Pilot study of radon volatilization from showers with implications for dose

Article Abstract:

Volatilization from showers can contribute substantially to residential indoor radon air concentrations. This was indicated by the results of a pilot study of radon volatilization from domestic showers. A shower was operated at a water flow rate of 2 and 4 L/min. at 22 degrees C. Average fractional volatilization was ^0.60 and ^0.70, respectively. Comparison between inhalation doses in nanogray (nGy) for four 10-min. shower experiments and for continuous breathing indoors for 24 hours. Calculation of inhalation dose to lungs ranges in value from 1.5 to 11 nGy as against a calculated daily inhalated dose of 180 nGy.

Industrial Gas Manufacturing, Industrial gases, Radon, Environmental aspects, Indoor air quality, Showers (Baths), Showers (Plumbing fixtures), Atmospheric radon

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Experiments and modeling of the transport of trichloroethylene vapor in unsaturated aquifer material

Article Abstract:

Three absorption models used for evaluating water-unsaturated conditions in which trichloroethylene was made to flow through a column of aquifer sand were assessed to describe mass-transfer processes of volatile organic compounds in soil. Models employed to study mass-transfer included the two-site first-order model, two-site spherical diffusion model, and the distributed site model (GS). Results show GS distributed site model to be superior to the other two models when subjected to the same number of adjustable parameters and when the other two were given additional adjustable parameters.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Trichloroethylene, Management, Hazardous wastes

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Modeling volatilization of trichloroethylene from a domestic shower spray: the role of drop-size distribution

Article Abstract:

A study measured and modeled the drop-size distribution of trichloroethylene from a domestic shower spray, and the methods developed in the study could help model volatile organic compound volatilization. The distribution data were compared to three internal mass transfer models. The eddy diffusion model and the oscillating drop model were effective in predicting distribution. The third model, which restricted mass transfer to a thin liquid film, did not fit the distribution data.

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