Misleading concepts about the true sources of PAHS in the environment

Misleading concepts about the true sources of PAHS in the environment

Polycyclic Aromatic Hydrocarbons, or PAHs, on short consist of over 100 chemicals containing hydrogen and carbon in fused-ring structures. PAHs are extremely common in the environment, and they can be identified in petroleum, carbon, wood, coal, garbage, oil, gas, tobacco or charbroiled meat. The disturbing discussions that have been raised against PAHs are mainly caused because of the accusations that refer to the PAHs being carcinogens for humans, toxic for fish and aquatic life. The hot topic of coal tar has also been brought up many times, and a lot of banning measures have been taken, due to the fact that one Polycyclic Aromatic Hydrocarbons can be found in coal tar sealant.

Lately the campaign against the use of refined coal tar sealers has been gaining traction among municipalities and counties across the U.S. The end result is that the use of these products is being systematically banned across the country, with no major change in PAH levels in our surroundings being recorded. So what really happened?

The fact is that there are so many other PAH sources in the environment should focus the attention and the course of the discussions and concerns on these, rather than constantly on the dangers of coal tar. If we were also to think about the fact that diesel fumes or the charcoal that appears on grilled hot dogs are common sources of Polycyclic Aromatic Hydrocarbons in the environment, the whole campaign that is being lead against the use of coal tar is does not have a very strong base.

Ambient air, smoke and food count among the most popular sources of Polycyclic Aromatic Hydrocarbons, and the different degrees of exposure and ingestion to PAH vary according to the actual that comes with the unprocessed grains or cooked meats people eat every day, for instance. The all-time favorite American diet is said to bring about 1 to 5 micrograms of PAH per day, and the quantity increases as the quantity of meat increases.

Rather than just coal tar sealants, PAHss reach the environment through mainly other sources, namely urban runoff, industrial effluents, natural oil seeps, petroleum spills, vehicle exhaust or gas plant residues, to name just a few important ones. So why would the solution to limiting the amount of PAHs entering our environment just be confined to doing away with just one of the known causes and not tackling all the others? Singling out just one of the above factors will not reduce the overall levels of PAHs around us. Common sense should tell us that all known PAH contributors should be studied and addressed if there is to be any noticeable change in overall levels of contaminants in our environment.

The air, the water, the soil, the overall environment and even the interstellar space have been studied and proof of Polycyclic Aromatic Hydrocarbons in all these places has been shown, so activists that lobby against the use of coal tar sealants should be more focused on complete and trustworthy scientific proofs, rather than deceiving studies.

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