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Degradation of Phenolic Compounds Using Laccase or Peroxidase Enzymatic Treatment
(2010-07-16)
To remove ammonia from wastewater most refineries use biological treatment employing suspended biomass because there is no secondary pollutant. The main purpose of biological treatment is to accelerate the oxidation process ...
Application and Evaluation of WEPP in a Forested Watershed with Perennial Streams
(2010-01-06)
Forests generally have low erosion rates unless they are disturbed by harvesting operations or road construction. These common disturbances typically cause increase in the sediment yield which is reduced after vegetation ...
Dewatering Rock Crushing Fines Using Geotextile Tubes
(2010-01-06)
A study on dewatering rock crushing fines using geotextile tubes was conducted. The laboratory portion included rapid dewatering tests and hanging bag tests to evaluate the dewatering efficiencies of the geotextiles as ...
Alternative Fuels and Their Effects on Portland Cement
(2010-07-19)
The production of portland cement is a complex process involving several materials, complex systems, and temperatures on the order of 1500 °C. Non-renewable fossil fuels such as coal, petroleum coke, and natural gas have ...
Removal and Immobilization of Arsenic in Water, Ion Exchange Brine, and Soil
(2010-12-07)
Removal of arsenic, As(III) and As(V), in water and soils is one of the most challenging environmental issues. Six polymeric ligand exchangers (PLEs) were synthesized by functionalizing various polymeric matrices (known ...
Effects of Polyacrylamide Hydrogel on the Properties of Sand
(2010-08-18)
A study on the effects of polyacrylamide hydrogel on the properties of Ottawa sand was conducted. Laboratory testing included stress-controlled cyclic triaxial tests, consolidated undrained triaxial compression tests, and ...
Evaluation of Hydromulches as an Erosion Control Measure Using Intermediate-Scale Experiments
(2010-05-20)
Discharge of sediment-laden stormwater from active construction sites, such as highway construction projects, is a growing concern in the construction industry (Zech et al. 2007, 2008). The United States Environmental ...
Refining a Laboratory Procedure to Characterize Change in Hot-Mix Asphalt Surface Friction
(2010-12-15)
The surface of asphalt pavements gradually lose friction resistance as a result of changes in surface texture and aggregate polishing with repeated traffic application. The loss of pavement friction is a major safety ...
An Assessment of U(VI) Adsorption at Multiple Scales
(2010-10-21)
Iron (III) (oxyhydr)oxide coatings on soils and sediments are one of the most important factors in controlling the adsorption and transport of U(VI) in the subsurface. In this study, iron-coated sands were prepared via two ...
The Application of Self-Consolidating Concrete (SCC) in Full Scale Drilled Shafts
(2010-08-09)
Drilled shafts are being built larger and deeper, and this has increased the challenge in creating quality drilled shafts. Due to longer placement times and more required reinforcement, problems have been discovered with ...