Speciation of EDTA in Natural Waters: Exchange Kinetics of Fe-EDTA in River Water

Xue, Hanbin; Sigg, Laura; Kari, Franz Günter

doi:10.1021/es00001a007

Cited by 152 publications

(91 citation statements)

References 9 publications

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“…Consequently, nonlabile EDTA, which for these effluents was a significant proportion of total EDTA, might be considered unlikely to dissociate and complex with the added Cu within the time frame of the toxicity assays. Indeed, the slow rate of dissociation of nonlabile EDTA has been noted in other studies that demonstrated that the dissociation of this complex may occur over many days [44]. Because the present study's speciation calculations suggest that, at the optimized active DOC concentration, most EDTA adsorption sites would be occupied by Cu, the effect of EDTA may have been overstated.…”

Section: Significance Of D Magna Genotypementioning

confidence: 46%

An evaluation of biotic ligand models predicting acute copper toxicity to Daphnia magna in wastewater effluent

Constantino

Scrimshaw

Comber

et al. 2011

Enviro Toxic and Chemistry

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were capable of predicting toxicity by within a factor of two, and that the modified BLM produced 17 the most accurate toxicity forecasts. However, this was generally dependent on the inclusion of 18 effluent specific water chemistry characteristics in the speciation modelling as well as optimising 19 the dissolved organic carbon 'active' fraction. Only the refined D. magna BLM predicted all 20 EC50 values by within a factor of two using default model parameters and standard model 21 inputs. The results also suggested that the biotic ligand stability constant for sodium may be a 22 poor approximation of the mechanisms governing the influence of sodium where concentrations 23 exceed the range within which the biotic ligand stability constant value had been determined. 24These findings support the use of BLMs for the establishment of site-specific water quality 25 standards in waters that contain a substantial amount of wastewater effluent, but re-enforces 26 the need for regulators to scrutinize the composition of models, their thermodynamic and biotic 27 ligand parameters, and the limitations of those parameters. 28 29

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Section: Significance Of D Magna Genotypementioning

confidence: 46%

An evaluation of biotic ligand models predicting acute copper toxicity to Daphnia magna in wastewater effluent

Constantino

Scrimshaw

Comber

et al. 2011

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…Because of wide spread usage, high water solubility and slow biodegradation rate, EDTA has been detected in various water sources, including waste water treatment plant effluents and river waters in both the USA and Europe (Alder et al 1990). Concentrations of EDT A measured in river water typically range from 0.01 to 0.1 µM, similar to the concentration of several metal ions (Xue et al, 1995 Chitin and chitosan have been explored for wastewater treatment, such as removal of toxic metals and radionuclides, recovery of precious metals, and recycling of metals from industrial wastewater for reuse and to reduce operational costs (Rorrer and Hsien, 1993;Coughlin, 1990).…”

Section: Figure 49mentioning

confidence: 99%

Use of chitosan for the removal of metal ion contaminants and proteins from water

2007

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“…The chelating effects of EDTA for metals are well known, and many researchers have documented the chemistry of iron-EDTA complexes (3,7,13).…”

mentioning

confidence: 99%

Evaluation of Immunomagnetic Separation for Recovery of Cryptosporidium parvum and Giardia duodenalis from High-Iron Matrices

Yakub

Stadterman-Knauer

2000

Appl Environ Microbiol

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In this study we examined the recovery of Cryptosporidium parvum and Giardia duodenalis from matrices containing various concentrations of dissolved iron. The organisms were recovered by using the immunomagnetic separation-immunofluorescent assay method, and the levels of recovery were compared to the dissolved iron concentrations. The levels of recovery of C. parvum decreased sharply at dissolved iron concentrations greater than 4 mg/liter, while the levels of recovery of G. duodenalis decreased sharply at concentrations greater than 40 mg/liter.

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Speciation of EDTA in Natural Waters: Exchange Kinetics of Fe-EDTA in River Water

Cited by 152 publications

References 9 publications

An evaluation of biotic ligand models predicting acute copper toxicity to Daphnia magna in wastewater effluent

An evaluation of biotic ligand models predicting acute copper toxicity to Daphnia magna in wastewater effluent

Use of chitosan for the removal of metal ion contaminants and proteins from water

Evaluation of Immunomagnetic Separation for Recovery of Cryptosporidium parvum and Giardia duodenalis from High-Iron Matrices

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