Mercury Levels in Fly Ash and APC Residue from Municipal Solid Waste Incineration Before and After Electrodialytic Remediation

Mercury Levels in Fly Ash and APC Residue from Municipal Solid Waste Incineration Before and After Electrodialytic Remediation

Celia Dias-Ferreira Gunvor M. Kirkelund  Pernille E. Jensen 

Centro de Estudos de Recursos Naturais, Ambiente e Sociedade (CERNAS), Escola Superior Agrária, Instituto Politecnico de Coimbra, Bencanta, 3045-601 Coimbra, Portugal

Materials and Ceramic Engineering Department, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal

Department of Civil Engineering, Technical University of Denmark, 2800 Lyngby, Denmark

Page: 
672-682
|
DOI: 
https://doi.org/10.2495/SDP-V11-N5-672-682
Received: 
N/A
|
Accepted: 
N/A
|
Published: 
30 September 2016
| Citation

OPEN ACCESS

Abstract: 

Fly ash (FA) and Air Pollution Control (APC) residues collected from three municipal solid waste incinerators (MSWI) in Denmark and Greenland were treated by electrodialytic remediation at pilot scale for 8 to 10 h. The original residues and the treated material were analysed for mercury (Hg) in order to assess the influence of the electrodialytic treatment on the concentrations of this element. Mercury levels varied with the MSWI residue, ranging from 0.41 mg kg−1 in FA sample from electrostatic precipitator (ESP) to 8.38 mg kg−1 in MSWI residues from a semi-dry system with lime and activated carbon. Two distinct behaviours were observed for mercury as a result of the electrodialytic treatment. This element became enriched in the MSWI residues from the semi-dry system with activated carbon, whereas it decreased in ESP’s and cyclone’s FA. This work presents for the first time information about the effect of electrodialytic treatment on mercury levels and discusses the valorisation options for these MSWI residues.

Keywords: 

arctic, construction materials, EDR, electrodialytic remediation, Greenland, Hg, incineration, incinerators, MSW, MSWI, waste

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