
Heavy metals include the elements arsenic, cadmium, chromium, mercury, lead and thallium. They typically enter the body via the food chain, ambient air or drinking water. Unfortunately, since the beginning of the industrial revolution, waterways and coastal waters have been polluted with these elements and others. Contaminants have also been introduced into the soil with negative consequences not only for the food chain, but also for drinking water. To safeguard the environment, strict regulations have been drawn up in Europe and the United States as well as in many other countries around the world.