期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 20, 期 4, 页码 1656-1664出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.08.013
关键词
PVA/TiO2 nano hybrid adsorbent; Amin groups; Casting; Cadmium(II); Nickel(II); Uranium(VI)
Sorption of Cd(II), Ni(II) and U(VI) ions onto a novel cast PVA/TiO2/APTES nanohybrid adsorbent with variations in adsorbent dose, pH, contact time, initial metal concentration and temperature has been investigated. The adsorbent were characterized by SEM and FTIR analysis. BET surface area, pore diameter and pore volume of adsorbent were 35.98 m(2) g(-1),3.08 nm and 0.059 cm(3) g(-1), respectively. The kinetic and equilibrium data were accurately described by the double-exponential and Freundlich models for all metals. The maximum sorption capacities were 49.0, 13.1 and 36.1 mg g(-1) for Cd(II), Ni(II) and U(VI) ions with pH of 5.5, 5 and 4.5, respectively. Thermodynamic studies showed that the sorption process was favored at higher temperature. The adsorbent can be easily regenerated after 5 cycles of sorption-desorption. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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