH values, and by outer-sphere surface complexation at high pH values. According to the results of X-ray photoelectron spectroscopy (XPS) and FTIR analysis, the high sorption of U(VI) on Fe3O4/CFA composites was mainly attributed to Fe-O bond. Compared with CFA (Q(max) = 0.254 mmol/g), Fe3O4/ CFA composites exhibited excellent U(VI) sorption capacity (Q(max) = 1.380 mmol/g), relative high and stable U(VI) sorption ability under high pH values (pH 6 similar to 10) in 0.1 M NaCl. The investigation was meaningful for the "treating wastewater with wastes" strategy implementation, especially in the aspect of reducing the environmental pollution caused by thermal power plant waste and their application in nuclear pollution management. (C) 2017 Published by Elsevier B.V.