Stabilization of electric arc furnace dust by the use of cementitious materials: Ionic competition and long-term leachability

Laforest, Guylaine; Duchesne, Josée

doi:10.1016/j.cemconres.2006.05.012

Cited by 19 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Identification of the chemical forms in the solid state of the retained metals was also carried out to gain understanding of the immobilization process of heavy metals in cement when polymeric additives were simultaneously present. The metals selected for this study were Pb(II), Cr(VI) and Zn(II), identified as priority metallic pollutants [13,23,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Encapsulation, solid-phases identification and leaching of toxic metals in cement systems modified by natural biodegradable polymers

Lasheras-Zubiate¹,

Navarro-Blasco²,

Fernández³

et al. 2012

Journal of Hazardous Materials

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Encapsulation, solid-phases identification and leaching of toxic metals in cement systems modified by natural biodegradable polymers

Lasheras-Zubiate¹,

Navarro-Blasco²,

Fernández³

et al. 2012

Journal of Hazardous Materials

View full text Add to dashboard Cite

show abstract

“…The selected metals were Pb(II), Cr(VI) and Zn(II), as they have been identified as priority metallic pollutants and they have been shown to have an influence on the fresh-state properties of cement-based mortars [5,[7][8][9]. The polymer's ability to chelate heavy metals as a way of removing them from waste waters and subsequently retaining them in cement mortars was also studied.…”

Section: Introductionmentioning

confidence: 99%

Interaction of carboxymethylchitosan and heavy metals in cement media

Lasheras-Zubiate

Navarro-Blasco

Álvarez

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

The performance of an etherified chitosan, carboxymethyl chitosan (CMCH), when added to cement mortars doped with heavy metals, was assessed. In the presence of heavy metals (Cr, Pb, Zn) strong modifications of the fresh-state properties were evaluated. The addition of the polymer was seen to be useful in minimising some of these modifications, as those related to the setting time. A competitive mechanism for adsorption between the oxoanionic form of the metals and the carboxylate groups of the chitosan derivative was established. Studies on the metal chelating ability of the polymer and leaching from the hardened specimens showed scarce complexation under alkaline conditions, pointing to physical entrapment based on metal adsorption. However, significant chelation of metals was proved at near-neutral pH, suggesting the potential usefulness of the polymer as a agent for removing heavy metals from polluted waters and subsequently immobilizing them in cement mortars. Leaching tests carried out on polymer-metal complex-bearing samples showed a significant reduction in the amount of released Pb and Zn.

show abstract

“…Various applications for the EAFD are been suggested such as the study of its vitrification product [8], the recovery of zinc and iron [9][10][11][12][13][14][15][16], soil fertilization [17], recycling to the EAF [18][19][20][21], incorporation in cement [22,23] and incorporation in glass [24]. 0304 According to a recent study [25] the EAFD formation takes place in two steps: first, the emission of dust "precursors" (vapors, metal droplets, and solid particles) inside the furnace; second, the conversion of those precursors into dust by agglomeration and physico-chemical transformations.…”

Section: Introductionmentioning

confidence: 99%