Complexing Capacity of Natural Water--Its Significance and Measurement

Chau, Y. K.

doi:10.1093/chromsci/11.11.579

Cited by 31 publications

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“…In seawater, copper and other heavy metals are often bound in chemical complexes by various naturally occurring organic and inorganic ligands (Siegal 1971;Chan 1973). These ligands operate as nature's analogues of synthetic chelators such as ethylenediaminetetraacetic acid, EDTA (Barber 1974).…”

Section: Limnolmentioning

confidence: 99%

A bacterial bioassay for measuring the copper‐chelation capacity of seawater 1

Gillespie

Vaccaro

1978

Limnology & Oceanography

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A relatively simple 14C tracer bioassay technique is described which uses a copper sensitive bacterium to measure the copper chelation capacity of seawater. Known increments of ethylenediaminetetraacetic acid are used to evaluate decreased bacterial inhibition accompanying reduced cupric ion activity. Ultraviolet irradiation and selective filtration of natural seawaters indicate that organic assemblages having molecular weights <10,000 are principally responsible for copper chelation. Copper chelation capacities ranged from 3 µg·liter−1 of copper for oligotrophic to 40 µg liter−1 of copper for eutrophic marine waters.

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Section: Limnolmentioning

confidence: 99%

A bacterial bioassay for measuring the copper‐chelation capacity of seawater 1

Gillespie

Vaccaro

1978

Limnology & Oceanography

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“…The role of organic matter which forms soluble complexes with trace metal ions in aquatic environments has been the subject of speculation and experiment for several years (1)(2)(3)(4)(5)(6)(7)(8)(9). One of the parameters frequently measured by workers studying metal ion/organic matter interactions is complexing capacity which is usually defined as the moles of metal ion which are complexed per liter of sample.…”

mentioning

confidence: 99%

Determination of the complexing capacity of natural water by cobalt(III) complexation

Hanck¹,

Dillard²

1977

Anal. Chem.

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“…A reduction in the abundance of complexing ligands in a body of water would regulate the availability of trace metals (Chau, 1973) such as iron. Laboratory experiments on iron and CaCO_ interaction showed chelator compounds do influence the precipitation rate of both iron and CaC0 3 (Table 4).…”

Section: A Sedimentation Of Seston Componentsmentioning

confidence: 99%

Role of calcium carbonate precipitation in lake metabolism

White

1974

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During a two year period analyses were made every other week on seston collected at three depths in a small hard-water lake in southwestern Michigan. The seston was analyzed for total dry weight, organic material, calcium carbonate, and ash content. During the second year seasonal changes in sestonic particulate organic carbon, Kjeldahl nitrogen, and total phosphorus were assayed.Organic material and ash content of the seston was similar both years, but the calcium carbonate content was five times greater in the second year than in the first. The dissimilarity in calcium carbonate precipitation between the two years was related to degree of vernal circulation and calcium ion concentration in the water column when the ice broke up. During the study an improved sediment trap was designed and constructed. The trap had replicated, discrete upper and lower sections, which permitted correction for attached and non-sedimenting matter.Investigation of calcium ion concentration by flame atomic absorption and a calcium ion electrode revealed an average of 36.7 mg l" 1 of colloidal calcium was suspended in the lake during 1973.Immumz a. w: VMS DOCUMENT !S OPOraiTEB Dr. Ellis willingly gave constructive advice and help in the x-ray diffraction analyses, thermal analysis, surface area determinations, and calcium electrode determinations.

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Complexing Capacity of Natural Water--Its Significance and Measurement

Cited by 31 publications

References 0 publications

A bacterial bioassay for measuring the copper‐chelation capacity of seawater 1

A bacterial bioassay for measuring the copper‐chelation capacity of seawater 1

Determination of the complexing capacity of natural water by cobalt(III) complexation

Role of calcium carbonate precipitation in lake metabolism

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