Digitala Vetenskapliga Arkivet

Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Physico-chemical characteristics of fine fraction materials from an old crystal glass dumpsite in Sweden
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Environmental Science and Engineering Group)ORCID iD: 0000-0002-9012-1847
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Rio de Janeiro State University, Brazil. (Environmental Science and Engineering Group)ORCID iD: 0000-0002-7920-8001
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Environmental Science and Engineering Group)ORCID iD: 0000-0001-8906-9271
Estonian University of Life Sciences, Estonia.
Show others and affiliations
2019 (English)In: Chemistry in ecology, ISSN 0275-7540, E-ISSN 1029-0370, Vol. 35, no 8, p. 877-890Article in journal (Refereed) Published
Abstract [en]

Physico-chemical characteristics of waste, particularly fine fraction (FF), from an old crystal glass waste dump in Sweden were studied to assess recycling or disposal alternatives. Hand-sorting of the waste indicated glass content of 44.1% while sieving established the FF as a more soil-like mix of glass and other materials constituting 33.3% of all excavated waste. The FF was around neutral pH with 24.4% moisture content, low values of Total Dissolved Solids, Dissolved Organic Carbon and fluorides, but hazardous concentrations of As, Cd, Pb and Zn according to the Swedish Environmental Protection Agency guidelines. While the FF leached metals in low concentrations at neutral pH, it leached considerably during digestion with nitric acid, implying leaching risks at low pH. Thus, the waste requires safe storage in hazardous waste class ‘bank account’ storage cells to avoid environmental contamination as metal recovery and other recycling strategies for the glass waste are being developed. The study could fill the information gap regarding preservation of potential resources in the on-going, fast-paced excavation and re-landfilling of heavy metal contaminated materials in the region.

Place, publisher, year, edition, pages
Taylor & Francis, 2019. Vol. 35, no 8, p. 877-890
Keywords [en]
Waste characterisation, physico-chemical characteristics, glass waste, fine fraction, heavy metals, circular economy
National Category
Environmental Sciences
Research subject
Environmental Science, Environmental technology
Identifiers
URN: urn:nbn:se:lnu:diva-87086DOI: 10.1080/02757540.2019.1648442ISI: 000479933500001OAI: oai:DiVA.org:lnu-87086DiVA, id: diva2:1340297
Funder
Vinnova, 2016-05279Available from: 2019-08-04 Created: 2019-08-04 Last updated: 2020-05-05Bibliographically approved
In thesis
1. Landfill mining approach for resource recovery from glass dumps into the circular economy
Open this publication in new window or tab >>Landfill mining approach for resource recovery from glass dumps into the circular economy
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Landfills and open dumps have been the most cost-effective waste disposal option, resulting in over 500,000 landfills and dumps in the EU alone. They pose significant environmental and health threats due to emission of toxic gases and release of persistent contaminants to soil and groundwater, triggering a considerable global economic impact annually. Contrariwise, since they have been the ultimate end-of-life sink for materials over time, dumpsites are potential secondary resource reservoirs whose recovery could offset their impacts. However, resource recovery is impeded by the heterogeneous nature and contamination of the wastes, and thus uncertainty about availability and efficiency of recovery techniques. This thesis, therefore, proposes techniques that could improve excavated material quality and enhance their recovery as potential secondary resources for the circular economy.

Waste from glass dumps in south-eastern Sweden was characterised to evaluate safe handling, pre-recycling storage requirements, and suitability for resource recovery or disposal. The dumps were mapped with Electrical Resistivity Tomography (ERT) before excavation to detect glass locations and enhance recovery. Furthermore, metal extraction from the recovered glass was assessed using a combination of mechanical activation of the glass and leaching with acids and biodegradable chelating agents. The waste required safe pre-recycling storage in hazardous waste class ‘bank account’ cells due to hazardous concentrations of leachable As, Cd, Pb, Sb and Zn. The waste obtained was also highly heterogeneous, although its recycling could not pose any radiological risks. However, application of ERT as a pre-excavation tool improved excavated material composition and secured a more homogeneous, recyclable fraction (>87% glass). Subsequently, leaching of the homogeneous glass fraction achieved Pb extraction efficiency of 78%, 64% and 42% for HNO3, EDDS and NTA respectively, at low leachant concentrations. The extraction was enhanced by the mechanical activation step, as comparison between activated and inactivated samples showed a 1200% difference in extraction.

