1. Resourse recovery from acid mine drainage
Person(s) in charge : Finch, James
Description : Work has focused on metal recovery from the sludge generated in the current AMD treatment option (lime treatment). Two approaches are being explored. A. Selective extraction using amine complexing agents (e.g., diethylenetriamine, DETA) and subsequent electrowinning of the metal from the M-DETA complex to recycle the DETA. This was demonstrated for copper and is now being extended to nickel. B. Selective leaching with acid and precipitation using ozone. This process is with particular application to nickel.}
Partners :
Status of research :
Availability of results :
Concerned organizations :
2. Resource recovery from smelter residues
Person(s) in charge : Finch, James
Description : Smelter residues contain metals as sulphates, oxides and ferrites. Flotation processes are being extended to these materials. Selective flotation of lead sulphate in one case and nickel oxide in another using varieties of conventional reagents has been demonstrated.}
Partners :
Status of research :
Availability of results :
Concerned organizations :
3. Column flotation applied to de-inking recycled paper
Person(s) in charge : Finch, James
Description : Flotation using columns is shown to be quite straightforward, for one thing meaning that no special equipment is required (despite the variety of machines being promoted for this task). The remaining problems are mechanical: a reliable bubble generating system is needed (the common issue with columns); and a scale up procedure needs to be adopted. Both aspects are being researched.}
Partners :
Status of research :
Availability of results :
Concerned organizations : |
