Term for a group of metals, where there are a variety of different definitions such as atomic weight, density, chemical properties or toxicity. Colloquially, heavy metals are often considered to be "toxic substances". However, this is not correct, because heavy metals are essential for life iron. copper. manganese. molybdenum and zinc, A certain amount of arsenic is considered dangerous, lead, Cadmium, chromium, nickel and mercury (amalgam). But it depends on the amount, because some are essential in the human body trace elements required, for example chromium between 10 to 20 mg for regulating blood sugar levels and, according to the latest knowledge, arsenic up to 7 mg for various metabolic processes.
The heavy metals are taken up by plants from the soil and reach the people directly via the food chain or via animals and finally back into the soil. Since they are not or are difficult to degrade, they never get out of this cycle. As already mentioned, certain heavy metals lead to poisoning depending on the amount ground, Plant, animal or human. You can in viticulture through "passive measures" like fertilization fixed in the soil with alkaline agents and thus made harmless. In the winemaking If necessary, certain heavy metals such as copper or iron are removed from the young wine (see under beautiful ). There are defined limit values with regard to the maximum permissible quantities in wine; see a list below ADI (Acceptable Daily Intake).