When performing experimental work to study the recovery of NAPLs (non aqueous phase liquids) from porous media by water flood, scaling seems to be a critical step in the production of useful data that can be obtained from lab experiments. During many years, scaling was a very common technique in the petroleum industry. This technique was highly developed in the oil field in order to achieve gre...

The time domain reflectometry (TDR) technique is a geophysical method that allows, in time-varying electric field, the determination of dielectric permittivity and electrical conductivity wide class porous materials. Measurements volumetric water content (θw) soils most frequent application TDR Soil Science Hydrology. In last four decades several studies have sought to explore potential applica...

The effects of loading and aging pyrene in soils in the presence of four environmentally common nonaqueous-phase liquids (NAPLs) (hexadecane, 2,2,4,4,6,8,8-heptamethylnonane [HMN], toluene, and dimethyl phthalate [DMP]) on its subsequent desorption from those soils, earthworm accumulation, biodegradation, and extractability were tested by using two dissimilar soils. The presence of each of the ...

The effectiveness of removal of nonaqueous phase liquids (NAPLs) from the entrapment source zone of the subsurface has been limited by soil heterogeneity and the inability to locate all entrapped sources. The goal of this study was to demonstrate the uncertainty of degree of source removal associated with aquifer heterogeneity. In this demonstration, source zone NAPL removal using surfactant-en...

the development of a conceptual model that best accounts for the different parameters influencing lnapl fate and transport in groundwater is ultimate the key to a successful simulation of lnapl concentration in groundwater. characterization of hydrocarbon sources and identification of areas with heavy lnapl loadings from point and non-point sources is important for land use planners and environ...

Karst aquifers are a particular type of groundwater system that supplies drinking water in Puerto Rico, as well as in several U.S. regions and around the world. The karst aquifers contain cave systems that are vulnerable to contamination from toxic chemicals, such as TCE. This is because these contaminants tend to be trapped in the rock formations as nonaqueous phase liquids (known as NAPLs) an...

Soils and groundwater are often contaminated by complex organic mixtures also called Non Aqueous Phase Liquids (NAPLs). Several techniques such as drilling, monitoring of soil gas or injection tracers traditionally used to quantify NAPLs in aquifers but perform. The use natural 222Rn could be an easy cheap alternative. This method requires the knowledge radon NAPL-water partitioning coefficient...