Kinetics and thermodynamics modeling of Nd(Ⅲ) removal from aqueous solution using modified Amberlite XAD7
来源期刊：JOURNAL OF RARE EARTHS2020年第3期
论文作者：Petru Negrea ANDreea Gabor Corneliu Mircea Davidescu Mihaela Ciopec Adina Negrea Narcis Duteanu
文章页码：306 - 314
摘 要：New adso rbent 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.
Petru Negrea，ANDreea Gabor，Corneliu Mircea Davidescu，Mihaela Ciopec，Adina Negrea，Narcis Duteanu
Politehnica University of Timisoara,Faculty of Industrial Chemistry and Environmental Engineering
摘 要：New adso rbent 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.
关键词：
