Экология

Water quality - contamination with heavy metals

Principle

Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanic or similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlled by these enzymes may ...

Electrostatic flue gas cleaning



Principle

Smoke consists of particles of solid substances suspended in gas. Fog is made up of suspended droplets. In cigarette smoke, as in many industrial processes, smoke and fog are frequently present together. The removal of particles contained in gases - predominately waste ...

Model experiment on the desulphurisation of flue gas

Principle

German coal contains an average of one tonne of sulphur per 100 tons of coal. The combustion of this 100 tons of coal "produces" about two tonnes of sulphur dioxide. In comparison a large 700 megawatt power plant which burns about 200 tons of coal per hour produces ...

Changes of the light conditions in a deciduous forest

Principle

Why are there only a few different kinds of plants in a deciduous forest? Except for having trees that are all approximately of the same height, hardly any other plants grow in a deciduous forest, except for young plants of the same type of trees. This experiment shows how the ...

Changes of the light condition in a forest with SMARTsenses in a deciduous forest

Acidity changes of a watercourse

Principle

The pH value (a measure of the concentration of hydrogen ions) in running waters depends on the geological conditions, the pollution load that is caused by agricultural production, and on plant activities. This experiment shows how the pH value of a stream changes even at a short ...

Acidity changes of a watercourse with SMARTsense

Comparison of soil and air temperatures in the course of a day with Cobra4

Principle

How does the temperature of the air affect the temperature of the soil in the course of a day?

Benefits

• Experiment is part of an experiment set with numerous experiments in ecology
• Universal handheld measurement device can also be used for other measurement parameters ...

Comparison of soil and air temperatures with SMARTsense course of a day with Cobra4

The pH value of various soils

Principle

Information concerning the quality of soils is of great importance for agricultural production. The students are familiarised with this subject via two experiments with pH measurements that show how much soils may differ from each other (experiment  "Characteristic pH values ...

The pH value of various soils with SMARTsense

Salinity of soils and plant substrates

Principle

How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient salts for plant growth and to ...

Salinity of soils and plant substrates with SMARTsense

Raised bog and fen

Principle

Bogs and fens are habitats of plants that are specialised in soils with constant excess water. Apart from this specialisation, bogs and fens differ significantly from each other. Raised bogs and fens, for example, have different plant communities, which is due to their varied ...

Salinity changes of a watercourse

Principle

This experiment shows how the salt that is washed out of an abandoned potassium rock pile drastically increases the salinity of a watercourse, as well as how the salinity decreases only slightly further downstream, and how the salinity can still be measured after the stream has ...