Improvement of a three-step process for the treatment of aluminium hazardous wastes containing PAHs (benzo[b,j,k]fluoranthene and chrysene) and fluoride.

Hazardous wastes from a primary aluminium production plant could be decontaminated by a three-step process. First, the PAHs contained in these wastes were extracted with an amphoteric surfactant (0.25% or 0.

Combined column and cell flotation process for the treatment of PAH contaminated hazardous wastes produced by an aluminium production plant.

The aluminium electrolytic plants generate PAH and fluoride contaminated wastes which are usually classified as hazardous material. These residues are generally disposed in secure landfill sites. A flotation cell process was previously developed to remove PAH from these aluminium industry wastes.