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A high concentration of metals.
Highly chlorinated organics.
Inorganic salts.
Halogenated volatile organics.
Petroleum hydrocarbons.
TRUE
FALSE
The toxicity of contaminants.
The initial concentration of contaminants.
Properties of the contaminated soil.
The microorganisms selected.
All of the above.
The microorganisms adapting to new environment!
Maximum growth rate of the microorganisms (cells dividing at constant rate)!
Reaching exhaustion of substrate (running out of food): the number of dying cells exceeds the number newly formed.
No more food: the number of dying cells exceeds the number of new.
Rate the cell population decreases may slow if dead cells begin to supply the substrate needed for new cells.
The total population of microorganisms builds up.
The total population of microorganisms decreases.
The contaminant concentration is greatest
The contaminant concentration is lowest.
The contaminant concentration is neither too high nor too low.
There are no microorganisms left.
The temperature has been increased to 100 degrees centigrade.
Much quicker than an aromatic hydrocarbon (of low molecular weight).
Much slower than an aromatic hydrocarbon (of low molecular weight).
Degrade in
Accumulate in