Geochemical and ecotoxicological assessment of iron- and steel-making slags for potential use in environmental applications

Laura A. Wendling, Monique T. Binet, Zheng Yuan, Francesca Gissi, Darren J. Koppel, Merrin S. Adams

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Prior to the productive use of iron- and steel-making slags as environmental amendments, a risk assessment supported by material characterization concomitant with leaching and ecotoxicological testing is necessary. Five iron- and steel-making slags were characterized geochemically, and the leachability of their elemental constituents was assessed. The toxicity of slag leachate to microalgae (Chlorella sp.), cladocerans (Ceriodaphnia dubia), and bacteria (Vibrio fischeri) was related to elemental composition. Slag leachates with the highest concentrations of dissolved elements were the most toxic (10% effective concentration [EC10] ∼1%), whereas those with the lowest concentrations of elements were the least toxic (EC10 63-85%). It was not possible to determine which elements caused the observed toxicity; however, comparisons with contaminant guidelines and published toxicity data identified several elements of potential environmental concern. Low to moderate activities were measured for radionuclides in the U and Th decay chains in slags. Based on these data, some of the slags examined herein are potentially suitable for use as environmental amendments following ≥10 times dilution to ameliorate potential toxic effects because of leachate pH.

Original languageEnglish
Pages (from-to)2602-2610
JournalEnvironmental Toxicology and Chemistry
Volume32
Issue number11
DOIs
Publication statusPublished - 1 Nov 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Poisons
Steel
slag
Slags
Iron
steel
iron
Aliivibrio fischeri
leachate
Microalgae
Toxicity
Chlorella
toxicity
Radioisotopes
Guidelines
Bacteria
Risk assessment
Leaching
Dilution
radionuclide

Keywords

  • Aquatic toxicity
  • By-product
  • Leachate
  • Metal
  • Radioactivity

Cite this

Wendling, Laura A. ; Binet, Monique T. ; Yuan, Zheng ; Gissi, Francesca ; Koppel, Darren J. ; Adams, Merrin S. / Geochemical and ecotoxicological assessment of iron- and steel-making slags for potential use in environmental applications. In: Environmental Toxicology and Chemistry. 2013 ; Vol. 32, No. 11. pp. 2602-2610.
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Geochemical and ecotoxicological assessment of iron- and steel-making slags for potential use in environmental applications. / Wendling, Laura A.; Binet, Monique T.; Yuan, Zheng; Gissi, Francesca; Koppel, Darren J.; Adams, Merrin S.

In: Environmental Toxicology and Chemistry, Vol. 32, No. 11, 01.11.2013, p. 2602-2610.

Research output: Contribution to journalArticleScientificpeer-review

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