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Sorption of Thorium Onto Subsurface Geomedia
(2011-11-17)
Radionuclide contamination has been a significant environmental problem at US Department of Energy (USDOE) sites for many years. In addition, a final disposal solution for radioactive waste, such as deep geological ...
Characterization of the Behavior of High Volume Fly Ash Concrete
(2011-08-11)
Fly ash is commonly used as a supplementary cementitious material (SCM) in the production of portland cement concrete. Concrete produced with high fly ash replacement levels is considered high volume fly ash (HVFA) concrete. ...
Development of Guidance for Runoff Coefficient Selection and Modified Rational Unit Hydrograph Method for Hydrologic Design
(2012-05-07)
The rational method is the most widely used method by hydraulic and drainage engineers to estimate design discharges. The runoff coefficient (C) is a key parameter for the rational method. Literature-based C values (Clit) ...
Characterization of Multi-Phase Performance-Based Passive Control Systems
(2011-10-27)
Typical passive control devices have inherent strengths and weaknesses as seismic protection systems. A Multi-phase Passive Control System (MPCS) combines two types of passive control devices in a system in order to offset ...
Identification of Factors Contributing to Geographic Scale and Mode Choice of Long-Distance Travel
(2014-07-11)
As long-distance travel increases it is emerging as an increasingly important consideration in transportation planning. Not only is this in response to an increase in magnitude but also in recognition that such trips possess ...
Immobilization of Mercury by Stabilized FeS Nanoparticles and Effects of Oil Dispersant on Sorption/Desorption and Photodegradation of Polycyclic Aromatic Hydrocarbons
(2014-04-25)
Iron sulfide (FeS) nanoparticles were prepared with sodium carboxymethyl cellulose (CMC) as a stabilizer, and tested for enhanced removal of mercury (Hg(II)) from water, soil and sediment. The presence of CMC at ≥0.03 wt.% ...
Understanding Unsteady Flow and Modeling Water Quality Dynamics in the Coastal Systems under Various Hydrological and Climate Scenarios
(2014-05-12)
Three dimensional hydrodynamic Environmental Fluid Dynamics Code (EFDC) model was used to simulate flow, temperature, dye, age of tracer, and salinity in the Alabama coastal systems. The study area Perdido Bay and Wolf Bay ...
Sorption and Biodegradation of Pharmaceutical Compounds in Biological Wastewater Treatment Process
(2009-02-23)
This study was performed to investigate the removal mechanisms of pharmaceutical compounds (PhACs) in biological treatment processes. The removal efficiencies and byproducts of three model compounds including 17a-ethinylestradiol ...
Compressive Strength and Modulus of Elasticity Relationships for Alabama Prestressed Concrete Bridge Girders
(2014-07-09)
The state of Alabama constructs many of its bridges using precast, prestressed concrete bridge girders. There is a desire to more accurately predict girder cambers through the time of deck placement. Proper understanding ...
An Evaluation of the Use of Self-Consolidating Concrete (SCC) for Drilled Shaft Applications
(2009-02-23)
In drilled shaft construction, the recent development of sophisticated techniques for integrity and load testing has lead to the ability to assess the quality of drilled shaft foundations in terms of integrity and load ...