The Association of Copper With Dissolved Organic Matter in Seawater1

Williams, Peter M.

doi:10.4319/lo.1969.14.1.0156

Cited by 72 publications

(18 citation statements)

References 4 publications

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“…Thermodynamic calculations and recent experimental evidence indicate that inorganic metal complexes with Cl~, OH" and C03~ form major dissolved species of metals such as Ag, Au, Cd, Hg, In, U, V and Zn (Anonymous, 1956;Baric and Branica, 1967;Goldberg, 1963). An increasing amount of evidence indicates that significant fractions of the Zn, Fe and Cu in the oceans are present as soluble metal chelates (Barber and Ryther, 1969;Barber, et al, 1971;Corcoran and Alexander, 1964;Martin, et al, 1971;Rona, et al, 1962;Slowey and Hood, 1971; Steeman-Nielsen and Wium- Anderson, 1970;Torti,1969, Williams, 1969. However, no naturally -4-BNWL-SA-4048 occurring metal chelates have ever been isolated from seawater, and some investigators believe that the concentrations of natural chelating compounds present in the dissolved organic matter in the oceans are too low to permit extensive organic complexing of most trace metals (Duursma and Sevenhuysen, 1966;Duursma, 1970).…”

Section: Species In True Solutionmentioning

confidence: 99%

“…It has been estimated that by 1980 the U.S. alone will be producing 15,000 -20,000 kg of Pu each year (Andelman and Rozzell, 1970). Its uses as reactor fuels and power sources will increase the probability of environmental -1969(Miyake, et al, 1970. Plutonium-239 concentrations in ocean surface waters range from 0.11 -3.0 x 10"^^ Ci/kg (1.8 -48 x 10"^^g/kg) (see Table 1 ).…”

Section: Bnwl-sa-4085mentioning

confidence: 99%

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Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

Robertson¹

1971

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Section: Species In True Solutionmentioning

confidence: 99%

Section: Bnwl-sa-4085mentioning

confidence: 99%

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

Robertson¹

1971

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“…[37][38][39][40][41] The development of bioinorganic chemistry has revealed the presence of strong organic metal complexes in biological systems; 27,28 some metals (Fe, Cu, Zn, etc.) occupying the reactive center in enzymes, and highly stable complex, such as Fe(III) complexes of siderophores, 42 were also discovered.…”

Section: Organic Complexes Of Trace Metalsmentioning

confidence: 99%

Chemical Speciation of Trace Metals in Seawater: a Review

Hirose¹

2006

ANAL. SCI.

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The recent development of the chemical speciation of trace metals in seawater is described. The speciation studies reveal that metal ion complexation is one of the most important processes in seawater; especially, most bioactive trace metals, such as Fe(III) and Cu, exist as complexes with ligands in dissolved organic matter. The organic ligands in seawater are characterized with metal ions selected by the HSAB concept. A strong organic ligand, which originates from marine microorganisms, is classified as a hard base including carboxylates. The free organic ligand concentrations in seawater are buffered by complexation with excess amounts of Ca and Mg in seawater. The chemical equilibrium model suggested that the concentrations of bioactive free metal ions are at an optimal level to activities of marine microorganisms. For chemical speciation, it is important to have a better understanding of the ecological roles of trace metals in seawater.

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“…WILLIAMS, 1969;SPENCER and SACHS, 1970). TSUNOGAI et al (1974) stated that these insoluble metals do not form a true solution in seawater and that their transport from surface water to deep water in the pelagic ocean should be realized by organic or biogenic substances whether or not these metals are chemically as sociated with organic matter.…”

Section: Introductionmentioning

confidence: 99%

Particulate manganese, iron and aluminum in coastal water, Funka Bay, Japan.

Tsunogai

Uematsu

1978

Geochem. J.

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Seawater samples collected in a coastal area in Funka Bay, Hokkaido, were analyzed for manganese, iron and aluminum in particulate form and for the total concentrations of manganese and iron . A marked contrast was found in the seasonal variations of their distribution with high concentrations of particulate aluminum in winter and total manganese in summer. The causes of the seasonal variations are the dissolution of manganese from the sea floor and the influx of terrigenous material probably transported by the winter monsoon, although resuspension of particles from the bottom and in situ biological decomposition contribute somewhat to the variations in the lower layers of the bay water . When the particulate matter becomes incorporated into the bottom sediments , the proportions of metals lost from the particles are calculated to be more than 76% for manganese and 57% for iron . The rates of resupply to the coastal water estimated from the particulate flux are calculated to be 0.5 and lOg/m2/yr for manganese and iron, respectively .

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The Association of Copper With Dissolved Organic Matter in Seawater1

Cited by 72 publications

References 4 publications

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

Influence of the Physico-Chemical Forms of Radionuclides and Stable Trace Elements in Seawater in Relation to Uptake by the Marine Biosphere.

Chemical Speciation of Trace Metals in Seawater: a Review

Particulate manganese, iron and aluminum in coastal water, Funka Bay, Japan.

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