Binding of uranyl by humic acid

Shanbhag, P.M.; Choppin, Gregory R.

doi:10.1016/0022-1902(81)80117-0

Cited by 104 publications

(54 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mobile forms in groundwater are transported as divalent uranyl (UO 2 2+ ) ions or hexavalent carbonate complexes in the presence of high concentrations of CO 2 [6]. They are also adsorbed by colloidal humic-fulvic acids and other low-molecular-weight complexing agents such as hydroxides and carbonates naturally found in groundwater [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Rhizofiltration using sunflower (Helianthus annuus L.) and bean (Phaseolus vulgaris L. var. vulgaris) to remediate uranium contaminated groundwater

Lee

Yang

2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Rhizofiltration using sunflower (Helianthus annuus L.) and bean (Phaseolus vulgaris L. var. vulgaris) to remediate uranium contaminated groundwater

Lee

Yang

2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Uranium(VI) adsorbs onto a variety of minerals and related phases, including clays (e.g., Ames et al 1982;Chisholm-Brause et al 1994), oxides and silicates (e.g., Hsi and Langmuir 1985;Waite et al 1994), and natural organic material (e.g., Borovec et al 1979;Shanbhag and Choppin 1981;Read et al 1993). Important environmental parameters affecting U migration include oxidation/reduction conditions, pH, concentrations of complexing ligands such as dissolved carbonate, ionic strength, and mineralogy.…”

Section: General Adsorption Behaviormentioning

confidence: 99%

Advances in Geochemical Testing of Key Contaminants in Residual Hanford Tank Waste

Deutsch¹,

Krupka²,

Cantrell³

et al. 2005

View full text Add to dashboard Cite

This document was printed on recycled paper.The cover shows a scanning electron microscope image of aluminum (red) and iron (green) in a particle aggregate of residual waste from tank C-106 at the C Tank Farm on the Hanford Site. Cover design by S. B. Neely, Pacific Northwest National Laboratory. SummaryThis report describes the advances that have been made over the past two years in testing and characterizing waste material in Hanford tanks. This waste is being studied because it will remain in the tanks after closure and represents a potential source of contamination to the environment. The development of a contaminant release model for the residual waste in a tank requires detailed knowledge of the composition of the waste and the phases (liquid and solids) in the waste that contain the contaminant. The contaminant release models developed for the tanks will be used as a component in the performance assessments for tank closures being conducted by CH2M HILL Hanford Group Inc. for the U.S. Department of Energy.

show abstract

“…In natural waters, including seawater at pH 8 with carbonate ion at 10' 5 M, the uranyl ion exists entirely as the carbonate complexes and humate cannot compete with carbonate as a complexor of uranyl ion (18). In natural waters of lower pH, as are present in Magela Creek (pH<6.5), the above may not be the case.…”

Section: Relationship Of Uranium and Humic Mattermentioning

confidence: 96%

“…Several studies have shown that adsorption of uranyl ion on organic matter, including humic acids and particularly in the pH range 4-5, is an important transfer mode of uranium (16)(17)(18)(19). Uranyl ion showed greater selectivity of fixation with organic matter for a pH range 2-4 than all the other heavy metal ions examined, including cupric ion (16).…”

Section: Relationship Of Uranium and Humic Mattermentioning

confidence: 99%

Uranium in sediments from the Magela Creek catchment, northern territory, Australia

Noller¹,

Hart

1993

Environmental Technology

View full text Add to dashboard Cite

The 'fine silt and clay' fraction of sediments from various tropical billabongs (permanent waterbodies) in the Magela Creek catchment, Northern Australia, were analysed for uranium by delayed neutron activation analysis. Sediment samples were from a range of billabong types: backflow (4 samples), channel (2 samples) and floodplain (5 samples) and were sampled and prepared for analysis as described by Thomas and Hart (1). Uranium concentration data from this study are compared with previously reported uranium concentrations and organic carbon concentration in Magela Creek sediments. Uranium concentration tends to be higher in 'fine silt and clay' fractions of sediments (<20 m; mean 6.1 μg g -1 uranium) compared with that in the total sediment (mean 2.7 μg g -1 uranium). It is also higher in backflow billabongs (mean 7 μg g -1 uranium) and floodplain sediments (mean 3.0 μg g -1 uranium) compared with creek/channel sediments (mean 2.5 μg g -1 ). Low uranium concentration in sediment was correlated with low organic carbon concentration. The transfer of uranium in sediments from upstream billabongs to the floodplain probably takes place over one wet season, since there is little evidence of storage of uranium in the sandy sediments that predominate in the creek channel.

show abstract

Binding of uranyl by humic acid

Cited by 104 publications

References 9 publications

Rhizofiltration using sunflower (Helianthus annuus L.) and bean (Phaseolus vulgaris L. var. vulgaris) to remediate uranium contaminated groundwater

Rhizofiltration using sunflower (Helianthus annuus L.) and bean (Phaseolus vulgaris L. var. vulgaris) to remediate uranium contaminated groundwater

Advances in Geochemical Testing of Key Contaminants in Residual Hanford Tank Waste

Uranium in sediments from the Magela Creek catchment, northern territory, Australia

Contact Info

Product

Resources

About