Procedure of elimination of hydrophobic organic pollutants from contaminated soil using a vegetable oil (Machine-translation by Google Translate, not legally binding)

Procedure of elimination of hydrophobic organic pollutants from contaminated soils using a vegetable oil. The contaminated soil is excavated and subjected to a pretreatment to homogenize the particle size before carrying out the extraction of the contaminants by a vegetable oil. After the extraction...

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Hauptverfasser: ARCA RAMOS, ADRIANA, EIBES GONZALEZ, GEMMA, MOREIRA VILAR, MARIA TERESA, LEMA RODICIO, JUAN MANUEL, FEIJOO COSTA, GUMERSINDO
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:Procedure of elimination of hydrophobic organic pollutants from contaminated soils using a vegetable oil. The contaminated soil is excavated and subjected to a pretreatment to homogenize the particle size before carrying out the extraction of the contaminants by a vegetable oil. After the extraction stage, the soil and vegetable oil are separated by centrifugation and the oil, with a high concentration of hydrophobic organic pollutants, is introduced in a biphasic enzyme reactor, in which an aqueous phase containing the enzyme is added, of the type oxidase or peroxidase and the necessary cofactors to complete the catalytic cycle of the enzyme used. In this biphasic reactor the elimination of the contaminants present in the oil takes place by enzymatic oxidation. At the end of the treatment, the separation of the aqueous phase and the vegetable oil takes place. The vegetable oil free of the hydrophobic organic pollutants is used to carry out a new extraction of contaminated soil. The aqueous phase is returned to the reactor to be reused in an enzymatic oxidation process to regenerate a new batch of contaminated vegetable oil. The treated soil is returned to its original location according to the best available techniques. (Machine-translation by Google Translate, not legally binding) Procedimiento de eliminación de contaminantes orgánicos hidrofóbicos de suelos contaminados usando un aceite vegetal. El suelo contaminado se excava y somete a un pretratamiento para homogeneizar el tamaño de partícula antes de llevar a cabo la extracción de los contaminantes por un aceite vegetal. Tras la etapa de extracción, el suelo y el aceite vegetal se separan por centrifugación y el aceite, con alta concentración de contaminantes orgánicos hidrofóbicos se introduce en un reactor enzimático bifásico, en el cual se añade una fase acuosa que contiene la enzima, del tipo oxidasa o peroxidasa y los cofactores necesarios para completar el ciclo catalítico de la enzima utilizada. En este reactor bifásico se produce la eliminación de los contaminantes presentes en el aceite mediante oxidación enzimática. Al terminar el tratamiento se lleva a cabo la separación de la fase acuosa y del aceite vegetal. El aceite vegetal libre de los contaminantes orgánicos hidrofóbicos se emplea para llevar a cabo una nueva extracción de suelo contaminado. La fase acuosa se retorna al reactor para ser reutilizada en un proceso de oxidación enzimática para regenerar un nuevo lote de aceite vegetal c