Selective leaching of tracemetals from sediments as a function of pH
Journal Article
·
· Anal. Chem.; (United States)
Trace metals were leached from sediments and suspended particulates by using phthalate buffers at pH values of 2.2-6. Cadmium, Cu, Fe, Mn, Pb, and Zn were determined in the resulting leachates by flame or flameless atomic absorption spectrometry. The fraction of total metal removed varied with sample composition, final pH, and element determined. Analytical precision for the leach was generally <8% relative standard deviation. The effects of equilibration time, aqueous/solid ratio, solution matrix, wet vs. dry sample, and final pH on the technique were evaluated. Depending on the element and sample type, metal removal increased linearly or exponentially with decreasing pH. Metal release rates were rapid with 35-85% of the leachable metal removed within 0.5 h of the 48 h experiment. This technique shows promise for studying biological availability and uptake/release processes for metals in sediment and soil as a function of pH.
- Research Organization:
- Florida Inst. of Tech., Melbourne
- OSTI ID:
- 6054549
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:4; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
400105 -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560306 -- Chemicals Metabolism & Toxicology-- Man-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION SPECTROSCOPY
CADMIUM
CHEMICAL ANALYSIS
COPPER
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON
LEACHING
LEAD
MANGANESE
METALS
NUMERICAL DATA
PARTICLES
PARTICULATES
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SEDIMENTS
SEPARATION PROCESSES
SPECTROSCOPY
TRANSITION ELEMENTS
ZINC
400104* -- Spectral Procedures-- (-1987)
400105 -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560306 -- Chemicals Metabolism & Toxicology-- Man-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION SPECTROSCOPY
CADMIUM
CHEMICAL ANALYSIS
COPPER
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON
LEACHING
LEAD
MANGANESE
METALS
NUMERICAL DATA
PARTICLES
PARTICULATES
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SEDIMENTS
SEPARATION PROCESSES
SPECTROSCOPY
TRANSITION ELEMENTS
ZINC