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Pregled bibliografske jedinice broj: 253373

Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction


Oreščanin, Višnja; Mikelić, Luka; Sofilić, Tahir; Rastovčan-Mioč, Alenka; Užarević, Krunoslav; Medunić, Gordana; Elez, Loris; Lulić, Stipe
Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction // Journal of Environmental Science & Health. Part A, 42 (2007), 3; 323-329 (međunarodna recenzija, članak, znanstveni)


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Naslov
Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction

Autori
Oreščanin, Višnja ; Mikelić, Luka ; Sofilić, Tahir ; Rastovčan-Mioč, Alenka ; Užarević, Krunoslav ; Medunić, Gordana ; Elez, Loris ; Lulić, Stipe

Izvornik
Journal of Environmental Science & Health. Part A (1093-4529) 42 (2007), 3; 323-329

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
electric arc furnace dust; heavy metals; leaching; alkaline digestion; zinc recovery; chromate reduction

Sažetak
This study was carried out to determine the appropriate treatment of electric arc furnace (EAF) dust prior to permanent disposal. The total heavy metal content as well as heavy metal leaching from EAF dust was investigated in five composite samples obtained from three Croatian and Slovenian steelworks. In order to recover zinc and reduce its leaching from the dust, all five samples were submitted to alkaline extraction with 10 M NaOH. Reduction of Cr (VI) to Cr(III) was conducted using FeSO4• 7H_2O solution. The elements Mn, Fe, Cu, Ni, and notably Zn and Pb, exhibited highest mobility during toxicity characteristic leaching procedure (TCLP). Comparing to TCLP extracts of initial EAF dust, zinc was found to be over 15 times lower and lead over 200 times lower in TCLP extracts of EAF dust processed by the alkaline leaching method. Since Cr (VI) exceeded its permissible level in the DIN 38414-S4 extracts of both initial and alkaline digested dust, its reduction to Cr (III) prior to permanent disposal is necessary. The recovery of zinc from EAF dust treated with alkaline agent ranged from 50.3% to 73.2%. According to phase analysis, recovery yield showed dependence on zincite/franklinite ratio. The results of the study indicate that permanent disposal of EAF dust require the following procedure: alkaline digestion (followed by leachate purification and alkaline zinc electrolyses), chromate reduction (if necessary), solidification of leaching residue and its testing using the leaching analyses.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija



POVEZANOST RADA


Projekt / tema
098-0982934-2713 - Radionuklidi i elementi u tragovima u okolišnim sustavima (Delko Barišić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Citiraj ovu publikaciju

Oreščanin, Višnja; Mikelić, Luka; Sofilić, Tahir; Rastovčan-Mioč, Alenka; Užarević, Krunoslav; Medunić, Gordana; Elez, Loris; Lulić, Stipe
Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction // Journal of Environmental Science & Health. Part A, 42 (2007), 3; 323-329 (međunarodna recenzija, članak, znanstveni)
Oreščanin, V., Mikelić, L., Sofilić, T., Rastovčan-Mioč, A., Užarević, K., Medunić, G., Elez, L. & Lulić, S. (2007) Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction. Journal of Environmental Science & Health. Part A, 42 (3), 323-329.
@article{article, year = {2007}, pages = {323-329}, keywords = {electric arc furnace dust, heavy metals, leaching, alkaline digestion, zinc recovery, chromate reduction}, journal = {Journal of Environmental Science and Health. Part A}, volume = {42}, number = {3}, issn = {1093-4529}, title = {Leaching Properties of Electric Arc Furnace Dust Prior/Following Alkaline Extraction}, keyword = {electric arc furnace dust, heavy metals, leaching, alkaline digestion, zinc recovery, chromate reduction} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE