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Polycyclic Aromatic Hydrocarbons (PAHs)

Image showing several vehicles running on propane gas

Presence of high concentrations of PAHs in the workplace can lead to lower performance and staff performance. These sources of discomfort have a direct impact on the rate of absenteeism (repercussions on the entire production chain). Several air quality standards have been established to protect humans from the various pollutants that can affect their health. The most common symptoms are headaches, skin irritations and breathing difficulties. One of the reasons for the classification of volatile aromatic hydrocarbons (PAHs) in the list of priority pollutants by the Environmental Protection Agency (EPA) is the toxic nature of some of them. These are biologically active molecules that, once absorbed by organisms, lend themselves to transformation reactions under the action of enzymes leading to the formation of epoxides or hydroxyl derivatives ... PAHs can also cause a decrease in immune system response, increasing the risk of infection.

  • HAM Monocyclic Aromatic Hydrocarbons
  • PAH Polycyclic Aromatic Hydrocarbons, 30 parameters
  • Petroleum hydrocarbons chains from C2 to C50
  • C10 - C50 for fuel oil (heating oil)
  • C2 - C28 for motor oil (auto lubricant)
  • C2 - C20 for diesel (motor vehicle)
  • C2 - C10 for gasoline (automotive gasoline)

Alkanes: Alkanes are hydrocarbons. They contain only carbon (C) and hydrogen (H) atoms. The atoms of these compounds are united by simple bonds in the form of CnH2n + 2, where is a natural number (C2H6 ethane, C3H8 propane or butane C4H10), for alkanes whose structure is linear. The alkanes come mainly from petroleum products. In general, alkanes are less reactive and participate less than other VOCs in the formation of ozone.

Alkenes and alkynes: Alkenes are unsaturated hydrocarbons, characterized by at least one double bond between two carbon atoms. The crude formula is CnH2n, where is a natural integer for aliphatic compounds. They are mainly used in the chemical industry. Alkenes are formed during petroleum refining and are more reactive than alkanes because of the double bond. Alkynes are characterized by a triple bond between two carbon atoms. The formula of this family of linear hydrocarbons is CnH2n-2. Alkynes are very reactive.

Aldehydes and ketones (carbonyl compounds): Aldehydes are unsaturated organic compounds obtained from an alcohol that has lost a hydrogen atom (dehydrogenated alcohol). Their formula is CnH2nO. These compounds are formed by the incomplete combustion of fuels and wood. Ketones are chemical compounds derived from an alcohol by the loss of two hydrogen atoms. Their formula is CnH2nO or n> 2. Aromatic Hydrocarbons: Aromatic hydrocarbons are hydrocarbons containing at least one benzene ring.

Halogenated Hydrocarbons: This name covers chlorinated, brominated and fluorinated hydrocarbons. These VOCs are found in the air due, in particular, to their use as solvents. Their presence may also be due to their use as synthesis intermediates (in the manufacture of insecticides and plastics), as flame retardants (brominated derivatives), as refrigerants or as propellants of aerosol generators. These compounds are earlier stable and can remain in the atmosphere for a long time.

Hydrocarbon molecular structure

Polycyclic Aromatic Hydrocarbons PAHs (basic test identifying around 30 components)

  • Naphthalene
  • Acenaphthylene
  • Acenaphtene
  • Fluorene
  • Phenanthrene
  • Anthracene
  • Fluoranthene
  • Pyrène
  • Benzo (a) anthracene
  • Chrysene
  • Benzo summation (b, j and k) fluoranthenes
  • Benzo (a) pyrene
  • Indeno (1,2,3-cd) pyrene
  • Dibenzo (a, h) anthracene
  • Benzo (g, h, i) perylene
  • Dibenzo (a, l) pyrene
  • Dibenzo (a, i) pyrene
  • Dibenzo (a, h) pyrene
  • D12-o Benzo [a] pyrene
  • 2-Chloronaphthalene 0
  • Benzo (c) phenanthrene
  • Benzo (b) fluoranthene
  • Benzo (k) fluoranthene
  • Benzo (j) fluoranthene
  • 7,12-Dimethylbenzo (a) anthracene
  • 3-Methylcholanthrene
  • D10 Fluorene
  • D10 o-pyrene
  • D12-o Benzo (a) pyrene