Industrial Textiles & Plastics Ltd.

- Permeation Modeller Software

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Given a known level of contaminants in a soil, how effective will a barrier membrane be in keeping the soil on the “clean” side safe from the contaminants?. Reporting on over 200 hydrocarbons and toxic chemicals, Puraflex Permeation Modeller is a powerful and effective software program that calculates site-specific permeation rates for soil contaminants.

Following a contaminated soil test analysis, contaminant concentrations are uploaded into the Puraflex program.  Key variables directly influencing contaminant permeation rates (temperature, soil moisture etc.) are entered and the software then calculates the project-specific permeation rates which can be imported directly into environmental risk assessment modelling software.

Interestingly, soil moisture content has a significant influence on the Effective Concentration levels at the face of a geosynthetic membrane.  As soil moisture increases, the more a hydrocarbon will partition away from the moisture-laden soil and congregate on the surface of the membrane thus increasing its Effective Concentration which, for some hydrocarbons, could be over 60 times higher in an environment with only 10% moisture.

Puraflex Permeation Modeller is provided free of charge to qualified environmental and geotechnical consultants. The Standard version reports on Liquid Migration and the Professional upgrade includes Vapour Migration. Registration is required for licence keys.

Permeation data comparisons of different geosynthetic membrane polymers.  Please note that Puraflex performance is compared with 1.5mm thick membrane materials, whereas Puraflex is 450 microns.  Permeation based on soil temperature of 20 deg C and challenge chemicals at 100 mg/kg concentration.  Units mg/sqm/yr.

These results ignore soil moisture partition coefficients.  Moisture in soils have have a significant effect on the permeation rates of hydrocarbons through HDPE and other monolithic membranes.  Puraflex Permeation Modeller software provides the option to use Soil Moisture Partition Coefficients.

BTEX permeation data compared between Puraflex (Red) and HDPE (Blue). Please note that Puraflex performance is compared with 1.5mm thick HDPE, whereas Puraflex is 450 microns. Permeation based on soil temperature of 20 degC and challenge chemicals at 100 mg/kg concentration. Units mg/sqm/yr.

These results ignore soil moisture partition coefficients. Moisture in soils have a significant effect on the permeation rates of hydrocarbons through HDPE and other monolithic membranes. Puraflex Permeation Modeller software provides the option to use Soil Moisture Partition Coefficients.

The unique Puraflex Permeation Modeller (PPM) software program enables you to:

  1. Upload Soil Analysis chemical concentration values - the programme recognises chemical names, synonyms and/or CAS No.
  2. Enter project-specific variables: Soil Temperatures, Partition coefficients, Soil Densities etc.
  3. Export results to Excel for incorporating directly into risk assessment software models (e.g. CLEA)

Puraflex Permeation Modeller is provided free of charge to qualified environmental scientists and design engineers. The Standard version reports on Liquid Migration and the Professional upgrade includes Vapour Migration. A software licence is required for extended use.

Contact our technical department

ITP's technical department can run your soil analysis results through the PPM software, thereby showing the benefits of the professional version of the software before purchasing it.

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