Definition of environmental organic pollutants

Organic pollutants refer to those organic compounds that enter the environment and can adversely affect organisms or ecosystems. It can be divided into natural organic pollutants and synthetic organic pollutants. Most of these pollutants are rapidly decomposed into harmless substances in environmental media (atmosphere, water, biology, etc.). ), such as formaldehyde, benzene and so on. Volatilization of paint, interior decoration materials, smoke from smoking and cooking. Some of these organic substances can exist in environmental media for a long time, which is usually called persistent organic pollutants. These substances do great harm to the metabolism of human beings and animals, and have attracted widespread attention. Priority pollutants proposed by EPA: ① Metal and inorganic compounds; 2 pesticides; ③ Polychlorinated biphenyls (PCBs); ④ Halogenated aliphatic hydrocarbons; 5 ethers; ⑥ monocyclic aromatic compounds; ⑦ Phenols and cresols; 8 phthalate esters; 9 polycyclic aromatic hydrocarbons; Attending nitrosamines and other compounds. Among them, the US Environmental Protection Agency announced 16 polycyclic aromatic hydrocarbons with priority control (Figure 8-26).

Figure 8-26 Structural Diagram of 16 Polycyclic Aromatic Hydrocarbons Published by US Environmental Protection Agency

1- naphthalene; 2- acenaphthene; 3- acenaphthene dihydro; 4- fluorene; 5- Philippines; 6- anthracene; 7- fluoranthene; 8- pyrene; 9- Benzanthracene; 10- buckling; 11-benzo (b) fluoranthene; 12-benzo (k) fluoranthene; 13-benzo (a) pyrene; 14- indeno (1, 2,3-CD) pyrene; 15-dibenzo (a, h) anthracene; 16-benzo (ghi) perylene