Selenate and selenite mobility in overburden by saturated flow

Journal Article · · J. Environ. Qual.; (United States)

OSTI ID:6027036

Ahlrichs, J S; Hossner, L R

The elution and sorption characteristics of selenate and selenite were measured in column studies. A composite of sandy loam textured strip mine overburden was adjusted to pH 2, 3, 5, 7, and 9 and packed into glass columns. Selenium was added to the surface as the Na salt of selenate (SeO/sub 4//sup 2 -/) or selenite (SeO/sub 3//sup 2 -/). Individual columns were leached with 1.5, 10, or 50 pore volumes of 0.01 M CaCl/sub 2/. Selenate was mobile at all pH values and was completely leached from columns with <3 pore volumes of solution. Selenite was rapidly sorb ed at all pH values. Very slight selenite movement was observed when high pH overburden was leached with 50 pore volumes of solution. The least movement was recorded when pH values were <7.

• OSTI ID: 6027036
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 16:2; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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Lignite
&amp; Peat-- Surface Mining-- (1987-)
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54 ENVIRONMENTAL SCIENCES
BROWN COAL
CARBONACEOUS MATERIALS
COAL
DISSOLUTION
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
FOSSIL FUELS
FUELS
LEACHING
LIGNITE
MASS TRANSFER
MATERIALS
MINING
OXYGEN COMPOUNDS
PH VALUE
SELENATES
SELENITES
SELENIUM
SELENIUM COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SPOIL BANKS
SURFACE MINING