PAH removal from black sludge from aluminium industry by flotation using non-ionic surfactants

The valorization of black sludge is an environmental problem of the aluminium industry because of Polycyclic Aromatic Hydrocarbon (PAH), fluoride and alumina contents. A soil washing operated in a cell flotation with non-ionic surfactants (Brij 35, Igepal CA-720, Triton X-100, Tween 80) at different...

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Veröffentlicht in:Environmental technology. - 1998. - 27(2006), 9 vom: 14. Sept., Seite 1019-30
1. Verfasser: Dhenain, A (VerfasserIn)
Weitere Verfasser: Mercier, G, Blais, J F, Bergeron, M
Format: Aufsatz
Sprache:French
Veröffentlicht: 2006
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Industrial Waste Polycyclic Aromatic Hydrocarbons Sewage Surface-Active Agents Aluminum CPD4NFA903
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245 1 0 |a PAH removal from black sludge from aluminium industry by flotation using non-ionic surfactants 
246 3 3 |a Enlèvement des hap des boues noires d'aluminerie par flottation et en présence de surfactants non ioniques 
264 1 |c 2006 
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520 |a The valorization of black sludge is an environmental problem of the aluminium industry because of Polycyclic Aromatic Hydrocarbon (PAH), fluoride and alumina contents. A soil washing operated in a cell flotation with non-ionic surfactants (Brij 35, Igepal CA-720, Triton X-100, Tween 80) at different concentrations has been tested in order to remove the PAH (benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(j)fluoranthene, benzo(k)fluoranthene, fluoranthene) detected in black sludge. The Tween 80 at 0.5% gave the best results with PAH removal rates between 35 and 50%. These percentages remain low due to the presence in large quantity of fine solid particles (45%) in the PAH concentrate produced by the flotation process. The substitution of the cell flotation by a column flotation allowed the reduction of this problem. Thus, the PAH removal rates reached 60%. This removal yield has been obtained with the lowest wash water flow-rate (150 ml min(-1)) and pulp total solids (10% p p(-1)) tested 
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650 7 |a Polycyclic Aromatic Hydrocarbons  |2 NLM 
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650 7 |a CPD4NFA903  |2 NLM 
700 1 |a Mercier, G  |e verfasserin  |4 aut 
700 1 |a Blais, J F  |e verfasserin  |4 aut 
700 1 |a Bergeron, M  |e verfasserin  |4 aut 
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