Effect of turbulence on volatilization of selected organic compounds from water
Abstract:Volatilization of selected organic compounds, with Henry's law constant larger than 10−3 atm-m3/mole, from water under turbulent conditions has been studied. Surface area:volume ratio and water-bulk turbulent intensity were the two major parameters that varied in the experiments. A model based on idealized surface renewal process is proposed. Based on this model, an equation incorporating the surface area:volume ratio and turbulent intensity (expressed in terms of the velocity gradient, G) is derived by solving appropriate mass-transfer differential equations. The derived model has been calibrated and verified with the experimental results. Both the theoretical model and the experimental results confirm that the volatilization of high-volatility compounds from water into air follows first-order kinetics with respect to the chemical concentration in water-bulk phase. The volatilization rate constant is found to be proportional to the surface area:volume ratio. It is also observed that the turbulent intensity in the water phase is an important parameter in controlling the volatilization of chemicals from the water.
Document Type: Research Article
Publication date: January 1, 1995
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