caa a22 4500 463170431 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10450-007-9050-4 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9050-4 Adsorption and desorption of binary mixtures of copper and mercury ions on natural and crosslinked chitosan membranes [Elektronische Daten] [R. Vieira, E. Guibal, E. Silva, M. Beppu] Copper and mercury ion adsorption on chitosan membranes was investigated in batch systems (with both single and binary solutions). The Langmuir model and its extensions (extended Langmuir, Jain-Snoeyink, and Langmuir-Freundlich models) were tested for the modeling of experimental data. Chitosan membranes presented more affinity for Hg ions than for Cu ions. The decrease of the amount of metal adsorbed on natural chitosan in binary systems (compared to single-metal solutions) showed the competition effects between the two metal ions. For glutaraldehyde-crosslinked chitosan and epichlorohydrin-crosslinked chitosan, the mixture effect was present, producing unexpected result such as higher adsorption capacities, when compared to the monocomponent solution of each metal. The desorption of the metals was also investigated, and copper and mercury ions could be selectively recovered using a combined process by using NaCl and H2SO4 as eluant. Springer Science+Business Media, LLC, 2007 Copper nationallicence Mercury nationallicence Chitosan nationallicence Multicomponent adsorption nationallicence b i : heterogeneity parameter for each component, dimensionless nationallicence C : concentration of the singe component at equilibrium, mmol⋅L−1 nationallicence C i : concentration of each component at equilibrium, mmol⋅L−1 nationallicence E i : root mean square error nationallicence K : monocomponent Langmuir adsorption constant of the single component, L⋅mmol−1 nationallicence K i : individual Langmuir adsorption constant of each component, L⋅mmol−1 nationallicence Q : adsorbed amount of the single component per gram of dried chitosan membrane at equilibrium, mmol⋅g−1 dry chitosan nationallicence Q i : adsorbed amount of each component per gram of dried chitosan membrane at equilibrium, mmol⋅g−1 dry chitosan nationallicence Q max  : maximum adsorbed amount of the single component per gram of dried chitosan membrane at equilibrium, mmol⋅g−1 dry chitosan nationallicence Q max , i : maximum adsorbed amount of each component per gram of dried chitosan membrane at equilibrium, mmol⋅g−1 dry chitosan nationallicence Q i mod  : calculated maximum amount adsorbed of each component adsorbed nationallicence n : number of experimental data nationallicence R 2 : adjustment coefficients from minimum square method for Langmuir model nationallicence Vieira R. Dep. de Termofluidodinamica, Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas, SP, Brazil aut Guibal E. Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès, Alès Cedex, France aut Silva E. Departamento de Engenharia Química, Universidade Estadual do Oeste do Paraná, Toledo, SP, Brazil aut Beppu M. Dep. de Termofluidodinamica, Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas, SP, Brazil aut Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 603-611 0929-5607 13:5-6<603 2007 13 10450 https://doi.org/10.1007/s10450-007-9050-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9050-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vieira R. Dep. de Termofluidodinamica, Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Guibal E. Laboratoire Génie de l'Environnement Industriel, Ecole des Mines d'Alès, Alès Cedex, France aut NATIONALLICENCE 700 1- Silva E. Departamento de Engenharia Química, Universidade Estadual do Oeste do Paraná, Toledo, SP, Brazil aut NATIONALLICENCE 700 1- Beppu M. Dep. de Termofluidodinamica, Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas, SP, Brazil aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 603-611 0929-5607 13:5-6<603 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer