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Size-separated particle fractions of stainless steel welding fume particles – A multi-analytical characterization focusing on surface oxide speciation and release of hexavalent chromium
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
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2018 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 342, p. 527-535Article in journal (Refereed) Published
Abstract [en]

Welding fume of stainless steels is potentially health hazardous. The aim of this study was to investigate the manganese (Mn) and chromium (Cr) speciation of welding fume particles and their extent of metal release relevant for an inhalation scenario, as a function of particle size, welding method (manual metal arc welding, metal arc welding using an active shielding gas), different electrodes (solid wires and flux-cored wires) and shielding gases, and base alloy (austenitic AISI 304L and duplex stainless steel LDX2101). Metal release investigations were performed in phosphate buffered saline (PBS), pH 7.3, 37°, 24 h. The particles were characterized by means of microscopic, spectroscopic, and electroanalytical methods. Cr was predominantly released from particles of the welding fume when exposed in PBS [3–96% of the total amount of Cr, of which up to 70% as Cr(VI)], followed by Mn, nickel, and iron. Duplex stainless steel welded with a flux-cored wire generated a welding fume that released most Cr(VI). Nano-sized particles released a significantly higher amount of nickel compared with micron-sized particle fractions. The welding fume did not contain any solitary known chromate compounds, but multi-elemental highly oxidized oxide(s) (iron, Cr, and Mn, possibly bismuth and silicon). 

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 342, p. 527-535
Keywords [en]
Chromium(VI), Flux-cored wire, Manganese, Nickel, Welding
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-216800DOI: 10.1016/j.jhazmat.2017.08.070ISI: 000414880800057PubMedID: 28886565Scopus ID: 2-s2.0-85028707249OAI: oai:DiVA.org:kth-216800DiVA, id: diva2:1156881
Funder
VINNOVA, 2017-02519
Note

QC 20171205

Available from: 2017-11-14 Created: 2017-11-14 Last updated: 2024-03-15Bibliographically approved
In thesis
1. Transformation/dissolution characteristics of cobalt and welding fume nanoparticles in physiological and environmental media: surface interactions and trophic transfer
Open this publication in new window or tab >>Transformation/dissolution characteristics of cobalt and welding fume nanoparticles in physiological and environmental media: surface interactions and trophic transfer
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Nanoparticles (NPs) and nanomaterials (NMs) are present everywhere in the environment. They can form both as an act of nature and during human activities. Various kinds of NPs and NMs are engineered for different applications in the ongoing development of nanoscience and technology. Nowadays, concerns have emerged related to potential adverse effects of NPs on human health and the environment. Knowledge related to effects induced by more reactive metal NPs is scarce or even missing in some cases. Such information is crucial for risk assessments. The focus of this doctoral thesis has therefore mainly been placed on reactive metal NPs: stainless steel welding fume particles, cobalt (Co) NPs, and solution combustion synthesized (SCS) Co NPs, to investigate their transformation/dissolution characteristics in environmental and biological media.Environmental interaction studies were performed in terms of adsorption of biomolecules and natural organic matter (NOM) onto the surfaces of the NPs and their influence on dissolution, agglomeration, and size of the NPs in solution. Trophic transfer of Co NPs was investigated in an aquatic food web.The Co NPs rapidly agglomerated and sedimented in solution. Co ions were released from the NPs in both phosphate buffer solution and in freshwater, dissolution processes that were influenced by the adsorption of biomolecules and NOM. The trophic transfer of Co in the aquatic food web was shown to be affected by the extent of both agglomeration and sedimentation. No biomagnification was observed during the trophic transfer, and the addition of excreted biomolecules had no effect on the transfer.The dissolution of stainless steel welding fume particles was studied in PBS. The metal release data could help estimate the risk assessment of stainless steel welding fume particles.

Abstract [sv]

Nanopartiklar (NP) och nanomaterial finns överallt i vår omgivning. De produceras genom både naturliga och mänskliga aktiviteter. Olika typer av NP används inom tillämpningar såsom kosmetika och läkemedel. Det saknas dock fortfarande kunskaper om effekten av reaktiva metalliska NP på människors hälsa och miljö. Därför fokuserar denna doktorsavhandling på reaktiva metallnanopartiklars beteende i miljö- och biologiska media, till exempel svetspartiklar från rostfritt stål, koboltnanopartiklar och kobolt som producerats genom lösningsförbränning.Adsorptionen av biomolekyler och naturligt organisk material i både fosfatbuffert, saltlösning och ytvatten studerades och dess påverkan på agglomerering och storlek. Dessutom undersöktes trofisk överföringen av koboltnanopartiklar i en akvatisk näringskedja besående av alger, zooplankton och fisk. Vidare studerades hur adsorption av utsöndrade biomolekyler från zooplanktion påverkade överföringen i näringskedjan.De studerade reaktiva metallnanopartiklarna agglomererade och sedimenterade snabbt i lösning. Metalljoner frisattes från NP i både fosfatbuffertlösning och ytvatten. Adsorptionen av biomolekyler och naturligt organiskt material påverkade upplösningen av metallnanopartiklarna. Överföringen av koboltnanopartiklarna i den akvatiska näringskedjan påverkades av agglomerering och sedimentation av NP, och det var ingen bioackumulering under den trofiska överföringen. Tillsatsen av utsöndrade biomolekyler påverkade inte den trofiska överföringen av koboltnanopartiklar.Svetsrökpartiklar från rostfritt stål studerades med avseende på upplösning i PBS (simulerad lungvätska). Studien kan hjälpa till att uppskatta risken av svetsrökpartiklar från rostfritt stål genom att observera frisättningen av Cr(VI) från partiklarna.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2020. p. 73
Series
TRITA-CBH-FOU ; 2020:37
Keywords
nanoparticles, cobalt, stainless steel welding fume particles, biomolecules, metal release, trophic transfer, adsorption, agglomeration, algae, nanopartiklar, kobolt, rostfritt stål svetsrök partiklar, biomolekyler, metallfrigöring, trofisk överföring, adsorption, agglomerering, alger
National Category
Engineering and Technology
Research subject
Chemistry
Identifiers
urn:nbn:se:kth:diva-280163 (URN)978-91-7873-623-2 (ISBN)
Public defence
2020-09-25, https://kth-se.zoom.us/webinar/register/WN_uIzHkMlNTZOEoSxfBn3-kA, 14:00 (English)
Opponent
Supervisors
Note

QC 2020-09-04

Available from: 2020-09-04 Created: 2020-09-04 Last updated: 2022-06-25Bibliographically approved

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Mei, NanxuanCha, YingyingOlofsson, UlfOdnevall Wallinder, IngerHedberg, Yolanda

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Mei, NanxuanBelleville, L.Cha, YingyingOlofsson, UlfOdnevall Wallinder, IngerHedberg, Yolanda
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