Leaking underground concrete sumps used to store produced water have contaminated groundwater with gas condensate hydrocarbons at a gas production site near Ft. Lupton, Colorado. The source of contamination has been removed; however, a plume of hydrocarbon contamination extends some 46 m from the original source location. This is an agricultural area and the water table is rather shallow (about...

Widespread exposure to the volatile aromatic hydrocarbons, ortho-, meta-, and para-xylene occurs in many industries including the manufacture of plastics, pharmaceuticals, and synthetic fibers. This paper describes the development of a physiologically based toxicokinetic model using biomonitoring data to quantify the kinetics of ortho-, meta-, and para-xylenes. Serial blood concentrations of de...

Owing to environmentally-destructive impact of aromatic hydrocarbons, such as benzene, benzene ethyl, toluene, and xylenes or BTEXs, these materials are classified as hazardous pollutants in the air. This study studies cancer and non-cancer risk in District 12 of Tehran Municipality, through these components for two groups of employees or storekeepers and gas station customers. By measuring pol...

Owing to environmentally-destructive impact of aromatic hydrocarbons, such as benzene, benzene ethyl, toluene, and xylenes or BTEXs, these materials are classified as hazardous pollutants in the air. This study studies cancer and non-cancer risk in District 12 of Tehran Municipality, through these components for two groups of employees or storekeepers and gas station customers. By measuring pol...

Abstract Benzene, toluene, ethylbenzene and xylenes can contribute to hydroxyl reactivity secondary aerosol formation in the atmosphere. These aromatic hydrocarbons are typically classified as anthropogenic air pollutants, but there is growing evidence of biogenic sources, such emissions from plants phytoplankton. Here we use a series shipborne measurements remote marine atmosphere, seawater me...

We conducted a series of experiments to evaluate the gas and particle removal effectiveness potential for byproduct formation resulting from operation commercially available in-duct bipolar ionization device. Laboratory tests were with ionizer installed in small air handler serving large semi-furnished chamber. Chamber under (i) normal operating conditions characterize impact on concentrations ...

The development of catalysts for the hydrodeoxygenation bio-based feedstocks is an important step towards production fuels and chemicals from biomass. This paper describes in situ-generated bulk molybdenum tungsten oxides lignin-derived compound guaiacol. obtained were studied using powder X-ray diffraction, photoelectron spectroscopy, scanning electron microscopy, high-resolution transition di...

The deterioration or oxidation of the mineral oil in transformers poses risk short circuits. Convenient and effective methods are expected to be developed. Carbon-based sensor arrays were used this study identify quality variations for oil-filled by odors. sensitive layers odor-sensing system consisted different types GC stationary phase materials carbon black (CB) mixtures. We made a targeted ...