Title:
Erosion of Colloids Coated With Humic Substances in Fixed and Fluidized Beds
Erosion of Colloids Coated With Humic Substances in Fixed and Fluidized Beds
Author(s)
Mahmood, Talat
Amirtharajah, Appiah
Sturm, Terry W.
Dennett, Keith E.
Amirtharajah, Appiah
Sturm, Terry W.
Dennett, Keith E.
Advisor(s)
Editor(s)
Hatcher, Kathryn J.
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Abstract
Migration of various pollutants associated
with colloidal particles has been reported by several
researchers. Detachment of colloids and their associated
pollutants could be controlled by hydrodynamic as well
as chemical conditions of the eroding water. The
objective of this study is to understand the mechanisms
of detachment of uncoated colloids and colloids coated
with humic substances from relatively coarse media
grains. Under fixed-bed conditions, the percent
detachment was found to increase with an increase in
pore velocity. Increased organic coatings caused
percent detachment to decrease under fluidized bed
conditions. The results of this study will be useful for
modifications to soil erosion models for cohesive
sediments and estimation of transport of contaminants
carried by colloids during dredging operations.
Sponsor
Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, The University of Georgia, Georgia State University, Georgia Institute of Technology
Date Issued
1995-04
Extent
Resource Type
Text
Resource Subtype
Proceedings