Adsorption as a control of metal concentrations in sediment extracts

Journal Article · Sat Mar 01 04:00:00 EST 1980 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es60163a002· OSTI ID:5766037

Rendell, P S ^[1]; Batley, G E; Cameron, A J

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1. 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), Journal Name: Environ. Sci. Technol.; (United States) Vol. 14; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
CADMIUM
COPPER
ECOLOGICAL CONCENTRATION
ELEMENTS
ENVIRONMENTAL TRANSPORT
EXTRACTION
INTERFERING ELEMENTS
LEAD
MASS TRANSFER
MEASURING METHODS
METALS
SEDIMENTS
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENTS