Solidification/stabilisation of electric arc furnace waste using low grade MgO

Cubukcuoglu, Beste; Ouki, Sabeha K.

doi:10.1016/j.chemosphere.2011.11.007

Cited by 36 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Soluble phosphates are the mostly commonly tested additives. In addition, lime or quicklime (Dash and Hussain 2012;Kogbara and AlTabbaa 2011;Williford et al 2007), hydroxyapatite (HA) (Ma et al 1994;Mavropoulos et al 2002;Seaman et al 2001), carbonates (Conner and Hoeffner 1998), and caustic magnesia (Cubukcuoglu and Ouki 2012;Rötting et al 2008) have also been used. It is common knowledge that applying liming materials can overcome the problems resulting from acidic conditions, such as stored metals, and release them by dissolution during wetting events.…”

Section: Determined Responsible Editor: Philippe Garriguesmentioning

confidence: 99%

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

Hou

Duan

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

Electrolytic manganese solid waste (EMSW) is a by-product of electrolytic manganese production and generally contains a high concentration of soluble Mn(II) (2000-3000 mg/L). Millions of tons of EMSW are stored in China, and the environmental pollution caused by manganese in this waste product is concerning. Unfortunately, little attention has been paid to the immobilization of manganese from industrial solid waste because manganese is absent from toxicological identification standards, and there is a lack of relevant quality standards in China. The objectives of this study were to immobilize soluble Mn(II) using chemical reagents, to analyze the immobilization mechanism, and to identify the most economical reagents. We investigated the immobilization degrees of soluble Mn(II) achieved by the reagents quicklime (CaO), carbonates (NaHCO 3 and Na 2 CO 3 ), phosphates (Na 3 PO 4 , Na 2 HPO 4 , NH 4 H 2 PO 4 , and Ca 10 (PO 4 ) 6 (OH) 2 ), and caustic magnesia (MgO) both individually and in combination. Our results showed that the use of 9 % CaO+ 5 % NaHCO 3 , 9 % CaO+ 5 % Na 3 PO 4 , 10 % MgO alone, or with 1-5 % NaHCO 3 or 1-5 % Na 2 CO 3 can reduce the amount of Mn(II) leached to 100 mg/kg when the eluate pH was in the range of 6-9. The most economical reagent treatments were determined using K-means cluster analysis. Analysis of the immobilization mechanism showed that CaO + NaHCO 3 may be favorable for immobilizing soluble Mn(II) as precipitation and oxidation products because the addition of NaHCO 3 releases OH − and buffers the system.

show abstract

Section: Determined Responsible Editor: Philippe Garriguesmentioning

confidence: 99%

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

Hou

Duan

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…However, some metal hydroxides (such as Pb and Zn) may have high solubility rates at a high pH range of about 12 due to their amphoteric properties. As discussed in a previous study (Cubukcuoglu & Ouki, 2012), metal leaching is normally limited in the pH range 7-12. However, due to the amphoteric behaviour of some metals, their solubility and hence an increase in their leaching potential would not be unexpected.…”

Section: Granular Leaching Test Resultsmentioning

confidence: 99%

“…The physical properties of S/S EAFD are determined through the use of certain experimental techniques which were reported earlier (Cubukcuoglu & Ouki, 2012) with performance threshold values identified by Stegemann and Zhou (2009). UCS results are presented only for mix designs at 28 days (before and after WI) with the threshold value at UCS 28days > 1 MPa.…”

Section: Physical Propertiesmentioning

confidence: 99%

“…In addition to well-established binding agents, a less commonly used material, low-grade MgO (MgO hereafter), was also used in this study. A limited data is available on the use of MgO in the S/S of EAFD (Cubukcuoglu & Ouki, 2012;Fernández, