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Poster communications

COMPARISON OF HOT SOXHLET EXTRACTION, MICROWAVE ASSISTED EXTRACTION, SUPERCRITICAL FLUID EXTRACTION AND ACCELERATED SOLVENT EXTRACTION FOR THE DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS ADSORBED ON A REFRACTORY DIESEL PARTICULATE MATTER

Abstract : Several methods of extraction were optimized in order to extract Polycyclic Aromatic Hydrocarbons (PAHs), their nitrated derivatives as well as heavy n-alkanes from a particulate matter resulting from the combustion in a Diesel engine. Initially the conventional approach of extraction by Soxhlet was carried out. However the carbonaceous Diesel particulate matter appeared extremely refractory to extractions using the classical conditions of extraction generally developped for these pollutants. That led us to use a more effective approach: hot Soxhlet. Moreover, with an aim of increasing the extraction yields of the heaviest PAHs, other solvents such as aromatic or heteroaromatic ones were tested. Thereafter, three other techniques of extraction were evaluated and compared, namely: Microwave Assisted Extraction (MAE), Supercritical Fluid Extraction (SFE) and Accelerated Solvent Extraction (ASE). We optimized each one of these techniques by using experimental designs in order to understand the impact of each factor studied and their possible interactions on the recovery yields. However, under the conditions optimized with classical non aromatic solvents (methylene chloride, chloroform or tetrahydrofuran) and whatever technique used, we could only quantitatively extract the PAHs having from two to four aromatic rings and the heavy n-alkanes. It is in fact a mixture of pyridine and diethylamine that allowed the extraction of the heaviest and most difficult to extract PAHs from the Diesel soot, with yields exceeding 80 %. At last, the extraction of the nitrated PAHs was on the other hand improved by introducing a small proportion of acetic acid into pyridine.
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Poster communications
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02559561
Contributor : Florence Koltalo <>
Submitted on : Wednesday, May 6, 2020 - 12:02:07 PM
Last modification on : Monday, July 6, 2020 - 11:24:02 AM

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  • HAL Id : hal-02559561, version 1

Citation

F. Portet-Koltalo, K Oukebdane, F. Dionnet, P. Desbène. COMPARISON OF HOT SOXHLET EXTRACTION, MICROWAVE ASSISTED EXTRACTION, SUPERCRITICAL FLUID EXTRACTION AND ACCELERATED SOLVENT EXTRACTION FOR THE DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS ADSORBED ON A REFRACTORY DIESEL PARTICULATE MATTER. 31st international symposium on High Performance Liquid Phase Separations and related techniques, HPLC 2007, Jun 2007, Gand, Belgium. ⟨hal-02559561⟩

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