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Polycyclic Aromatic Hydrocarbon Oxidation from Concentrates Issued from an Attrition Process of Polluted Soil Using the Fenton Reagent and Permanganate.

Bendouz, Malika; Dionne, Justine; Tran, Lan Huong; Coudert, Lucie; Mercier, Guy; Blais, Jean-François (2017). Polycyclic Aromatic Hydrocarbon Oxidation from Concentrates Issued from an Attrition Process of Polluted Soil Using the Fenton Reagent and Permanganate. Water, Air, & Soil Pollution , vol. 228 , nº 3. p. 115. DOI: 10.1007/s11270-017-3292-x.

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Résumé

This study was conducted to determine the optimal conditions for PAH degradation from highly contaminated attrition sludge (PAC) using a Fenton process or successive permanganate (KMnO₄) oxidation and Fenton processes. The following parameters were studied to optimize the Fenton oxidation process: the amounts of reactants based on the stoichiometric oxidant demand (SOD), the reactant addition protocol and number of doses, and the solid/liquid ratio (S/L). The results showed that the following conditions were optimum: TS = 30%, 7.5 times SOD, H₂O₂/Fe²⁺ ratio = 10, and added five times during 60 min, which allowed the degradation of 43% of total 27 PAHs from the PAC. Successive Fenton and KMnO₄ oxidation processes were also tested. PAH degradation using a sequential Fenton process followed by KMnO₄ oxidation (or KMnO₄ followed by Fenton) was higher than for the use of Fenton or KMnO₄ treatment alone. Up to 71% of the total 27 PAHs were degraded when using a combination of both processes. It appeared that the sequential treatment is a viable method for the significant degradation of 27 PAHs from PAC (t value > 2.77).

Type de document: Article
Mots-clés libres: polycyclic aromatic hydrocarbons (PAHs); fenton; permanganate oxidation; attrition sludge; degradation
Centre: Centre Eau Terre Environnement
Date de dépôt: 07 mai 2018 20:33
Dernière modification: 09 mai 2018 19:08
URI: http://espace.inrs.ca/id/eprint/6453

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