Used in many industrial and commercial application
Toxic to living organisms
Specific qualities of the compound made it very useful in the
High thermal and chemical resistance
Can’t be broken down through natural conditions – heating and chemical reactions
The chemical remains in the environment
Travel large distances
Slightly dissolves in water and be stored into the sediment
Stays in the soil where it can be consumed by worms
Worms => Small fish => Large fish => Mammals/ Birds
This causes the amount of PCB in the fat of the different organisms to increase
Can cause – aches, rashes, liver damage, anemia, stomach/thyroid glands injury
Weaker immune system and behavioral alternations, reproduction system weakened
Most feared damage – can cause cancer in human beings
Epidemic of a disease similar to chloracne
Soon after the outbreak – a team assembled to investigate
Cause of the epidemic – contaminated rice oil
Poison = PCB, Disease = Yusho (“Oil disease”)
Used to extinguish forest fires
In production of textile and electronic devices.
In 1999 North American industry used around 34,000 metric tons of PBDEs.
IT is harmful to humans
It was found in people all over the world.
In 2008 polybrominated diphenyl ethers were banned because it was found to be bioaccumulated in breast milk. Almost every human on the planet have consumed flame retardants
Humanity and the top of the food chain.
Trough the food chain b ioconcentration rises.
When eating a predator human can consume b ioconcentration of 100kg of plankton in one meal and even more.
That means that the biggest victim of the pollution is us.
Barbalace, Roberta C. “The Chemistry of Polychlorinated Biphenyls.” Еnvironmental Цhemistry . J.K. Barbalace, inc., 2010. Web. 14 June 2010. <http://environmentalchemistry.com///pcb.html>.
Masanori Kuratsune, et al. “Epidemiologic Study on Yusho, a Poisoning Caused by Ingestion of Rice Oil Contaminated with a Commercial Brand of Polychlorinated Biphenyls*.” National Center for Biotechnology Information . N.p., Apr. 1972. Web. 14 June 2010. <http://www.ncbi.nlm.nih.gov///PMC1474867//-0115.pdf>.
Polychlorinated Biphenyl Chemical Structure . N.d. Science Leadership Academy . N.p., n.d. Web. 14 June 2010. <https://sci10bestq3bm.wikispaces.com/silver+class+%2709>.