Vertical transport processes of an acid-iron waste in a MERL stratified mesocosm
The vertical transport of the Fe particles formed after an acid-Fe waste mixes with seawater and the impact of the waste on the trace metal composition of seawater were examined in a stratified tank (2 m diameter and 5 m deep) at the MERL facility of the University of Rhode Island. Two acid-Fe waste additions were made to one of the stratified tanks at concentrations comparable to those observed after the initial dispersion of the waste in the ocean (10/sup 5/ dilution); a second stratified tank was maintained as a control. The removal of the Fe waste from the water column was due to settling of the Fe particles through the pycnocline; biological transport of the Fe particles was not an important removal mechanism. The kinetic behavior of the Fe particles was different after the two waste additions; gravitational settling was the rate-limiting step after the first addition, whereas flocculation was the rate-limiting step after the second waste addition. The first acid-Fe waste addition apparently altered the properties of the seawater, possibly stripping organic substances from the water column. This alteration in the characteristics of seawater changed the distribution of Pb and V between the dissolved and particulate forms. Both Pb and V showed a strong correlation with Fe, suggesting scavenging of these metals by the Fe particles. Cu and Cd show remarkable independence from the behavior of Fe. 18 references, 6 figures, 5 tables.
- Research Organization:
- Univ. of Rhode Island, Kingston
- OSTI ID:
- 6128244
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 20:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laboratory testing in-tank sludge washing, summary letter report
New Generation Dresden NPP Demineralizer Vault Cleanup Project
Related Subjects
54 ENVIRONMENTAL SCIENCES
CHEMICAL WASTES
ENVIRONMENTAL TRANSPORT
MARINE DISPOSAL
WATER CHEMISTRY
CADMIUM
COPPER
CORRELATIONS
IRON
LEAD
PARTICULATES
VANADIUM
CHEMISTRY
ELEMENTS
MANAGEMENT
MASS TRANSFER
METALS
PARTICLES
TRANSITION ELEMENTS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)