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

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	On-line voltammetric monitoring of dissolved Cu and Ni in the Gulf of Cadiz, south-west Spain
	Charlotte Braungardt ; Eric P. Achterberg* and Malcolm Nimmo
发表期刊	Analytica Chimica Acta
ISSN	0003-2670
	1998
卷号	377 页码:205-215
关键词	Trace Metal Monitoring Voltametry Dissolved Cu Dissolved Ni In-situ Analysis Coastal Waters
英文摘要	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 <5 nM Cu (<3 nM Ni) ca. 50 km off-shore and 60–90 nM Cu (5–13 nM Ni) in the vicinity of the Huelva estuary. The survey revealed steep gradients and strong tidal variability in the dissolved metal plume extending from the Huelva estuary into the Gulf of Cadiz. Further on-line measurements were carried out with the automatic metal monitor from the bank of the Odiel estuary over a full tidal cycle, at dissolved metal concentrations in the μM range. The application confirmed the suitability of the automated metal monitor for coastal sampling, and demonstrated its adaptability to a wide range of environmental conditions in the dynamic waters of estuaries and coastal seas. The near-real time acquisition of dissolved metal concentrations at high resolution enabled an interactive sampling campaign and therefore the close investigation of tidal variability in the development of the Huelva estuary metal plume.
语种	英语
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/3059
专题	科研共享资源
推荐引用方式 GB/T 7714	Charlotte Braungardt,Eric P. Achterberg* and Malcolm Nimmo. On-line voltammetric monitoring of dissolved Cu and Ni in the Gulf of Cadiz, south-west Spain[J]. Analytica Chimica Acta,1998,377:205-215.
APA	Charlotte Braungardt,&Eric P. Achterberg* and Malcolm Nimmo.(1998).On-line voltammetric monitoring of dissolved Cu and Ni in the Gulf of Cadiz, south-west Spain.Analytica Chimica Acta,377,205-215.
MLA	Charlotte Braungardt,et al."On-line voltammetric monitoring of dissolved Cu and Ni in the Gulf of Cadiz, south-west Spain".Analytica Chimica Acta 377(1998):205-215.

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