naa a22 4500 510821006 CHVBK 20180411083531.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11814-013-0027-6 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0027-6 Adsorption behavior of U(VI)/Th(IV) by acid-leached red mud: A comparative study [Elektronische Daten] [Liu Zhirong, Xiong Huanjia, Zhou Shaoqi] Acid-leached red mud, a type of inorganic-adsorptive by-product of bauxite Bayer process via acid leaching, was used for the removal of U(VI)/Th(IV) from aqueous solutions. Variables of the adsorption such as contact time, temperature, solution pH, initial concentration and dose of acid-leached red mud were investigated. The results indicated that the adsorption is strongly affected by dosage, the solution pH, contact time and initial concentration. The isothermal data were fitted with both Langmuir and Freundlich equations, but the data fitted the former better than the latter. A pseudo-first-order kinetic model and pseudo-second-order kinetic model were used to describe the kinetic data, but the pseudo-second-order kinetic model was the better. Thermodynamic parameters such as enthalpy (ΔH ○ ), entropy (ΔS ○ ) and free energy change (ΔG ○ ) were calculated, and the negative ΔG ○ values of U(VI)/Th(IV) at different temperatures confirmed the adsorption processes were spontaneous. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Acid-leached Red Mud nationallicence U(VI)/Th(IV) nationallicence Adsorption nationallicence Isotherm nationallicence Kinetics nationallicence Zhirong Liu Key Laboratory of Nuclear Resources and Environment, East China Institute of Technology, Ministry of Education, 330013, Jiangxi, P. R. China aut Huanjia Xiong Department of Applied Chemistry, East China Institute of Technology, 344000, Jiangxi, P. R. China aut Shaoqi Zhou College of Environmental Science and Engineering, South China University of Technology, 510006, Guangdong, P. R. China aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/5(2013-05-01), 1091-1096 0256-1115 30:5<1091 2013 30 11814 https://doi.org/10.1007/s11814-013-0027-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0027-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhirong Liu Key Laboratory of Nuclear Resources and Environment, East China Institute of Technology, Ministry of Education, 330013, Jiangxi, P. R. China aut NATIONALLICENCE 700 1- Huanjia Xiong Department of Applied Chemistry, East China Institute of Technology, 344000, Jiangxi, P. R. China aut NATIONALLICENCE 700 1- Shaoqi Zhou College of Environmental Science and Engineering, South China University of Technology, 510006, Guangdong, P. R. China aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/5(2013-05-01), 1091-1096 0256-1115 30:5<1091 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer