Cadmium

formula: Cd; CAS Registry Number: 7440-43-9

Rare metal which in nature is mostly associated with zinc ores

Cadmium and its compounds are used in a number of applications including semiconductors, batteries, and photovoltaic cells. In chemical and metal working industries cadmium compounds are used as coating materials, pigments and stabilisers.

Cadmium enters the environment mainly through anthropogenic activities. Natural emissions result from volcanic action and weathering. Contamination is found in the atmosphere, in soils, and waters.

Environmentally relevant characteristics of cadmium and its compounds include:

Specimen

  • Common mussel species as invasive animal in rivers and lakes with high information level for water pollution
  • Bioindicator in rivers and lakes
  • Fine insoluble mineral or organic particles in the water phase
  • Common brown alga of the coastal areas of the North and Baltic Sea
  • One of the most important edible mussel species common in the North and Baltic Sea
  • As the only viviparous fish in German nearshore waters, it is a bioindicator in nearshore coastal marine ecosystems.
  • A major primary producer in semi-natural and anthropogenic affected ecosystems.
  • A major primary producer in semi-natural and anthropogenic affected ecosystems.
  • A deciduous tree typical of ecosystems close to dense conurbations and an indicator for the characterisation of the immission situation during the vegetation period.
  • As the most dominant deciduous tree species in Central Europe, it plays a significant role in most nearly natural and also anthropogenically influenced forest ecosystems up to an altitude of 1100 m.
  • The roe deer is the most common of the larger herbivores (first order-consumer) to be found in the wild in Europe.
  • As an organism living at ground level, it is a major driver of the decomposition of organic material (e.g. plant litter).
  • As an organism living at ground level, it is a major driver of the decomposition of organic material (e.g. plant litter).
  • Soil is livelihood and biosphere for humans, animals, plants and soil organisms. All the substances brought in are transported, transformed and/or accumulated in the soil.
  • Student groups with an even number of female and male students at the age of 20 to 29.

Sampling area

Sampling period

1981 - 2019