Copper speciation, influencing

Hansen HK, Yianatos JB, Ottosen LM. (2005). Speciation and leachabiUty of copper in mine tailings from porphyry copper mining Influence of particle size. Chemosphere 60 1497-1503. 

Krznaric [799] studied the influence of surfactants (EDTA, NTA) on measurements of copper and cadmium in seawater by differential pulse ASV. Adsorption of surfactants onto the electrode surface were shown to change the kinetics of the overall electrode charge and mass transfer, resulting in altered detection limits. Possible implications for studies on metal speciation in polluted seawater with high surfactant contents are outlined. 

Petersen, R., 1982. Influence of copper and zinc on the growth of a freshwater alga, Scenedesmus quadricauda the significance of chemical speciation. Environ. Sci. Technol., 16 443-447. 

Similar demands for speciation of trace elements exist for food analysis. Substantial differences in the biological availability are known for several essential elements and depend on the form in which they are present in the diet. The chemical bases for these differences are known for cobalt, iron, and chromium but not for zinc, copper, and selenium. The importance of speciation in food analysis is best demonstrated by the example of iron. That element, when part of heme compounds, is well absorbed, and there is little influence on the absorption by other factors in the diet. Nonheme iron, on the other hand, is not readily absorbed and, in addition, is subject to many influences from dietary ingredients those influences are poorly understood and probably not completely known (14). 

Like iron complexes, copper complexes have been shown to be an important sink for photochemically-generated superoxide in seawater and, based on the high reactivity of Cu(ii) complexed by cyanobacterial-derived ligands, it is likely that redox reactions with superoxide significantly influence Cu redox speciation in the ocean [221,222]. These reactions also have important effects on the steady state concentrations of superoxide in seawater, reducing the concentration by at least an order of magnitude compared to previous estimates that ignored the reactions with copper complexes [222]. 

Baiasoiu CF, Zagury GJ and Deschenes L (2001) Partitioning and speciation of chromium, copper, and arsenic in CCA-contaminated soils influence of soil composition. Sci Total Environ 280 239-255. 

Cuzman, J Saucedo, I Revilla, J Navarro, R Cuibal, E. Copper sorption by chitosan in the presence of citrate ions Influence of metal speciation on sorption mechanism and uptake capacities. International Journal of Biological Macromolecules, 2003, 33, 57-65. 

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