Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI]
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 pinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, and potentiometric acid-base fitrat...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/42207 |
| _version_ | 1848756356629135360 |
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| author | Trenfield, M. McDonald, Suzanne Kovacs, K. Lesher, E. Pringle, J. Markich, S. Ng, J. Noller, B. Brown, P. Van Dam, R. |
| author_facet | Trenfield, M. McDonald, Suzanne Kovacs, K. Lesher, E. Pringle, J. Markich, S. Ng, J. Noller, B. Brown, P. Van Dam, R. |
| author_sort | Trenfield, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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 pinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, and potentiometric acid-base fitration. 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 HARPHRQgeochemical 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 g L-1, around 10% of U is complexed with DOC. |
| first_indexed | 2025-11-14T09:10:54Z |
| format | Journal Article |
| id | curtin-20.500.11937-42207 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:10:54Z |
| publishDate | 2011 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-422072017-09-13T15:58:10Z Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] Trenfield, M. McDonald, Suzanne Kovacs, K. Lesher, E. Pringle, J. Markich, S. Ng, J. Noller, B. Brown, P. Van Dam, R. size exclusion chromatography Fulvic acid tropical Australian billabong 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 pinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, and potentiometric acid-base fitration. 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 HARPHRQgeochemical 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 g L-1, around 10% of U is complexed with DOC. 2011 Journal Article http://hdl.handle.net/20.500.11937/42207 10.1021/es103330w American Chemical Society restricted |
| spellingShingle | size exclusion chromatography Fulvic acid tropical Australian billabong Trenfield, M. McDonald, Suzanne Kovacs, K. Lesher, E. Pringle, J. Markich, S. Ng, J. Noller, B. Brown, P. Van Dam, R. Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title | Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title_full | Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title_fullStr | Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title_full_unstemmed | Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title_short | Dissolved Organic Carbon Reduces Uranium Bioavailability and Toxicity. 1. Characterization of an quatic Fulvic Acid and Its Complexation with Uranium[VI] |
| title_sort | dissolved organic carbon reduces uranium bioavailability and toxicity. 1. characterization of an quatic fulvic acid and its complexation with uranium[vi] |
| topic | size exclusion chromatography Fulvic acid tropical Australian billabong |
| url | http://hdl.handle.net/20.500.11937/42207 |