How do you get rid of PCBs in soil?
In US, the most common remediation technology for PCB-contaminated soil or sediments are incineration or disposal in landfills (Gomes et al., 2013). Other strategies such as biological, chemical, physical and thermal methods are also widely applied in PCB remediation.
How long do PCBs stay in soil?
The time it takes for half of the amount of PCBs (initially) present to be broken down ranges from 3.5 to 83 days for molecules with 1 to 5 chlorine atoms. In water, PCBs are essentially broken down by the effect of sunlight (photolysis).
Where are PCBs most commonly found?
They have been detected in air, water, soil, and sediments throughout the world. PCBs last a long time in the environment before breaking down and may find their way into the food chain. Low levels of PCBs can be found in fish, shellfish, meat, poultry, milk, dairy products, and other foods.
Are PCBs mobile in soil?
PCBs are transported from soil and sediment to the atmosphere.
How do you test for PCBs in soil?
A sample of the soil to be tested is extracted with a hydrocarbon based solvent. The resulting extract is filtered to remove moisture and inorganic salts. The dried extract is reacted with metallic sodium and a catalyst to strip chloride from any PCB that may be present.
What is PCB contaminated soil?
PCBs, or polychlorinated biphenyls, are industrial products or chemicals. PCB contamination is high in the Housatonic River and New Bedford Harbor in Massachusetts. According to the EPA, PCBs belong to a broad family of human-created organic chemicals known as chlorinated hydrocarbons.
How do PCBs get into soil?
Some commercial PCB mixtures are known in the United States by their industrial trade name, such as Aroclor. Prior to 1977, PCBs entered the air, water and/or soil during their manufacture, use and disposal; from accidental spills and leaks during transport; and from fires or leaks by products containing PCBs.
What does PCB do to humans?
PCBs are a probable human carcinogen. Studies of PCBs in humans have found increased rates of melanomas, liver cancer, gall bladder cancer, biliary tract cancer, gastrointestinal tract cancer, and brain cancer, and may be linked to breast cancer.