Analysis of cobalt(II) EDTA and cobalt(III) EDTA in pore water by ion chromatography

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Journal of Environmental Quality

DOI:https://doi.org/10.2134/jeq1995.00472425002400040035x· OSTI ID:369900

Taylor, D L; Jardine, P M ^[1]

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1. Oak Ridge National Lab., TN (United States)

Monitoring and restoration activities at contaminated waste facilities throughout the USA have identified complicated mixtures of organic and inorganic contaminants in soil and groundwater. Inorganic contaminants are sometimes associated with various chelating agents (termed co-contaminants), which alter the geochemical behavior of the contaminants in subsurface environments. Until recently, the significance of the chelating agents (termed co-contaminants), which alter the geochemical behavior of the contaminants in subsurface environments. Until recently, the significance of the chelating agents was usually dismissed, and they were not routinely measured as part of environmental compliance programs. A method is presented for separating and quantifying the common subsurface co-contaminant species of CoEDTA in aqueous solution. Cobalt(II)EDTA and Co(III)EDTA are separated by an ion chromatograph using a carbonate, bicarbonate eluant, and quantified in the presence of common pore-water inorganic anions using electrical conductivity and visible light detectors. The chromatograph detects Co(II)-EDTA to 0.6 {mu}mol L{sup -1} with a linear range >4000 {mu}mol L{sup -1}. Cobalt-(III)EDTA is detected to 1.8 {mu}mol L{sup -1} with a linear range > 860 {mu}mol L{sup -1}. The method has application in basic scientific research and environmental restoration activities. 23 refs., 2 figs., 2 tabs.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 369900
• Journal Information: Journal of Environmental Quality, Journal Name: Journal of Environmental Quality Journal Issue: 4 Vol. 24; ISSN JEVQAA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
COBALT 60
COBALT COMPLEXES
EDTA
GROUND WATER
ION EXCHANGE CHROMATOGRAPHY
QUANTITATIVE CHEMICAL ANALYSIS
REMEDIAL ACTION