Kinetics and thermodynamics modeling of Nd(III) removal from aqueous solution using modified Amberlite XAD7 |
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| Affiliation: | 1. Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, School of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China;2. School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;3. Baotou Research Institute of Rare Earths, Baotou 014030, China;4. Department of Electrical and Computer Engineering, CM3IC, Northeastern University, Boston, MA 02115, USA;1. Laboratory of Advanced Materials, National School of Engineers of Sfax, University of Sfax, Tunisia;2. Institut Charles Gerhardt, ENSCM, “Advanced Materials for Health and Catalysis”, 240 Av Professor Emile Jeanbrau, 34296 Montpellier, France;1. Hot Laboratories Centre, Atomic Energy Authority, Cairo 13759, Egypt;2. Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt;1. Department of Physics and Chemistry, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad, 500075, India;2. Faculty of Science and Technology, The ICFAI Foundation for Higher Education, Donthanapally, Shankarapalli Road, Hyderabad, 501203, India;3. Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea;1. Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-Agriculture, Yancheng Teachers University, Yancheng 224007, PR China;2. School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, PR China;3. School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, PR China;1. Chinese Academy of Sciences (CAS) Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | New adsorbent material was obtained by modification of commercial Amberlite XAD7 with thiourea that represents a non-toxic, cheap and environmentally friendly extractant. Prepared adsorbent was used for removal of neodymium ions from aqueous solutions. Thiourea modified Amberlite involved in this study shows good adsorption capacities (74.3 mg/g) and excellent efficiency during Nd removal process. In order to elucidate the mechanism of the Nd adsorption process kinetic, thermodynamic and equilibrium studies were performed, establishing this way which kinetic model better describes the Nd adsorption process. Moreover the thermodynamic studies prove that the Nd adsorption on thiourea modified Amberlite XAD7 is an endothermic and spontaneous process. |
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| Keywords: | Neodymium Amberlite XAD7 Adsorption mechanism Adsorption isotherm Thiourea Rare earths |
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