Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management: Recent submissions
Now showing items 361-380 of 519
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Potential and Limitations of Applying HELP Model for Surface Covers
(American Society of Civil Engineers, 2002)Simulation models can be efficient tools, provided they are sufficiently validated. In the United States, the HELP model was developed to simulate the water balance of landfills, especially of liner systems. HELP version ... -
Natural Attenuation of Polycyclic Aromatic Hydrocarbon-Contaminated Sites: Review
(American Society of Civil Engineers, 2002)Natural attenuation is currently being applied as a remedial technology at many petroleum hydrocarbon and chlorinated compound contaminated sites. Although information on the use of natural attenuation at these sites is ... -
Natural Attenuation: How Is Mother Nature Aiding Us to Cleanse Our Environmental Sins?
(American Society of Civil Engineers, 2002) -
Multimedia Environmental Models
(American Society of Civil Engineers, 2002)In this introductory paper it is suggested that multimedia mass balance models can play a valuable role in improving our understanding of the behavior of chemicals in the environment. They can provide a rational basis for ... -
Review of Natural Attenuation of BTEX and MTBE in Groundwater
(American Society of Civil Engineers, 2002)Monitored natural attenuation has become accepted as an appropriate “technology” for treating petroleum hydrocarbon-contaminated groundwater. Commonly, the monoaromatic compounds benzene, toluene, ethylbenzene, and xylenes ... -
Development of Probabilistic Multimedia Multipathway Computer Codes
(American Society of Civil Engineers, 2002)The deterministic multimedia dose/risk assessment codes RESRAD and RESRAD-BUILD have been widely used for many years for evaluation of sites contaminated with residual radioactive materials. The RESRAD code applies to the ... -
Dose Assessment Associated with Landspreading of Petroleum-Industry Naturally Occuring Radioactive Material
(American Society of Civil Engineers, 2002)As a result of oil and gas production and processing operations, naturally occurring radioactive material (NORM) sometimes accumulates at elevated concentrations in byproduct waste streams. The primary radionuclide of ... -
Transport of Cr(VI) in Soils Contaminated with Chromite Ore Processing Residue (COPR)
(American Society of Civil Engineers, 2002)Chromium leaching experiments were conducted using soils rich in chromite ore processing residue (COPR). Experiments were performed with acrylic columns under a constant hydraulic head and a free board. Air was purged ... -
Transport of Subsurface Chemicals under Nonequilibrium Sorption Conditions
(American Society of Civil Engineers, 2002)An increasing weight of evidence has indicated that under certain conditions chemicals above background levels in soils may not be easily released and thus may not have an adverse environmental effect. This has led to a ... -
Radioactive Nuclear Waste
(American Society of Civil Engineers, 2002)Radioactive nuclear waste includes a large number of radioactive elements. Behavior of these elements is unstable and unpredictable because the elements can change form and properties during their decay process. In order ... -
An Analytical Primer on Environmental Multimedia Transport Modeling
(American Society of Civil Engineers, 2002) -
Evaluation of Application of One-dimensional Groundwater Transport Model to PRESTO-EPA Model
(American Society of Civil Engineers, 2002)This work evaluates the merits and the magnitude of potential errors expected from Hung’s one-dimensional groundwater transport model as integrated into EPA’s Prediction of Radiological Effects due to Shallow Trench Operation ... -
Multimedia Chemical Fate Model for Environmental Dredging
(American Society of Civil Engineers, 2002)Dredging the bed-sediment of rivers, lakes, estuaries, and harbors is a process of remediating contaminated sites. Whether used alone or in conjunction with in situ capping or natural recovery, its application results in ... -
Application of RESRAD-OFFSITE to Two Probabilistic Test Scenarios
(American Society of Civil Engineers, 2002)The use of probabilistic dose and risk analysis will become widespread in radiological assessments because of the insights it provides and because of the availability of fast personal computers. Although the probabilistic ... -
REVIEWERS OF THE <b><i>Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management</i></b>
(American Society of Civil Engineers, 2001) -
Semianalytical Simulation of Soil Vapor Extraction
(American Society of Civil Engineers, 2002)Soil vapor extraction (SVE) is a proven effective in situ technology for the removal of volatile organic compounds (VOCs) from the subsurface. However, most systems designed to date are based on empirical methods, ... -
Probabilistic Approach to Identify Sensitive Parameter Distributions in Multimedia Pathway Analysis
(American Society of Civil Engineers, 2002)Sensitive parameter distributions were identified with the use of probabilistic analysis in the RESRAD computer code. RESRAD is a multimedia pathway analysis code designed to evaluate radiological exposures resulting from ... -
Announcement
(American Society of Civil Engineers, 2002) -
Numerical Model for Biological Oxidation and Migration of Methane in Soils
(American Society of Civil Engineers, 2001)Concern over the potentially negative impacts of climate change has resulted in a search for techniques to reduce anthropogenic emissions of methane, a primary greenhouse gas. Microbial oxidation of methane in soils may ... -
Chromium(III) Isolation from Acid Extract of Tannery Sludge
(American Society of Civil Engineers, 2001)High concentrations of Al, Fe, Ca, Mg, and Zn in the tanning agent are detrimental to the properties of tanned leather. To facilitate removal of chromium from the tannery sludge and recycle to the tanning agent, these five ...