Highly efficient enrichment and adsorption of rare earth ions (yttrium(III)) by recyclable magnetic nitrogen functionalized mesoporous expanded perlite |
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| Institution: | 1. Jiangxi Key Laboratory of Mining Engineering, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213000, China;1. Jiangxi Key Laboratory of Mining Engineering, School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;2. School of Mineral Processing and Bioengineering, Central South University, Changsha, China;1. Institute of Environmental Engineering and Research (IEER), University of Engineering and Technology (UET), Lahore 54890, Pakistan;2. Department of Petroleum and Gas Engineering, UET, Lahore, Pakistan;1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;2. Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A magnetic mesoporous expanded perlite-based (EPd-APTES@Fe3O4) composite was designed and synthesized as a novel adsorbent for enrichment of rare earth ions in aqueous solution. Effect of various factors including the pH of solution, contact time and adsorbent dosage on the adsorption behaviors of yttrium(III) by the EPd-APTES@Fe3O4 nano-material composites from aqueous solution was investigated. The maximum adsorption capacity of the as-prepared materials for yttrium(III) ions was 383.2 mg/g. Among the various isotherm models, the Freundlich isotherm model could well described for the adsorption of the rare earth ions at pH 5.5 and 298.15 K. The kinetic analysis indicated that the adsorption process followed the pseudo-second order kinetics model, and the rate-determining step might be chemical adsorption. Thermodynamic parameters declared that the adsorption process was endothermic. In addition, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and the quantum chemical calculation indicated that the yttrium(III) ions were captured on the EPd-APTES@Fe3O4 surface mainly by coordination with functional group of -NH2. More importantly, the adsorption-desorption studies indicated that the EPd-APTES@Fe3O4 nano-material composites had a high stability and good recyclability. |
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| Keywords: | Rare earth ions Yttrium(III) ions Magnetic mesoporous expanded perlite Enrichment Adsorption |
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