title: Adsorption of uranium by amidoximated chitosan-grafted polyacrylonitrile, using response surface methodology.
abstract: The amidoximated chitosan-grafted polyacrylonitrile (CTS-g-PAO) was prepared for the adsorption of uranium from water. The effects of pH, concentration of uranium and the solid-liquid ratio on the adsorption of uranium by CTS-g-PAO were optimized using Doehlert design of response surface methodology (RSM). The adsorption capacity and removal efficiency achieved 312.06 mg/g and 86.02%, respectively. The adsorption process attained equilibrium only in 120 min. More than 80% of the absorbed uranium could be desorbed by 0.1 mol/l HCl or EDTA-Na, and CTS-g-PAO could be reused at least 3 times. The CTS-g-PAO and U(VI) ions formed a chelate complex due to FTIR spectral analysis. The surface morphology of CTS-g-PAO was also investigated by SEM. The adsorption process was better described by Langmuir isotherm and pseudo second order kinetic model. Results obtained indicated that CTS-g-PAO was very promising in adsorption of uranium from water.
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China.
authors: Chao
authors: C
authors: Xu
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China.
authors: Jingjing
authors: J
authors: Wang
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China.
authors: Tilong
authors: T
authors: Yang
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China.
authors: Xia
authors: X
authors: Chen
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China.
authors: Xunyue
authors: X
authors: Liu
authors: Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310029, PR China. Electronic address: dingxch@zju.edu.cn.
authors: Xingcheng
authors: X
authors: Ding
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D000704:Analysis of Variance; D048271:Chitosan / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D010091:Oximes / Q000737:chemistry*; D014501:Uranium / Q000737:chemistry* / Q000302:isolation & purification; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D000180:Acrylic Resins; D010091:Oximes; D014874:Water Pollutants, Chemical; D014867:Water; C010504:polyacrylonitrile; D014501:Uranium; D048271:Chitosan
keywords: Acrylonitrile (PubChem CID: 7855); Amidoxime; Chitosan; Chitosan (PubChem CID: 71853); Hydroxylamine hydrochloride (PubChem CID: 443297); Polyacrylonitrile; Response surface methodology (RSM); Uranium; Uranylnitrate hexhydrate (PubChem CID: 61640)