Datum semináře: 
Eidgenössische Technische Hochschule Zürich

Many trace elements are important for human health as they function as essential micronutrients, however, these elements are often only required in a narrow range of concentrations: too low dietary intakes can lead to deficiency and too high intakes to toxicity. Other elements are toxic at all dietary intake levels. Many health issues related to unsafe levels of trace elements are related to the environmental concentrations and distributions of these elements (e.g., in soils, crops and groundwater). However, in many locations in the world, these distributions are still largely unknown as analysis of trace elements can be expensive and time-consuming. In order to pinpoint areas where further studies are required, it is important to have the ability to predict areas at risk of occurrences of unsafe levels of trace elements. In this talk it will be shown how systematic broad-scale surveys of trace elements can be used, in combination with environmental factors, to predict concentrations of trace elements in soils and groundwaters in regions where this information is not available. Examples will include predictions of soil selenium concentrations on a global scale and regional scale predictions of arsenic in groundwater. Furthermore, it will be discussed how future climate projections can be used to predict future changes in trace element distributions.

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