| Titre : | Remediation of soils contaminated with total petroleum hydrocarbons and polycyclic aromatic hydrocarbons : extraction with supercritical ethane (2010) |
| Auteurs : | Marco Antonio Ávila-Chávez, Auteur ; Arturo Trejo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 7, Avril 2010) |
| Article en page(s) : | pp. 3342–3348 |
| Note générale : | Industrial Chemistry |
| Langues : | Anglais |
| Tags : | Soils Contaminated Remediation Petroleum Hydrocarbons Polycyclic Aromatic Supercritical Ethane |
| Résumé : | In this work two natural certified soils were extracted with supercritical ethane. One sample was polluted with total petroleum hydrocarbons (THP−soil) and the second one with polycyclic aromatic hydrocarbons (PAH−soil). The extraction studies were carried out using a high-pressure experimental device constructed in our laboratory. The extraction conditions for the TPH−soil were 27.1 MPa and 308.15 K, whereas those for the PAH−soil were 23.7 MPa and 308.15 K. Four independent extractions were performed on each test soil varying the volume of solvent: 10, 20, 30, and 40 L. Infrared spectroscopy was used to quantify the hydrocarbons in the residues after supercritical extraction of the TPH−soil, whereas high-performance liquid chromatography was employed, with a photodiode array detector and a fluorescence detector, to analyze seven polycyclic aromatic hydrocarbons (PAHs) in the residues after supercritical extraction of the PAH−soil. The extraction results show that there is a reduction of hydrocarbons of 76% using 10 L of ethane while the reduction is 90% using 40 L of ethane for the TPH−soil sample. For the sample of PAH−soil there is a reduction greater than 80% for the concentration of six of the seven PAHs studied. Naphthalene behaves as a refractory compound; hence, it presents the lowest reduction in concentration. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie901502c |
