On-line voltammetric monitoring of dissolved Cu and Ni in the Gulf of Cadiz, south-west Spain

Geochemical processes in estuarine and coastal waters often occur on temporally and spatially small scales, resulting in variability of metal speciation and dissolved concentrations. Thus, surveys, which are aimed to improve our understanding of metal behaviour in such systems, benefit from high-res...

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Bibliographic Details
Published in:Analytica chimica acta 1998-12, Vol.377 (2), p.205-215
Main Authors: Braungardt, Charlotte, P. Achterberg, Eric, Nimmo, Malcolm
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemistry
Coastal waters
Dissolved Cu
Dissolved Ni
Electrochemical methods
Exact sciences and technology
In-situ analysis
Natural water pollution
Pollution
Seawaters, estuaries
Trace metal monitoring
Voltametry
Water treatment and pollution
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Summary:Geochemical processes in estuarine and coastal waters often occur on temporally and spatially small scales, resulting in variability of metal speciation and dissolved concentrations. Thus, surveys, which are aimed to improve our understanding of metal behaviour in such systems, benefit from high-resolution, interactive sampling campaigns. The present paper discusses a high-resolution approach to coastal monitoring, with the application of an automated voltammetric metal analyser for on-line measurements of dissolved trace metals in the Gulf of Cadiz, south-west Spain. This coastal sea receives metal-rich inputs from a metalliferous mining area, mainly via the Huelva estuary. On-line measurements of dissolved Cu, Zn, Ni and Co were carried out on-board ship during an eight-day sampling campaign in the study area in June 1997. A pumping system operated continuously underway and provided sampled water from a depth of ca. 4 m. Total dissolved metal concentrations measured on-line in the Gulf of Cadiz ranged between
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(98)00426-7