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Copper Complexation Capacity in Surface Waters of the Venice Lagoon
- Source :
- Marine Environmental Research, Marine Environmental Research, Elsevier science, 2008, 66 (4), pp.404. ⟨10.1016/j.marenvres.2008.06.003⟩
- Publication Year :
- 2008
- Publisher :
- HAL CCSD, 2008.
-
Abstract
- Total copper (Cu(T)), copper ion activity (pCu) and the copper complexation capacity (CuCC) were determined in samples of seawater collected in July 2003 from the Venice Lagoon. Cu(T) and CuCC showed considerable spatial variability: Cu(T) ranged from 1.8 to 70.0nM, whereas the CuCC varied from 195 to 573nM. pCu values varied from 11.6 to 12.6 and are consistent with those previously reported in estuarine and coastal areas (10.9-14.1). The range of Cu(T) values compares well with those reported in the past in the lagoon and in the adjacent Adriatic Sea. The highest concentrations of Cu(T) were found in samples collected near the industrial area of Porto Marghera, whereas the lowest were measured near the Chioggia and Malamocco inlets, where an intense tidally-driven renewal of seawater takes place. Although CuCC showed a high degree of spatial variability, the values recorded in the Venice Lagoon are comparable to those reported in other estuarine systems. In addition, CuCC was positively correlated with dissolved organic carbon (DOC), suggesting that organic ligands responsible for Cu complexation are part of the bulk organic matter pool in the lagoon. The CuCC:Cu(T) molar ratio was, on average 55:1, indicating that a large excess of complexation capacity exists in the Venice Lagoon. The high levels of CuCC and the narrow range of pCu indicates the importance of the role played by organic ligands in controlling the free ion Cu concentrations in the lagoon, and as a consequence, regulating its availability and/or toxicity.
- Subjects :
- Chlorophyll
Salinity
010504 meteorology & atmospheric sciences
chemistry.chemical_element
010501 environmental sciences
Aquatic Science
Oceanography
01 natural sciences
Dissolved organic carbon
Seawater
Organic matter
14. Life underwater
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
chemistry.chemical_classification
geography
geography.geographical_feature_category
Geography
Chemistry
Chlorophyll A
Industrial area
Life Sciences
Estuary
General Medicine
Inlet
Pollution
Copper
Carbon
6. Clean water
Italy
13. Climate action
Environmental chemistry
Spatial variability
Subjects
Details
- Language :
- English
- ISSN :
- 01411136 and 18790291
- Database :
- OpenAIRE
- Journal :
- Marine Environmental Research, Marine Environmental Research, Elsevier science, 2008, 66 (4), pp.404. ⟨10.1016/j.marenvres.2008.06.003⟩
- Accession number :
- edsair.doi.dedup.....693d77990b006e0bd6946fd1aec164e1
- Full Text :
- https://doi.org/10.1016/j.marenvres.2008.06.003⟩