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The influence of electrodialytic remediation on dioxin (PCDD/PCDF) levels in fly ash and air pollution control residues.

https://arctichealth.org/en/permalink/ahliterature277176
Source
Chemosphere. 2016 Apr;148:380-7
Publication Type
Article
Date
Apr-2016
Author
Celia Dias-Ferreira
Gunvor M Kirkelund
Pernille E Jensen
Source
Chemosphere. 2016 Apr;148:380-7
Date
Apr-2016
Language
English
Publication Type
Article
Keywords
Air Pollution - analysis
Benzofurans - analysis
Coal Ash - analysis - chemistry
Construction Materials
Denmark
Electrochemical Techniques
Environmental Monitoring - methods
Environmental Restoration and Remediation - methods
Greenland
Incineration
Pilot Projects
Solid Waste - analysis
Tetrachlorodibenzodioxin - analogs & derivatives - analysis
Abstract
Fly ash and Air Pollution Control (APC) residues collected from three municipal solid waste incinerators in Denmark and Greenland were treated by electrodialytic remediation at pilot scale for 8-10 h. This work presents for the first time the effect of electrodialytic treatment on polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), and how these levels impact on the valorization options for fly ash and APC residue. PCDD/PCDF levels in the original residues ranged between 4.85 and 197 ng g(-1), being higher for the electrostatic precipitator fly ash. The toxic equivalent (TEQ) varied ten fold, ranging 0.18-2.0 ng g(-1) I-TEQ, with penta and hexa-homologs being most significant for toxicity. After the electrodialytic treatment PCDD/PCDF levels increased in the residues (between 1.4 and 2.0 times). This does not mean PCDD/PCDF were synthesized, but else that soluble materials dissolve, leaving behind the non-water soluble compounds, such as PCDD/PCDF. According to the Basel Convention, PCDD/PCDF levels in these materials is low (
PubMed ID
26826780 View in PubMed
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Screening of heavy metal containing waste types for use as raw material in Arctic clay-based bricks.

https://arctichealth.org/en/permalink/ahliterature297774
Source
Environ Sci Pollut Res Int. 2018 Nov; 25(33):32831-32843
Publication Type
Journal Article
Date
Nov-2018
Author
Louise Josefine Belmonte
Lisbeth M Ottosen
Gunvor Marie Kirkelund
Pernille Erland Jensen
Andreas Peter Vestbø
Author Affiliation
Arctic Technology Centre, DTU Civil Engineering, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.
Source
Environ Sci Pollut Res Int. 2018 Nov; 25(33):32831-32843
Date
Nov-2018
Language
English
Publication Type
Journal Article
Keywords
Clay - chemistry
Coal Ash - analysis - chemistry
Construction Materials - analysis
Greenland
Incineration
Metals, Heavy - analysis
Mining
Refuse Disposal - methods
Solid Waste - analysis
Water - chemistry
Abstract
In the vulnerable Arctic environment, the impact of especially hazardous wastes can have severe consequences and the reduction and safe handling of these waste types are therefore an important issue. In this study, two groups of heavy metal containing particulate waste materials, municipal solid waste incineration (MSWI) fly and bottom ashes and mine tailings (i.e., residues from the mineral resource industry) from Greenland were screened in order to determine their suitability as secondary resources in clay-based brick production. Small clay discs, containing 20 or 40% of the different particulate waste materials, were fired and material properties and heavy metal leaching tests were conducted before and after firing. Remediation techniques (washing in distilled water and electrodialytical treatment) applied to the fly ash reduced leaching before firing. The mine tailings and bottom ash brick discs obtained satisfactory densities (1669-2007 kg/m3) and open porosities (27.9-39.9%). In contrast, the fly ash brick discs had low densities (1313-1578 kg/m3) and high open porosities (42.1-51. %). However, leaching tests on crushed brick discs revealed that heavy metals generally became more available after firing for all the investigated materials and that further optimisation is therefore necessary prior to incorporation in bricks.
PubMed ID
27832436 View in PubMed
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