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of commercial products that are causing environmental concern and are being transported to remote regions by this mechanism. The topic of pharmaceutical contamination of drinking water will be discussed in Chapter 16.

Polynuclear Aromatic Hydrocarbons (PAHs)

One of the most common and ancient types of environmental pollutant, whether in air, water, or soil, is a large series of hydrocarbons known as PAHs. We first discuss the molecular structure of these compounds, then relate their occurrence in the environment and their health effects on humans.

The Molecular Structure of PAHs

There is a series of hydrocarbons whose molecules contain several six-membered benzene-like rings connected by the sharing of a pair of adjacent carbon atoms between two adjoining fused rings. The simplest example is naphthalene, C10H8:

Continue reading here: Hcr

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