Zur Schwermetallaufnahme landwirtschaftlicher Nutzpflanzen aus klaerschlammgeduengtem Boden.
1984
Diez T.
The establishment of limiting values for heavy metal concentrations in soils as stipulated in the new sewage sludge ordinance was based on the experience that excessive heavy metal concentrations in soils led to growth deformities in plants or consumption of these plants would be a health hazard. The experimental results presented here show that the heavy metal uptake of plants is dependent on a number of factors, e.g. - on heavy metal concentration and distribution in the soil; - on soil properties, such as type of soil, pH, humus content; - on plant species, plant organ, type; - on climatic influences during the growth period. The new sewage sludge ordinance takes these factors into consideration. The limiting values are thus fixed at levels low enough so that even under unfavourable circumstances no harmful heavy metal effects are to be expected.
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