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Books > Earth & environment > Earth sciences > Geology & the lithosphere > Soil science, sedimentology
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Polychlorinated Biphenyls (PCBs): Mammalian and Environmental Toxicology (Paperback, Softcover reprint of the original 1st ed. 1987)
Loot Price: R2,420
Discovery Miles 24 200
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Polychlorinated Biphenyls (PCBs): Mammalian and Environmental Toxicology (Paperback, Softcover reprint of the original 1st ed. 1987)
Series: Environmental Toxin Series, 1
Supplier out of stock. If you add this item to your wish list we will let you know when it becomes available.
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Polychlorinated biphenyls (PCBs) have been produced commercially
since be fore 1930. They proved to be highly versatile mixtures and
their uses continued to expand during the early 1970's even after
the unanticipated world-wide en vironmental contamination had been
discovered (Jensen et aI. , 1969; Koeman et aI. , 1969). Over
600,000 metric-tons were produced and/or used in the U. S. during
this time and it is estimated that worldwide production totaled
about 1,200,000 metric-tons (Table 1). With low acute toxicities
(Fishbein, 1974), these mixtures were considered gen erally
biologically inactive even though industrial exposure had
demonstrated he patic and dermatological effects (Fishbein, 1974;
Hansen, 1987). Thus, use and disposal were not carefully monitored
and it is estimated that one-third of the world-wide production of
PCBs has been released into the global environment (Table 1). Table
1. Estimated production and disposition of PCBs b U. s. a Worldwide
6 6 Production/use 610 X 10 kg 1200 X 10 kg Mobil environmental
reservoir 82 400 Static reservoirs In service 340 Dumps 130 Total
static 470 800 a NAS, 1979 b Tatsukawa and Tanaba, 1984 2
Environmental Distribution Many countries now impose strict
controls on the use and release of PCBs. Re lease into the
environment has declined dramatically in the last decade, but con
tinued release from reservoirs (Table 1) into burdened ecosystems
(Table 2) ap pears inevitable for several more decades (Barros et
aI. , 1984).
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