Resource recovery from municipal solid waste ash
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2014

Ashes from municipal solid waste incineration (MSWI) may be a cumbersome waste to handle. Some ash fractions contain organic pollutants, such as dioxins, as well as heavy metals. Additionally, some of the metals have a high value and are considered as critical to the industry. Recovery of e.g. copper and zinc from MSWI ashes will not only recover valuable metals that would otherwise be land filled, but also reduce the toxicity of the ash and thereby make it less cumbersome to handle. Such processes are presently being investigated by the Industrial Materials Recycling group at Chalmers University of Technology. The processes are primarily based on acid leaching of the ash combined with selective solvent extraction. The work on recovery process development is supported by investigations of the chemical speciation of metals, i.e. identification of metal compounds, in ashes by, e.g. synchrotron based X-ray absorption spectroscopy (XAS). The presentation will give an introduction to the validation of an optimized leaching process for MSWI and speciation results for Cu and Zn, as well as discuss the promising results that have been obtained using the suggested recovery processes for these metals.

zinc compounds

MSWI fly ash

X-ray absorption spectroscopy

acidic leaching

metal speciation

copper compounds

Författare

Jinfeng Tang

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Henric Lassesson

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Britt-Marie Steenari

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Proceedings of the 29th International Conference on Solid Waste Technology and Management, Philadelphia, PA U.S.A., March 30-April 2, 2014

1091-8043 (ISSN)

352-361

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Kemiteknik