Book ChapterDOI
Voltammetric Determination of the Stability Constants of the Predominant Labile Lead Complexes in Sea Water
L. Sipos,P. Valenta,H.W. Nürnberg,M. Branica +3 more
- pp 61-76
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TLDR
In this article, the results of a single sweep voltammetry and a particular semiautomated ASV-procedure have established that the two labile complexes of Pb(II) prevailing in the sea are [PbCO 3 ] and [pb (CO 3 ) 2 ] 2−.Abstract:
Traces of heavy metals and other toxic trace metals occur dissolved in the sea mainly in form of labile inorganic complex species with the anionic constituents of sea water as ligands. Therefore, the identification of the preferentially by the respective metal formed complex species, their physicochemical characterization and the determination of their stability constants are important actual topics in marine trace metal chemistry. Suitable polarographic and voltammetric methods, provide a rather unique access to this kind of speciation problems. Experimental data obtained in aqueous model solutions with I of 0.7 and in artificial sea water by single sweep voltammetry and by a particular semiautomated ASV-procedure have established that the two labile complexes of Pb(II) prevailing in the sea are [PbCO 3 ] and [Pb (CO 3 ) 2 ] 2− .read more
Citations
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BookDOI
Complexation of trace metals in natural waters
C. J. M. Kramer,J. C. Duinker +1 more
TL;DR: In this article, a new approach to determination of trace metal complexation in natural waters, based on the voltammetric analysis of the inert metal complex, is proposed, which can evaluate the complexing capacity and apparent stability constant of the formed metal complex.
Journal ArticleDOI
Comparative studies on the distribution of heavy metals in the oceans and coastal waters
TL;DR: Applying reliable sampling methods and the voltammetric determination procedure in particular suitable for heavy metals at the trace level, significant contributions to a consistent data basis for the distribution of heavy metals in the sea could be achieved.
Journal ArticleDOI
Distribution of Cd, Pb and Cu between the dissolved and particulate phase in the Eastern Scheldt and Western Scheldt estuary
TL;DR: In this paper, the distribution of the potentially ecotoxic heavy metals Cd, Pb and Cu between the dissolved and the particulate matter phase has been studied in the Oosterscheldt and Westerschelft estuaries, The Netherlands, in five missions during the spring, summer and winter of 1979-1980.
Journal ArticleDOI
Investigations on heavy metal speciation in natural waters by voltammetric procedures
TL;DR: The potentialities for diagnostic measurements and for specific studies on the effects of physicochemical parameters of natural waters on heavy metal species are presented in this article, where the type and size of the obtainable information and resulting conclusions of the fate of heavy metals in natural waters are indicated.
Journal ArticleDOI
Comparative studies on trace metal levels in marine biota: III. Typical levels and accumulation of toxic trace metals in muscle tissue and organs of marine organisms from different European seas
M. Stoeppler,H.W. Nürnberg +1 more
TL;DR: The mean values obtained related to fresh weight for krill muscle meat, krill products and fillets of antarctic fish confirm the absence of toxic risks for human food and should be more suitable as a protein rich animal feed.
References
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Journal ArticleDOI
Preparation of artificial seawater1
Journal ArticleDOI
The Determination of Consecutive Formation Constants of Complex Ions from Polarographic Data
Donald D. DeFord,David N. Hume +1 more
Journal ArticleDOI
A pH-DEPENDENT MODEL FOR THE CHEMICAL SPECIATION OF COPPER, ZINC, CADMIUM, AND LEAD IN SEAWATER
Alberta Zirino,Sachio Yamamoto +1 more
TL;DR: A pH-dependent model for the speciation of divalent Cu, Zn, Cd, and Pb ions in seawater was constructed with available and estimated thermodynamic stability constants and individual ion activity coefficients as mentioned in this paper.
Related Papers (5)
The complexation of metals with humic materials in natural waters
Prevention of contamination and other accuracy risks in voltammetric trace metal analysis of natural waters@@@Vermeidung von Kontamination und anderen die Richtigkeit beeinflussenden Einwirkungen bei der voltammetrischen Spurenanalyse in natrlichen Gewssern: Part III. Voltammetric ultratrace analysis with a multicell system designed for clean bench working@@@Teil III. Voltammetrische Ultraspurenanalyse mit einem Multizellensystem zum Einsatz unter einer clean bench
L. Mart,H. W. Nrnberg,P. Valenta +2 more