WANG Ling-Hang;QIU Zhi-Hua;CHI Li-Sheng;College of Chemistry,Fuzhou University;Fujian Province Joint Innovation Key Laboratory of Fuel and Materia in Clean Nuclear Energy System,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences;
College of Chemistry,Fuzhou University;Fujian Province Joint Innovation Key Laboratory of Fuel and Materia in Clean Nuclear Energy System,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences;
Adsorbent has been widely used for the recovery and enrichment of rare metals from waste water.Herein,a graphene-based adsorbent,graphene oxide/Fe_3O_4 (GO/Fe_3O_4) nanocomposite,was prepared by a facile hydrothermal method,and characterized by X-ray diffraction,Scanning Electron Microscope,X-ray Photoelectron Spectroscopy,Zeta potential and magnetization.The material has been explored for the recovery of In from simulated waste water.The test results show that the nanocomposite has a reasonable adsorption capacity on indium in a wide pH range,e.g.,the adsorption percent and quantity of In(Ⅲ) from the aqueous solutions at pH=4 and C_0=50 mg·L~(-1) are 91%and 43.98 mg·L~(-1),respectively.In addition,the nanocomposites maintain a 75.5%cycling capacity and a 71%removal efficiency after five continuous cycles due to their novel properties of high specific surface area and superparamagnetism.The pseudo-second-order adsorption model can be used to interpret the kinetic data.High adsorption efficiency and good reusability can make the nanocomposite a promising adsorbent for recovery of In(Ⅲ).
adsorbent;;graphene oxide;;Fe_3O_4 magnetic nanoparticles(NPs);;nanocomposites;;In(Ⅲ)
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