Lecture #4

Question 1

Kow

Answer 1

-octanol-water partition coefficient -determined using a separatory funnel -usually estimated with a simulation rather than experimentally

Question 2

relationship between Kow and BCF

Answer 2

directly related

Question 3

exceptions to the Kow-BCF trend

Answer 3

1. mercury: low Kow but high BCF 2. cancer drugs: high Kow but low BCF

Question 4

Concentration Equation

Answer 4

conc. in tissue = fugacity in tissue* Z in tissue Z = 1/Henry’s constant

Question 5

biotransport

Answer 5

the movement of an organism containing a contaminant from one area to another and releasing the compound

Question 6

atmospheric transport

Answer 6

most compounds have at least some ability to volatilize and can do so at the Equator and then condense again at the Poles

Question 7

Concentrating a sample of DDT

Answer 7

extract it from seawater using octanol in a separatory funnel, then evaporate off the solvent

Question 8

fugacity vs. concentration graph

Answer 8

Question 9

How can the shark have a higher than equilibrium fugacity?

Answer 9

inputs energy via digestion to extract nutrients from food and put them into storage (by means of enzymes, circulation, storage in adipose)