Adsorption as a control of metal concentrations in sediment extracts
- Australian Atomic Energy Commission Research Establishment, Lucas Heights
The adsorption of Cu, Pb, and Cd from selected extractant solutions, onto uncontaminated river sediments, has been investigated under typical extraction conditions. Significant adsorption of added metal was found to occur during overnight extraction with dilute HCl (pH>1.5), 0.1 M hydroxylamine hydrochloride (pH 2), 0.1 M sodium citrate (pH 4.6), 1 M ammonium acetate, 10% sodium citrate-1% sodium dithionite, and 25% acetic acid. Adsorption also occurred during a hydrogen peroxide digestion procedure. The inability of reagents to prevent losses of soluble metal in these experiments strongly suggests that a proportion of the metal actually released from a sediment sample during an extraction will be readsorbed. This may lead to serious misinterpretation of extraction data because the metal concentrations determined in the extract do not represent metal levels in the sediment fractions attacked.
- OSTI ID:
- 5766037
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 14
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
MEASURING METHODS
CADMIUM
ENVIRONMENTAL TRANSPORT
COPPER
LEAD
ECOLOGICAL CONCENTRATION
EXTRACTION
INTERFERING ELEMENTS
SEDIMENTS
ELEMENTS
MASS TRANSFER
METALS
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENTS
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)