Ozone Henry coefficient

The driving force for the mass transfer of the solute in the three-phase system can be determined with the solvent/water partition coefficient, just as the partition coefficient for gas/liquid phases, the Henry s Law constant, is used to determine the driving force for the mass transfer of ozone. A solute tends to diffuse from phase to phase until equilibrium is reached between all three phases. This tendency of a solute to partition between water and solvent can be estimated by the hydrophobicity of the solute. The octanol/water partition coefficient Kow is a commonly measured parameter and can be used if the hydrophobicity of the solvent is comparable to that of octanol. How fast the diffusion or transfer will occur depends not only on the mass transfer coefficient in addition to the driving force but also on the rate of the chemical reaction as well. 

Ethyl acrylate is a volatile (38hPa at 20°C) liquid under normal environmental conditions. At equilibrium in the environment, ethyl acrylate will partition primarily to air (94%) with lesser amounts to water (5.6%), soil (<1%), and sediment (<0.1%). In air, ethyl acrylate will be removed by reaction with photochemically produced hydroxyl radicals (11.8 h half-life) and ozone (33 h half-life). When released to water, ethyl acrylate will volatilize to air (Henry s law constant of 25 Pa m mol -1) or be biodegraded (57% removal in 28 days). Based on its relatively low octanol-water partition coefficient (logKow of 1-18), ethyl acrylate does not pose a significant bioaccumulation hazard. 

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