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Treatment of Aluminum Plant Hazardous Wastes Containing Fluorides and PAH.

Bongo, Ghislain; Mercier, Guy; Chartier, Myriam; Dhenain, Aurélie; Blais, Jean-François (2009). Treatment of Aluminum Plant Hazardous Wastes Containing Fluorides and PAH. Journal of Environmental Engineering , vol. 135 , nº 3. p. 159-166. DOI: 10.1061/(ASCE)0733-9372(2009)135:3(159).

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Résumé

Aluminum industry wastes are solid residues contaminated with polycyclic aromatic hydrocarbons (PAHs) and fluorides. The aluminum industry waste used in this study contained 1,129mgkg-1 of benzo(b,j,k)fluoranthene. On application of toxicity characteristic leaching procedure (TCLP), a leachate containing 448mgL-1 of fluoride ions was obtained. The decontamination of aluminum industry wastes was carried out in cycles and included a stage of flotation, followed by stabilization and neutralization. The flotation treatment in the cell containing wastes contaminated with a concentration of 15% (wv-1) in the presence of surfactant cocamydopropyl hydroxysultaine (0.25% ww-1) allowed 47 to 83% removal of benzo(b,j,k) fluoranthene. The subsequent step of lime stabilization (8% wv-1) allowed production of nonhazardous wastes. The concentration of fluoride ions resulting from the TCLP test (67mgL-1) remained lower than the permissible level (150mgL-1).

Type de document: Article
Mots-clés libres: industrial wastes; fluoride; disasters and hazards; pollution; hazardous wastes; waste management; waste treatment plants; hydrocarbons
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 janv. 2021 15:23
Dernière modification: 08 janv. 2021 15:23
URI: http://espace.inrs.ca/id/eprint/10813

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