Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1007/s10163-022-01476-9
Licence creative commons licence
Title (Primary) Thiourea leaching of gold from processed municipal solid waste incineration residues
Author Abramov, S.M.; He, J.; Wimmer, D.; Muehe, E.M.; Helle, T.; Thorwarth, H.; Kappler, A.
Source Titel Journal of Material Cycles and Waste Management
Year 2022
Department UMB
Volume 24
Issue 6
Page From 2243
Page To 2254
Language englisch
Topic T7 Bioeconomy
Keywords Gold; Leaching; Thiourea; Municipal solid waste incineration residue
Abstract Incineration is one of the key technologies in disposal of municipal waste, which produces municipal solid waste incineration (MSWI) residues with high valuable metal contents. The recycling strategy for the MSWI residues is typically focused on the recovery of scrap metals yielding processed municipal solid waste incineration residues (PIR) as the main byproduct. However, the PIR still contains valuable metals, particularly gold, which cannot be extracted by conventional methods. Here, we evaluated the feasibility of using the 0.5-2.0 mm grain size fraction of PIR containing 28.82 +/- 1.62 mg/kg of gold as raw material for a two-stage extraction process. In the first stage the alkalic fine-grained PIR was acidified with a solution of 20% (v/v) of HCl-containing flue gas cleaning liquid that is obtained by the municipal waste incineration plant itself as a waste product. In the second stage we leached the acidified fine-grained PIR by thiourea with Fe3+ as an oxidant. Application of the thiourea-Fe3+ leaching system resulted in recovery of 16.4 +/- 1.56 mg/kg of gold from the fine-grained PIR within 6 h of incubation. Due to high gold market prices, upscaling of the suggested technology can represent a suitable strategy for gold recovery from PIR and other MSWI residues.
Persistent UFZ Identifier
Abramov, S.M., He, J., Wimmer, D., Muehe, E.M., Helle, T., Thorwarth, H., Kappler, A. (2022):
Thiourea leaching of gold from processed municipal solid waste incineration residues
J. Mater. Cycles Waste Manag. 24 (6), 2243 - 2254 10.1007/s10163-022-01476-9