chlorophenols, are environmental
pollutants of great health concern.
the 19 different chlorophenols:
have been listed by the
US EPA as priority pollutants.
These compounds have
widely been used in the production of pesticides, herbicides,
and wood preservatives. They can also be generated as
byproducts in industrial operations, such as the paper pulp
bleaching process and water disinfection with chlorine.
released into the environment, chlorophenols can enter
water streams through various transport mechanisms and
can also chemisorb onto soil surfaces and aquatic sediments.
Due to their
toxicity, these xenobiotics are consequently
harmful to humans, animals, and fish that are exposed to
such contaminated environments. Because of their toxic
properties to microorganisms, these compounds are also
recalcitrant to conventional biological treatment.
substances may, however, be treated
Previous studies suggest that photolytic transformation
is one of the major mechanisms contribute to the degradation
of chlorophenols in aquatic environments.