文献类型：期刊文献

英文题名：Constructing new Fe3O4@MnOx with 3D hollow structure for efficient recovery of uranium from simulated seawater

作者：Zhang, Tingting[1,2];Chen, Jiemin[1];Xiong, Huiyan[1,2];Yuan, Zongdi[1];Zhu, Yuling[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Coll Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Civil Engn, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2021

卷号：283

外文期刊名：CHEMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:000692107700002)、、WOS

基金：This work is financially supported by 2020 National College Students' innovation and entrepreneurship training program of China (202010349024) .

语种：英文

外文关键词：Uranium; Fe3O4@MnOx; Sorption; Seawater

外文摘要：Enrichment of uranium from seawater is a promising method for addressing the energy crisis. Current technologies are generally not effective for enriching uranium from seawater because its concentration in seawater is low. In this study, new Fe3O4@MnO(x )with 3D hollow structure, which is capable of enriching low concentration uranium, was prepared via a novel redox etching method. The physicochemical characteristics of Fe3O4@MnOx were studied with TEM, HRTEM, SEAD, FTIR, XRD, and N-2 adsorption-desorption analysis. Dynamic kinetic studies of different initial U(VI) concentrations revealed that the pseudo-second-order model fit the sorption process better, and the sorption rates of Fe3O4@MnOx in 1, 10, and 25 mg/L U(VI) solution were 0.0124, 0.00298, and 0.000867 g/mginin, respectively. Isothermal studies showed that the maximum sorption amounts were 50.09, 56.27, and 64.62 mg/g for 1, 10, and 25 mg/L U(VI), respectively, at pH 5.0 and 313 K, suggesting that Fe3O4@MnOx could effectively enrich low concentration U(VI) from water. The sorption amount of U(VI) did not significantly decrease in the presence of Na+, Mg2+, and Ca2+. HRTEM, FTIR, and XPS results demon-strated that Fe(II) and Mn/Fe-O-H active sites in Fe3O4@MnOx were accounted for the high and specific enrichment efficiency. A column experiment was conducted to evaluate the U(VI) sorption efficiency of Fe3O4@MnOx in simulated seawater. The U(VI) sorption efficiency remained above 80% in 28 days run. Our findings demonstrate that Fe3O4@MnOx has extraordinary potential for the enrichment of uranium from simulated seawater.