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Dissolved organic carbon reduces uranium bioavailability and toxicity. 1. Characterization of an aquatic fulvic acid and its complexation with uranium[VI].
Environ Sci Technol. 2011 Apr 01; 45(7):3075-81.ES

Abstract

Fulvic acid (FA) from a tropical Australian billabong (lagoon) was isolated with XAD-8 resin and characterized using size exclusion chromatography, solid state cross-polarization magic angle spinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, and potentiometric acid-base titration. Physicochemical characteristics of the billabong FA were comparable with those of the Suwannee River Fulvic Acid (SRFA) standard. The greater negative charge density of the billabong FA suggested it contained protons that were more weakly bound than those of SRFA, with the potential for billabong water to complex less metal contaminants, such as uranium (U). This may subsequently influence the toxicity of metal contaminants to resident freshwater organisms. The complexation of U with dissolved organic carbon (DOC) (10 mg L(-1)) in billabong water was calculated using the HARPHRQ geochemical speciation model and also measured using flow field-flow fractionation combined with inductively coupled plasma mass-spectroscopy. Agreement between both methods was very good (within 4% as U-DOC). The results suggest that in billabong water at pH 6.0, containing an average DOC of 10 mg L(-1) and a U concentration of 90 μg L(-1), around 10% of U is complexed with DOC.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Trenfield MA
Ecotoxicology Program, Environmental Research Institute of the Supervising Scientist, GPO Box 461, Darwin, NT 0801, Australia. Melanie.Trenfield@environment.gov.au
McDonald S
No affiliation info available
Kovacs K
No affiliation info available
Lesher EK
No affiliation info available
Pringle JM
No affiliation info available
Markich SJ
No affiliation info available
Ng JC
No affiliation info available
Noller B
No affiliation info available
Brown PL
No affiliation info available
van Dam RA
No affiliation info available

MeSH

Aquatic OrganismsBenzopyransCarbonFresh WaterHydrogen-Ion ConcentrationKineticsModels, ChemicalMolecular WeightUraniumWater Pollutants, Radioactive

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21351802

Citation

Trenfield, Melanie A., et al. "Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an Aquatic Fulvic Acid and Its Complexation With Uranium[VI]." Environmental Science & Technology, vol. 45, no. 7, 2011, pp. 3075-81.
Trenfield MA, McDonald S, Kovacs K, et al. Dissolved organic carbon reduces uranium bioavailability and toxicity. 1. Characterization of an aquatic fulvic acid and its complexation with uranium[VI]. Environ Sci Technol. 2011;45(7):3075-81.
Trenfield, M. A., McDonald, S., Kovacs, K., Lesher, E. K., Pringle, J. M., Markich, S. J., Ng, J. C., Noller, B., Brown, P. L., & van Dam, R. A. (2011). Dissolved organic carbon reduces uranium bioavailability and toxicity. 1. Characterization of an aquatic fulvic acid and its complexation with uranium[VI]. Environmental Science & Technology, 45(7), 3075-81. https://doi.org/10.1021/es103330w
Trenfield MA, et al. Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an Aquatic Fulvic Acid and Its Complexation With Uranium[VI]. Environ Sci Technol. 2011 Apr 1;45(7):3075-81. PubMed PMID: 21351802.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dissolved organic carbon reduces uranium bioavailability and toxicity. 1. Characterization of an aquatic fulvic acid and its complexation with uranium[VI]. AU - Trenfield,Melanie A, AU - McDonald,Suzanne, AU - Kovacs,Krisztina, AU - Lesher,Emily K, AU - Pringle,Jennifer M, AU - Markich,Scott J, AU - Ng,Jack C, AU - Noller,Barry, AU - Brown,Paul L, AU - van Dam,Rick A, Y1 - 2011/02/25/ PY - 2011/3/1/entrez PY - 2011/3/1/pubmed PY - 2011/6/15/medline SP - 3075 EP - 81 JF - Environmental science & technology JO - Environ Sci Technol VL - 45 IS - 7 N2 - Fulvic acid (FA) from a tropical Australian billabong (lagoon) was isolated with XAD-8 resin and characterized using size exclusion chromatography, solid state cross-polarization magic angle spinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, and potentiometric acid-base titration. Physicochemical characteristics of the billabong FA were comparable with those of the Suwannee River Fulvic Acid (SRFA) standard. The greater negative charge density of the billabong FA suggested it contained protons that were more weakly bound than those of SRFA, with the potential for billabong water to complex less metal contaminants, such as uranium (U). This may subsequently influence the toxicity of metal contaminants to resident freshwater organisms. The complexation of U with dissolved organic carbon (DOC) (10 mg L(-1)) in billabong water was calculated using the HARPHRQ geochemical speciation model and also measured using flow field-flow fractionation combined with inductively coupled plasma mass-spectroscopy. Agreement between both methods was very good (within 4% as U-DOC). The results suggest that in billabong water at pH 6.0, containing an average DOC of 10 mg L(-1) and a U concentration of 90 μg L(-1), around 10% of U is complexed with DOC. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/21351802/Dissolved_organic_carbon_reduces_uranium_bioavailability_and_toxicity__1__Characterization_of_an_aquatic_fulvic_acid_and_its_complexation_with_uranium[VI]_ L2 - https://doi.org/10.1021/es103330w DB - PRIME DP - Unbound Medicine ER -