M. W. Trahan, J. S. Wagner, I. R. Shokair, G. C. Tisone, P. C. Gray Sandia National Laboratories Albuquerque, NM 87185 Abstract Intelligent algorithms have been used to estimate the concentrations of individual components in complex mixtures scanned by a multispectral UV laser remote-sensing system. The data was acquired during the Kitfox test series at the 1.4 km site on Frenchman Flats at the...

Global sensitivity analysis (SA) was used during the development phase of a binary chemical physiologically based pharmacokinetic (PBPK) model used for the analysis of m-xylene and ethanol co-exposure in humans. SA was used to identify those parameters which had the most significant impact on variability of venous blood and exhaled m-xylene and urinary excretion of the major metabolite of m-xyl...

An energy-efficient adsorptive molecular sieving strategy is reported using a crystalline trianglimine macrocycle to separate the elusive m -xylene isomer with over 91% purity.

Plastic pipes are susceptible to thermal degradation which can produce volatile organic compounds such as benzene, toluene, ethylbenzene, and xylene that leach into drinking water.

introduction: the purpose of this in vitro study was to evaluate three common gutta-percha solvents’ effectiveness in dissolving three different types of root canal sealers. materials and methods: the solubility of three different root canal sealers (ah plus, apexit plus and endoflas fs) was assessed in xylene, refined orange oil, tetrachloroethylene and distilled water (control). one-hundred t...

In this study, the effect of inlet concentration pollutants, empty bed residence time (EBRT) and liquid recycling velocity on performance BTF was explored. The results showed best operating characteristics biotrickling filter for study were at an 500 mg/m3�Cthe EBRT 300s 25.46 m h-1. At condition, total removal efficiency pollutants can reach more than 90%. Among them, toluene ethylbenzene abov...

Abstract The present study evaluated the contamination by monoaromatic hydrocarbons (BTEX: benzene, toluene, ethylbenzene, and xylene) of subsurface gas stations adjacent residences in Amazonian town Bragança, northern Brazil. We combined ground penetrating radar (GPR) geophysical tool, to detect possible plumes BTEX, with chromatography (GC) mass spectrometry (MS), which were used diagnose pre...