Selective adsorption of lead(II) from aqueous solution by ion-imprinted PEI-functionalized silica sorbent: studies on equilibrium isotherm, kinetics, and thermodynamics
作者： Mingxuan Liu , Yang Sun , Sibo Na , Feng Yan , None
DOI: 10.1080/19443994.2014.984342
关键词:
摘要: AbstractA new ion-imprinted poly(ethyleneimine)(PEI)-functionalized silica sorbents were synthesized by a hydrothermal-assisted surface grafting technique with Pb(II) as the template, PEI functional molecular, and epichlorohydrin cross-linking agent for selective adsorption of from aqueous solution, was characterized FTIR, SEM, TGA-DTA, nitrogen adsorption, static batch experiment. Static experiment results showed that Pb(II)-imprinted PEI-functionalized had high capacity 60.4 mg g−1, reached an equilibrium state within 20 min, displayed stable ability ions in range pH 4–8, satisfactory selectivity toward could be used repeatedly. Compared Freundlich Dubinin–Radushkevich isotherms, data fitted to Langmuir model. The kinetic process followed pseudo-second-order model compared pseudo-first-order, Elovich intraparticle diffu...
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