The findings in this thesis highlight dumped waste as a resource whose recovery requires integrating the landfill mining approach with techniques that enhance material quality and extraction efficiency to ensure a resource-secure circular economy and decontaminated ecosystems.

Abstract [sv]

Deponier och öppna soptippar har varit det mest kostnadseffektiva alternativet för avfallshantering, vilket resulterade i över 500 000 deponier och soptippar bara inom EU. Dessa utgör stora miljö- och hälsorisker på grund av utsläpp av giftiga gaser och frigör föroreningar till mark och grundvatten, vilket årligen skapar betydande, globala ekonomiska konsekvenser. Eftersom de har varit det ultimata slutet för material över tid, så är deponier och soptippar potentiella, sekundära resursbehållare vars återvinning kan kompensera deras negativa effekter. Resursåtervinning hindras emellertid av den heterogena naturen hos, och förekommande föroreningar i, avfallet, vilket därmed skapar osäkerhet om återhämtnings-teknikernas tillgänglighet och effektivitet. Föreliggande avhandling föreslår därför tekniker som kan förbättra de utgrävda materialens kvalitet och förbättra deras återvinning som potentiella, sekundära resurser i den cirkulära ekonomin.

Avfall från glas-deponier i sydöstra Sverige karakteriserades för att utvärdera säker hantering, uppfylla lagringskrav för återvinning och lämplighet för resursåtervinning eller bortskaffande. Deponierna kartlades före utgrävningen med Electrical Resistivity Tomography (ERT) för att identifiera platser med homogena glasfraktioner och förbättra återvinningen. Vidare utvärderades metallexstraktion från det utvunna glaset med användning av en kombination av mekanisk aktivering av glaset och urlakning med syror och biologiskt nedbrytbara kelatbildare. Avfallet krävde säker återvinnings-lagring i ”bankkonto-celler" för farligt avfall på grund av farliga koncentrationer av lakningsbara ämnen såsom As, Cd, Pb, Sb och Zn. Det erhållna avfallet var mycket heterogent, men återvinning kunde ändå inte påvisa några radiologiska risker. Användningen av ERT som ett identifikationsverktyg förbättrade emellertid den utgrävda materialkompositionen och säkerställde en mer homogen, återvinningsbar fraktion (>87% glas). Därefter uppnåddes urlakning av den homogena glasfraktionen en Pb-extraktionseffektivitet på 78%, 64% och 42% för HNO3, EDDS respektive NTA, vid låg lakningsmedel-koncentration. Extraktionen förbättrades genom det mekaniska aktiveringssteget, eftersom jämförelse mellan aktiverade och inaktiverade prover uppvisade en skillnad på 1200% i extraktion.

Resultaten i denna avhandling belyser deponerat avfall som en resurs vars återvinning kräver att integrera landfill mining-metoder med tekniker som förbättrar materialkvaliteten och utvinningseffektiviteten för att säkerställa en resurs-säker cirkulär ekonomi och dekontaminerade ekosystem.

Place, publisher, year, edition, pages
Växjö: Linnaeus University Press, 2020. p. 70
Series
Linnaeus University Dissertations ; 381/2020
Keywords
Resource recovery, landfill mining, hazardous waste, hydrometallurgical extraction, geophysical mapping, circular economy, Återvinning av resurser, gruvdrift, farligt avfall, hydrometallurgisk utvinning, geofysisk kartläggning, cirkulär ekonomi
National Category
Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
urn:nbn:se:lnu:diva-93643 (URN)978-91-89081-50-5 (ISBN)978-91-89081-51-2 (ISBN)
Public defence
2020-05-08, Fullriggaren (MA 135), Landgången 3, 392 31, Kalmar, 09:00 (English)
Opponent
Supervisors
Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2020-05-05Bibliographically approved

Open Access in DiVA

fulltext(1688 kB)115 downloads
File information
File name FULLTEXT01.pdfFile size 1688 kBChecksum SHA-512
b44bf6daecb57fd7f72706e2922f80ebd3a1f64f2e1dff1aa56cbf91ef5aa68c26a7209ddd308e8654a134b6546935e313b6f25036d3ce096240e8cdecc23325
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Mutafela, RichardMarques, MarciaJani, YahyaHogland, William
By organisation
Department of Biology and Environmental Science
In the same journal
Chemistry in ecology
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 115 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 166 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf