FREQUENTLY ASKED QUESTIONS
Frequently asked questions
Surfactants are compounds that act as solvents of dense non-aqueous phase liquids inmiscibles in water, allowing them to reduce this surface tension, to reduce their interface tension and to increase their solubility.
The chemical oxidation is a soil remediation technique that destroys contaminants by oxidizing them. This is, they are transformed in CO2, water and free chlorine in this case, liberating electrons. The free chlorine forms stable salts with the magnesium or the sodium existing in the environment.
Aquifer Remediation Enhanced by Surfactants (SEAR) is a soil remediation technique that allows for a higher extraction is contaminants, helped by the action of surfactants. It is used not only in granular aquifers (gravels), but also in fractured aquifers (fractures in rock).
Persistent Organic Pollutants.
Mixture of liquid and dense substances, non-miscible in water.
IN SITU CHEMICALOXIDATION. In situ technique for soil remediation.
Technique to be developed in a demonstrative project where well known soil remediation techniques are combined with the action of surfactants.
Volatile Organic Compound
Semi – Volatile Organic Compound
Commercial name of an organochlorine with generic formule C6H6Cl6 -specifically, gammavisomer-1,2,3,4,5,6- hexachlorcyclohexae-, used as an insecticide in agriculture; for the lice and mange treatment in humans; and against parasites in livestock. The lindane is a pesticide prohibited all over Europe, which was being produced for 14vyers in Sabiñánigo.
Pollution or contamination due to chemical elements that, in very low concentrations are harmful for life, such as the arsenic, lead, mercury, cadmium. The objective of the remediation will be the formation of stable salts or the isolation from the environment.
Contamination due to substances formed by carbon, hydrogen and another element. They are harmful for life due to the characteristics of the molecules they form. The objective of the remediation is to oxidize these molecules (to loose electrons) or to reduce them (to they gain electrons) so that they are transformed into CO2, water and any stable salt.
Aquifer where groundwater is stored in the intergranular porosity of sands and gravels.
Aquifer where groundwater is stored in the secondary porosity of the rock fractures.