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Electrochemical Investigation of Binding of Heavy Metal Ions to Turkish Lignites
Author(s) -
Pehlivan Erol,
Richardson Amie,
Zuman Petr
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302949
Subject(s) - adsorption , metal ions in aqueous solution , desorption , ion , electrochemistry , metal , chemistry , coal , polarography , inorganic chemistry , particle size , electrode , organic chemistry
Adsorption and desorption of Cu 2+ , Pb 2+ , Cd 2+ , Ni 2+ and Zn 2+ ions on samples of lignites (young brown coal) from three areas in the vicinity of Konya (Anatolia, Turkey) were followed using the polarographic method of analysis. This method enables the determination of free metal ions in suspensions containing both small and colloidal particles of lignite. Effects of pH, nature of the metal ion, and origin of the lignite on its adsorption capacity were followed. Binding is only between 5 and 30% reversible, indicating that ion exchange is not the predominant factor. The role of the size and shape of cavities inside pulverized lignite and of the functional groups inside these cavities was considered.