Where are polycyclic aromatic hydrocarbons found?

Polycyclic aromatic hydrocarbons (PAHs) are a class of chemicals that occur naturally in coal, crude oil, and gasoline. They result from burning coal, oil, gas, wood, garbage, and tobacco. PAHs can bind to or form small particles in the air.

What is the and PAH in water quality?

olycyclic aromatic hydrocarbons (PAHs) are a group of organic compounds that contain two or more benzene rings in their structure.

How does PAH get into water?

PAHs can reach water bodies mainly through dry and wet deposition, road runoff, industrial wastewater, leaching from creosote-impregnated wood, petroleum spills, and fossil fuel combustion [16-19]. They are generally teratogenic, carcinogenic, and mutagenic and may induce lung, bladder, as well as skin cancer.

How is benzene made?

Benzene is produced naturally by volcanoes and forest fires. In homes, benzene may be found in glues, adhesives, cleaning products, paint strippers, tobacco smoke and gasoline. Most benzene in the environment comes from our use of petroleum products. Benzene quickly evaporates from water or soil.

What is an example of an aromatic hydrocarbon?

Some examples of aromatic hydrocarbons are Methylbenzene, Naphthalene, Phenanthrene, Trinitrotoluene, and o-dihydroxybenzene.

What is the EPA approved limit of PAHs?

Workers must receive medical surveillance if exposed above the PEL. EPA’s maximum contaminant level (MCL) for PAH in drinking water is 0.2 ppb of drinking water.

What is PAH soil?

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants generated primarily during the incomplete combustion of organic materials (e.g. coal, oil, petrol, and wood).

What foods contain PAH?

The following foods could contain PAHs:

  • bivalve shellfish accumulate PAHs from seawater and sediment Limits are therefore applied to ensure that excessively-contaminated mussels or oysters do not enter the food chain.
  • smoked products.
  • certain cooked meat products such as flame-grilled burgers.

Do Cigarettes contain benzene?

Cigarette smoking and secondhand smoke are important sources of exposure to benzene. Cigarette smoke accounts for about half of the exposure to benzene in the United States. Benzene levels in rooms containing tobacco smoke can be many times higher than normal.

Does black tea have PAH?

The analysed tea samples showed an increasing presence of PAH in the following order (mean value): black tea < red tea < green tea < white tea. However the highest content of PAH was found in the one brand of black tea bag both in sum of PAH and BaP content.