Equilibrium studies of metal-ion complexes of interest to natural waters — VII Mixed-ligand complexes of Cu(II) involving fulvic acid as primary ligand

Manning, P. G.; Ramamoorthy, S.

doi:10.1016/0022-1902(73)80248-9

Cited by 47 publications

(13 citation statements)

References 15 publications

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“…259 phthalate-type complexes with Al in acid soils (MANNING and RAMAMOORTHY 1973). RAMAMOORTHY and MANNING (1974a) used ionisation data for fulvic acid (GAMBLE 1970), in conjunction with pH titrations, to determine the equilibrium constants and proportions of the different complexes formed in a system containing aluminium, fulvic acid, citric acid and phosphate [1: 1: 1: 1 (3 mmol)].…”

Section: Aluminium In Solutionmentioning

confidence: 99%

Toxicity and Tolerance in the Responses of Plants to Metals

Woolhouse¹

1983

Physiological Plant Ecology III

300

195

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Section: Aluminium In Solutionmentioning

confidence: 99%

Toxicity and Tolerance in the Responses of Plants to Metals

Woolhouse¹

1983

Physiological Plant Ecology III

300

195

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“…The adsorption of copper by suspended particulates or colloids and complexation by other organic compounds was not included because these processes are more difficult to quantify. Adsorption and complexation by humic compounds can affect the speciation of copper significantly in natural waters and could compete for copper with algal-complexing agents (Riley 1939;Hutchinson 1957;Manning and Ramamoorthy 1973;Vuceta 1976).…”

Section: Discussionmentioning

confidence: 99%

Release of weak and strong copper‐complexing agents by algae1

McKnight

Morel

1979

Limnology & Oceanography

213

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“…Naturally occurring organic ligands, such as humic and fulvic acids, can form complexes and chelates with metals and thereby affect transport, availability, and toxicity of trace metals (Waris, 1953;Jenne, 1968;Zitko and others, 1973;Manning and Ramamoorthy, 1973;Beck and others 1974;Webber and Posselt, 1974;Elder, 1975;Whitfield and Lewis, 1976;Giesy and others, 1977a). Many kettle bog lakes in southwestern Maine have high concentrations of these refractory, colored organics, which can form soluble complexes with transition metals.…”

Section: Introductionmentioning

confidence: 96%

Metal binding capacity of selected maine surface waters

Giesy

Briese

Leversee

1978

Geo

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ABSTRACT/Concentrations of Ca, Cd, Cu, Fe, and Pb and binding capacities for Cd, Cu, and Pb were determined for water samples collected from 12 lakes in southwestern Maine using atomic absorption and ion-selective electrodes, respectively. Surface waters in this area are soft and characterized by low pH. Some lakes were highly colored with refractory organics, whereas others had very low organic carbon concentrations. Both Cu and Pb concentrations were positively correlated with organic carbon content. Copper and Pb binding capacities were significantly correlated with organic carbon content, whereas Cd binding capacity was positively correlated with pH, but not with organic carbon. Surface water binding capacity for Pb was greater than that for Cu or Cd. More than 99% of the Ca from all waters studied was removed onto cationic exchange resins. Less than 1% of the total Cu existed as cationic species in highly humic waters, whereas as much as 65% existed as cationic species in less humic waters. Conversely, more than 99% of the Cd present in humic waters existed as cationic species, whereas as little as 50% existed as cationic species in less humic, more alkaline waters. These correlative studies indicate that binding by organic carbon is important for both Cu and Pb in this area and must be considered in models of trace metal speciation. However, Cd binding in the same waters is not correlated with organic carbon, which does not need to be considered in speciation models for Cd.

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Equilibrium studies of metal-ion complexes of interest to natural waters — VII Mixed-ligand complexes of Cu(II) involving fulvic acid as primary ligand

Cited by 47 publications

References 15 publications

Toxicity and Tolerance in the Responses of Plants to Metals

Toxicity and Tolerance in the Responses of Plants to Metals

Release of weak and strong copper‐complexing agents by algae1

Metal binding capacity of selected maine surface waters

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