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Controlled incorporation of heavy metals from aqueous solutions and their electrorelease using composite polypyrrole films
Author(s) -
Hepel Maria,
Dentrone Laura
Publication year - 1996
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.1140081105
Subject(s) - polypyrrole , quartz crystal microbalance , electrochemistry , aqueous solution , catechol , composite number , metal ions in aqueous solution , metal , conductive polymer , inorganic chemistry , materials science , matrix (chemical analysis) , polymer , ion , ion exchange , chemistry , chemical engineering , electrode , composite material , metallurgy , organic chemistry , adsorption , engineering
Abstract Composite polypyrrole/catechol films with cation‐exchange properties have been prepared by electropolymerization on AT‐cut 10 MHz gold piezoelectrodes at constant potential. The use of the electrochemical quartz crystal microbalance allowed us to diagnose the type of ion dynamics in these films. Incorporation of a variety of heavy metals was feasible by applying potentials more negative than −200mV (vs. SCE). Regeneration of these films was performed by releasing these metals into the solution during the reverse potential step. Incorporation of the following metal ions Pb II , Cd II , Co II , and Ni II into polymer matrix was found even in the presence of large excess of sodium ions.