ESM222Lab3

ESM222Lab3 - ESM 222 Fate and Transport of Pollutants in...

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Lab #3: Equilibrium Distribution Due Date: 5/02/2008 Objective: Understand the partitioning behavior of different organic compounds when released into different compartments: ± Air/Water (Henry’s Law, K H ) ± Octanol/Water (K ow ) ± Air/Water/Sediments We will use a subset of the organic compounds we observed in Lab 2, namely: ± TCE ± MTBE ± Hexane (change from dodecane which has very low C w sat ) Methods: Preparation of Aqueous Solutions Instead of adding direct NAPL, we will add the organics already dissolved in water. This will speed up the equilibration process. In the separation funnels in the fume hood you will find NAPL/water systems tha t have been in con tac t for weeks, so that the water is fully saturated with the organic of interest. We want to prepare aqueous solutions with approximately 20 mg/L (about 20 ppm) of organic, except for Hexane, which will be 10 mg/L (about 10 ppm). ± For Hexane, the equilibrium saturation is about 10 ppm, so you can take the amount of water you need directly from the
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ESM222Lab3 - ESM 222 Fate and Transport of Pollutants in...

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