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Chelating resins supporting dithiocarbamate and methylthiourea groups in adsorption of heavy metal ions
Author(s) -
Lezzi A.,
Cobianco S.
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070540708
Subject(s) - dithiocarbamate , chemistry , chelation , adsorption , thiourea , metal ions in aqueous solution , ethylene glycol , metal , polymer chemistry , nuclear chemistry , inorganic chemistry , organic chemistry
Two different sulfur atom containing functional groups were introduced into poly(styrene‐ g ‐ethylene glycols), PSR‐ET (13) OH, consisting of a cross‐linked polystyrene backbone grafted with linear poly(ethylene glycol) chains. Reaction of an amino derivative of the polymeric substrate with carbon disulfide and methylisothiocyanate produced new chelating resins of dithiocarbamate type, PSR‐ET (13) CS 2 Na, and methylthiourea type, PSR‐ET (13) TU, respectively. The adsorption behavior of these resins was studied toward Hg(II), Cd(II), Cu(II), and Pb(II) ions in different experimental conditions. The order of metal adsorption for dithiocarbamate‐supported resins was Hg(II) > Pb(II) ≫ Cd(II) > Cu(II) and for methylthiourea‐supported resins was Hg(II) ≫ Cu(II) > Cd(II) ≫ Pb(II). Different regeneration methods were performed with the dithiocarbamate and methylthiourea resins; the former was regenerated by complete mineralization of the metal complexes, the latter by treatment with a solution of 6 N HCl and 10% of thiourea. © 1994 John Wiley & Sons, Inc.