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Effect of turbulence on volatilization of selected organic compounds from water

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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.

Keywords: MASS TRANSFER; MODEL; TURBULENCE; VOLATILE ORGANIC COMPOUNDS

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143095X131240

Publication date: January 1, 1995

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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