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Remediation of Contaminated Dredged Sediments Using Physical Separation Techniques.

Palakkeel Veetil, Dileep; Mercier, Guy; Blais, Jean-François; Chartier, Myriam; Tran, Lan Huong; Taillard, Vincent (2014). Remediation of Contaminated Dredged Sediments Using Physical Separation Techniques. Soil and Sediment Contamination , vol. 23 , nº 8. p. 932-953. DOI: 10.1080/15320383.2014.896860.

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Résumé

Physical separation processes constitute a cost-effective approach to remediate contaminated sediments. A laboratory-scale physical separation process using froth flotation, Wilfley table (WT), and physical separation column (PSC) as the key unit operations was studied using Sandy Beach sediments (Gaspé, Canada) contaminated with metals, mainly copper (Cu), and polycyclic aromatic hydrocarbons (PAHs). Copper was distributed (89-96%) mainly in the fractions <250 μm, whereas PAHs were mainly in the sand, coarse particles, and gravel. Froth flotation was found to be effective for separating both Cu and PAHs simultaneously from fractions < 250 μm. WT (0.25-2 mm) and PSC (> 2 mm) were more effective for PAH removal than Cu removal. Overall, the treatment process resulted in a cleaned sediment recovery of 74-75% (w/w) with the following pollutants removed: 71-80% PAHs, 61-65% Cu, 27-33% Zn, and 36-40% Pb.

Type de document: Article
Mots-clés libres: copper; flotation; physical separation; polycyclic aromatic hydrocarbon; sediment; Wilfley table
Centre: Centre Eau Terre Environnement
Date de dépôt: 11 avr. 2018 14:41
Dernière modification: 11 avr. 2018 14:41
URI: http://espace.inrs.ca/id/eprint/3653

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