Übersetzung für "Schadstofffahne" in Englisch

The transfer of pollutants through seepage and groundwater creates a contaminant plume.

Modelling of a three-dimensional contamination plume requires sampling at different depth levels.

However, the common models don’t include the volatilisation of volatile substances from the plume.

In the plume they can, under favourable conditions, lead to a reduction in contaminant concentrations.

A direct comparison of isotope values in a contaminant plume already provides evidence of natural attenuation.

For detailed investigations, depending on the extent of the contaminant plume, up to 30 measuring points can be taken into account.

The pollutant plume can be divided into zones with different remediation targets (see LABO 2015).

Areas of operation include the activation and promotion of the biodegradation of groundwater contaminations in the contaminant plume as well as the active remediation of damage sources with the help of rinsing procedures using alcohols, surfactants or chemical remediation methods.

The processes found under ground (current, transport, chemical reactions, biological reactions) are depicted with a numerical model, and in this way simulate the spread of a contaminant plume.

The spread of the contaminant plume is difficult to predict, as it is a very inhomogeneous process.

On July 17, the researchers carried out a HALO measurement flight into the large-scale pollutant plume over London. This was done jointly with the BAe 146 research aircraft belonging to the British FAAM (Facility for Airborne Atmospheric Measurements) .

The ESTIMATE project deals with the impact of internal and external stressors on DNAPL contaminant (organic phase with a density higher than water) source zone formation and their implications for final contaminant plume extension in the aquifer.

If certain hydrogeological site properties are known (e.g. groundwater flow velocity), it is possible to derive spatial and temporal degradation rate constants, absolute degradation rates and the future extent of the stationary plume.

According to c urrently developed modelling the natural degradation and retention processes will lead the to a stationary contamination plume after 50 years. However, depending on its intensity, air sparging can lead to a load reduction, reducing the plume length by up to 4 to 6 fold.

Specific patterns of isotopic signatures in a contaminant plume clearly indicate secondary sources of pollution – especially lighter (negative) isotope values in the effluent.

The formation of a pollutant plume in the aquifer is, however, slowed down by natural retention and self-cleaning processes and may even come to a complete halt.

Depending on the predominant redox reaction, we find an enrichment of the heavy isotopes of nitrate (15N, 18O) or sulfate (34S, possibly also 18O) in a contaminant plume.

The time variations in the flow conditions can significantly affect the form and length of the pollutant plume.

At the time of installation, the pollutant plume displayed average VOC contamination levels at the facility's infeed of 15,000 µg/l.

The time variations in the flow conditions can significantly affect the form and length of the pollutant plume.

Until 2006, about 300,000 m 3 of groundwater were recove- red per year. The pumping cone produ- ced helped to fix the contaminant plume more or less on the site.