Is silver a heavy metal
What are heavy metals? There is no binding scientific definition for this. Usually metals with a density greater than 5 g / cm³ are classified as heavy metals.
In addition to gold, silver, platinum and platinum metals, known heavy metals are, in particular, mercury, bismuth, iron, copper, lead, zinc, tin, nickel, cadmium, chromium and uranium.
Heavy metals are natural components of the earth's crust and get into the groundwater and the soil through erosion and weathering processes.
Heavy metals: trace elements and environmental pollutants
Many of the substances known as "heavy metals" and their compounds are primarily associated with toxic effects on humans, flora and fauna in the public debate. However, this does not apply without restriction: They are only present in certain chemical compounds and above a certain concentration (exception: lead). Some heavy metal compounds (e.g. gold and platinum) are used therapeutically, e.g. in autoimmune diseases and as cytostatic agents in some cancers.
Some heavy metals are trace elements that are essential for the human organism.
An example of a heavy metal that is both vital and potentially poisonous is copper: As a trace element, it is required by the human body, but if it is excessive, it can, among other things. lead to diseases of the liver ("copper-induced liver cirrhosis"). Other heavy metals that occur in small quantities in the body and have a biological function there are zinc and chromium.
Lead is of particular relevance to environmental medicine, and even in low concentrations it is harmful to the health of children in particular. Politicians reacted to this in the 1970s and 1980s by banning leaded water pipes and introducing unleaded petrol. Mercury is just as important.
The exposure of the human body to heavy metals can be determined with the help of human biomonitoring.
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