"1"^^ . "RIV/61389005:_____/05:00032032" . "P(IAA3111306), Z(AV0Z10480505)" . . "Sorbents of toxic metals based on low-rank coal and chitosan" . "Abstract Book" . . . "Boreck\u00E1, Lenka" . . "Machovi\u010D, Vladim\u00EDr" . "4"^^ . . "1"^^ . "325" . . . "Sorbenty toxick\u00FDch kov\u016F na b\u00E1zi hn\u011Bd\u00E9ho uhl\u00ED a chitosanu"@cs . "Sorption of Cs, Co and Eu on coal (oxihumolite and its parent lignite artificially oxidized to increase degree of oxygen functionalities) in mixture with chitosan was studied using radiotracer method. Distribution coefficients (Kd) increasing in the order Cs < Co < Eu reflected increasing charge of a metal cation and its increasing ability of complexation with coal humic substance(HS). In acidic media, Kds increased with pH due to dissociation of the HS binding sites. In neutral media, Kds of Eu (for oxihumolite also Co) decreased with pH due to formation of soluble HS complexes. An improved sorption efficiency of the coal sorbents at neutral pH was obtained in mixture with chitosan, namely for oxihumolite at sorption of Eu and Co. Addition of chitosan prevents deterioration of the sorption ability probably via removing the HS complexes from solution by formation of an insoluble complex with chitosan."@en . "Sorbenty toxick\u00FDch kov\u016F na b\u00E1zi hn\u011Bd\u00E9ho uhl\u00ED a chitosanu"@cs . "Mizerov\u00E1, Gabriela" . "coal; humic substances; chitosan"@en . "Sorbents of toxic metals based on low-rank coal and chitosan" . "[1C11515741FC]" . . . "543568" . "Sorption of Cs, Co and Eu on coal (oxihumolite and its parent lignite artificially oxidized to increase degree of oxygen functionalities) in mixture with chitosan was studied using radiotracer method. Distribution coefficients (Kd) increasing in the order Cs < Co < Eu reflected increasing charge of a metal cation and its increasing ability of complexation with coal humic substance(HS). In acidic media, Kds increased with pH due to dissociation of the HS binding sites. In neutral media, Kds of Eu (for oxihumolite also Co) decreased with pH due to formation of soluble HS complexes. An improved sorption efficiency of the coal sorbents at neutral pH was obtained in mixture with chitosan, namely for oxihumolite at sorption of Eu and Co. Addition of chitosan prevents deterioration of the sorption ability probably via removing the HS complexes from solution by formation of an insoluble complex with chitosan." . "RIV/61389005:_____/05:00032032!RIV06-AV0-61389005" . "Sorbents of toxic metals based on low-rank coal and chitosan"@en . . "Mizera, Ji\u0159\u00ED" . . . "Izmir" . . . "2005-05-22+02:00"^^ . . . "Ku\u015Fadasi" . . "Ege University" . . "Sorbents of toxic metals based on low-rank coal and chitosan"@en . "Sorpce Cs, Co a Eu na uhl\u00ED (oxihumolitu a jeho mate\u0159sk\u00E9m lignitu s obsahem kysl\u00EDkat\u00FDch skupin um\u011Ble zv\u00FD\u0161en\u00FDm oxidac\u00ED) byla studov\u00E1na radiostopovac\u00ED metodou. Distribu\u010Dn\u00ED koeficienty (Kd) rostly v po\u0159ad\u00ED Cs < Co < Eu v souladu s rostouc\u00EDm n\u00E1bojem kationtu kovu a jeho rostouc\u00ED schopnosti komplexace s uheln\u00FDmi huminov\u00FDmi l\u00E1tkami (HS). V kysel\u00E9 oblasti Kd rostly s pH d\u00EDky disociaci vazebn\u00FDch m\u00EDst HS. V neutr\u00E1ln\u00ED oblasti Kd Eu (u oxihumolitu i Co)klesaly s pH vzhledem ke tvorb\u011B rospustn\u00FDch komplex\u016F s HS. V neutr\u00E1ln\u00ED oblasti se sorp\u010Dn\u00ED \u00FA\u010Dinnost uheln\u00FDch sorbent\u016F zv\u00FD\u0161ila ve sm\u011Bsi s chitosanem, zejm\u00E9na u oxihumolitu p\u0159i sorpci Eu a Co. P\u0159\u00EDdavek chitosanu zabra\u0148uje sn\u00ED\u017Een\u00ED sorp\u010Dn\u00ED schopnosti z\u0159ejm\u011B odstran\u011Bn\u00EDm komplex\u016F s HS z roztoku p\u0159i tvorb\u011B nerozpustn\u00E9ho komplexu s chitosanem."@cs . "975-483-670-1" .