title: Sorption of metal ions on lignite and the derived humic substances.
abstract: The study presents results of sorption of metal ions (Pb2+, Zn2+, Cu2+, and Cd2+) onto lignite mined in South Moravia, Czech Republic, and solid humic substances (humin and humic acid) derived from it. The efficiency of these sorbents has been studied as a function of contact time, solution pH, and metal concentration. The sorption efficiencies were higher for humin and lower for humic acid samples than for the original lignite. With its high sorption capacities of several mmol/g, particularly for Pb2+ and Cd2+, the South Moravian lignite can provide a cheap source material for preparation of sorbents utilizable in removal of toxic metals from wastewaters.
authors.affiliation: Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, V Holesovickách 41, 182 09 Prague 8, Czech Republic. havelcova@irsm.cas.cz
authors.forename: Martina
authors.initials: M
authors.lastname: Havelcová
authors.forename: Jirí
authors.initials: J
authors.lastname: Mizera
authors.forename: Ivana
authors.initials: I
authors.lastname: Sýkorová
authors.forename: Miloslav
authors.initials: M
authors.lastname: Pekar
mesh_terms: D000327:Adsorption; D003031:Coal; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D013696:Temperature
chemical_list: D003031:Coal; D006812:Humic Substances; D007477:Ions; D008670:Metals