Modeling small-scale spills of aqueous solutions in the indoor environment.

A mass transfer model is proposed to estimate the rates of chemical emissions from aqueous solutions spilled on hard surfaces inside buildings. The model is presented in two forms: a set of four ordinary differential equations and a simplified exact solution. The latter can be implemented in a spreadsheet. User input includes ten parameters, which represent either the properties of the source or those of the building. All of them can be readily obtained. The proposed model is tested against and in good agreement with the measurements of simulated spill events in a room-sized environmental chamber. This model can be used by emergency response planners to estimate the time history of contaminant concentrations in indoor air.

[1]  Z Guo,et al.  Overall mass transfer coefficient for pollutant emissions from small water pools under simulated indoor environmental conditions. , 2003, The Annals of occupational hygiene.

[2]  Zhishi Guo,et al.  Review of indoor emission source models. Part 2. Parameter estimation. , 2002, Environmental pollution.

[3]  W. F. Reehl,et al.  Handbook of Chemical Property Estimation Methods: Environmental Behavior of Organic Compounds , 1982 .

[4]  Predicting evaporation rates and times for spills of chemical mixtures. , 2001 .

[5]  C. Bennett,et al.  Momentum, Heat, and Mass Transfer , 1962 .

[6]  Mark Nicas,et al.  Predicting room vapor concentrations due to spills of organic solvents. , 2003, AIHA journal : a journal for the science of occupational and environmental health and safety.

[7]  Zhishi Guo,et al.  Review of indoor emission source models. Part 1. Overview. , 2002, Environmental pollution.

[8]  Peter J. Drivas,et al.  Calculation of evaporative emissions from multicomponent liquid spills , 1982 .

[9]  J. Voigt,et al.  Handbook of Chemical Property Estimation Methods. Environmental Behaviour of Organic Compounds. Herausgegeben von W. J. Lyman, W. F. Reehl und D. H. Rosenblatt. Ca. 1000 Seiten, zahlr. Tab. American Chemical Society, Washington, DC, 1990. Preis: 49,95 $ , 1992 .

[10]  Carl L. Yaws,et al.  Handbook of vapor pressure , 1994 .

[11]  Lisa M. Brosseau,et al.  Development of a model to predict air contaminant concentrations following indoor spills of volatile liquids , 1997 .

[12]  Walter Hayduk,et al.  Prediction of diffusion coefficients for nonelectrolytes in dilute aqueous solutions , 1974 .

[13]  E. Olsen,et al.  ON THE PREDICTION OF EVAPORATION RATES—WITH SPECIAL EMPHASIS ON AQUEOUS SOLUTIONS , 1995 .