Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins
The strong species of cadmium(II), copper(II), manganese(II) and nickel(II) in an Antarctic seawater sample are investigated by a method based on the sorption of metal ions on complexing resins. The resins compete with the ligands present in the sample to combine with the metal ions. Two resins with...
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ftunivpavia:oai:iris.unipv.it:11571/137540 2024-04-14T08:04:28+00:00 Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins BIESUZ, RAFFAELA ALBERTI, GIANCARLA D'AGOSTINO, GIROLAMO PESAVENTO, MARIA MAGI E. Biesuz, Raffaela Alberti, Giancarla D'Agostino, Girolamo Magi, E. Pesavento, Maria 2006 STAMPA http://hdl.handle.net/11571/137540 eng eng info:eu-repo/semantics/altIdentifier/wos/000239849400003 volume:101 firstpage:180 lastpage:189 numberofpages:10 journal:MARINE CHEMISTRY http://hdl.handle.net/11571/137540 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33746441486 Natural ligands in seawater Speciation of metal ion Resin titration Seawater info:eu-repo/semantics/article 2006 ftunivpavia 2024-03-21T15:53:35Z The strong species of cadmium(II), copper(II), manganese(II) and nickel(II) in an Antarctic seawater sample are investigated by a method based on the sorption of metal ions on complexing resins. The resins compete with the ligands present in the sample to combine with the metal ions. Two resins with different adsorbing strengths were used. Very stable metal complexes were investigated with the strong sorbent Chelex 100 and weaker species with the less strong resin, Amberlite CG-50. Strong species were detected for three of the considered metal ions, but not for Mn(II). Cu(II) is completely linked to species with a side reaction coefficient as high as log αM(I)=11.6 at pH=7.3. The ligand concentration was found to be similar to that of the metal ion, and the conditional stability constant was around 1020 M−1. In the considered sample, only a fraction of the metal ions Cd(II) and Ni(II) is bound to the strong ligands, with side reaction coefficients equal to log αM(I)=5.5 and 6.5 at pH=7.3 for Cd(II) and Ni(II), respectively. These findings were confirmed by the test with the weaker sorbent Amberlite G-50. It can be calculated from the sorption equilibria that neither Mn(II) nor Ni(II) is adsorbed on Amberlite CG-50 under the considered conditions and, in fact, only a negligible fraction of Mn(II) and Ni(II) was adsorbed. A noticeable fraction of Cd(II) was adsorbed on Amberlite CG-50, meaning that cadmium(II) is partially linked to weak ligands, possibly chloride, while no copper(II) was adsorbed on this resin, confirming that copper(II) is only combined in strong species. These results are similar, but not identical, to those obtained for other seawater samples examined in previous investigations. Article in Journal/Newspaper Antarc* Antarctic IRIS UNIPV (Università degli studi di Pavia) Antarctic |
institution |
Open Polar |
collection |
IRIS UNIPV (Università degli studi di Pavia) |
op_collection_id |
ftunivpavia |
language |
English |
topic |
Natural ligands in seawater Speciation of metal ion Resin titration Seawater |
spellingShingle |
Natural ligands in seawater Speciation of metal ion Resin titration Seawater BIESUZ, RAFFAELA ALBERTI, GIANCARLA D'AGOSTINO, GIROLAMO PESAVENTO, MARIA MAGI E. Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
topic_facet |
Natural ligands in seawater Speciation of metal ion Resin titration Seawater |
description |
The strong species of cadmium(II), copper(II), manganese(II) and nickel(II) in an Antarctic seawater sample are investigated by a method based on the sorption of metal ions on complexing resins. The resins compete with the ligands present in the sample to combine with the metal ions. Two resins with different adsorbing strengths were used. Very stable metal complexes were investigated with the strong sorbent Chelex 100 and weaker species with the less strong resin, Amberlite CG-50. Strong species were detected for three of the considered metal ions, but not for Mn(II). Cu(II) is completely linked to species with a side reaction coefficient as high as log αM(I)=11.6 at pH=7.3. The ligand concentration was found to be similar to that of the metal ion, and the conditional stability constant was around 1020 M−1. In the considered sample, only a fraction of the metal ions Cd(II) and Ni(II) is bound to the strong ligands, with side reaction coefficients equal to log αM(I)=5.5 and 6.5 at pH=7.3 for Cd(II) and Ni(II), respectively. These findings were confirmed by the test with the weaker sorbent Amberlite G-50. It can be calculated from the sorption equilibria that neither Mn(II) nor Ni(II) is adsorbed on Amberlite CG-50 under the considered conditions and, in fact, only a negligible fraction of Mn(II) and Ni(II) was adsorbed. A noticeable fraction of Cd(II) was adsorbed on Amberlite CG-50, meaning that cadmium(II) is partially linked to weak ligands, possibly chloride, while no copper(II) was adsorbed on this resin, confirming that copper(II) is only combined in strong species. These results are similar, but not identical, to those obtained for other seawater samples examined in previous investigations. |
author2 |
Biesuz, Raffaela Alberti, Giancarla D'Agostino, Girolamo Magi, E. Pesavento, Maria |
format |
Article in Journal/Newspaper |
author |
BIESUZ, RAFFAELA ALBERTI, GIANCARLA D'AGOSTINO, GIROLAMO PESAVENTO, MARIA MAGI E. |
author_facet |
BIESUZ, RAFFAELA ALBERTI, GIANCARLA D'AGOSTINO, GIROLAMO PESAVENTO, MARIA MAGI E. |
author_sort |
BIESUZ, RAFFAELA |
title |
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
title_short |
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
title_full |
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
title_fullStr |
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
title_full_unstemmed |
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins |
title_sort |
determination of cadmium(ii), copper(ii), manganese(ii) and nickel(ii) species in antarctic seawater with complexing resins |
publishDate |
2006 |
url |
http://hdl.handle.net/11571/137540 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000239849400003 volume:101 firstpage:180 lastpage:189 numberofpages:10 journal:MARINE CHEMISTRY http://hdl.handle.net/11571/137540 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33746441486 |
_version_ |
1796300990318641152 |