Polycyclic aromatic hydrocarbons (PAHs)

Polycyclic aromatic hydrocarbons (PAHs) are a group of chemicals found naturally in coal,

crude oil, and gasoline. They are also created when waste is incinerated or during the high-temperature cooking of some foods. PAHs from these processes can attach to or form tiny airborne particles.

This study examined the level of PAH contamination in recyclates concerning the mechanical recycling process. Initially, the PAH content in polyolefin recyclates was analyzed to evaluate their suitability for various product categories. It was concluded that the recycling process might lead to the formation and accumulation of PAH in plastics.

Many PAHs are commonly known as carcinogens, mutagens, and teratogens, posing a significant threat to human health and well-being. Organs such as the skin, lungs, pancreas, esophagus, bladder, colon, and female breast are particularly susceptible to tumor development from prolonged PAH exposure. This exposure can elevate the risk of lung cancer and cardiovascular diseases (CVD), including atherosclerosis, thrombosis, hypertension, and myocardial infarction (MI). Preclinical studies have identified a link between PAH exposure, oxidative stress, and atherosclerosis.

Sources:

https://doi.org/10.1039/D0RA08554E

https://doi.org/10.1016/j.chemosphere.2022.133948

https://www.epa.gov/sites/default/files/2014-03/documents/pahs_factsheet_cdc_2013.pdf