BIOL354 Lecture Notes - Lecture 9: Partition Coefficient, Environmental Toxicology, Hydrophobe
24 Jun 2020
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Co, co2, no, no2, so2, metals, hydrocarbons, and particulates. Not asked to list all the major pollutants for combustion and incineration etc. The environmental fate of contaminants depends on several properties, including: water solubility (e. g. mg l-1, hydrophobicity. Measured as the octanol-water partition coefficient kow or (log10kow) predicts tendency to partition between water and lipids (or water and biota, solids: vapour pressure. The ratio of vapour pressure to water solubility is the henry"s law coefficient, essentially an air - water partition coefficient (kaw: environmental half-life (reactivity, which is variable depending on conditions) Take equal volumes of distilled water & octanol. Add known amount of the test chemical & mix well. Measure the concentration of chemical in water & octanol: kow ratio of the two concentrations. Kow = concentration of chemical in octanol / concentration of chemical in water: high kow lipophilic/hydrophobic.
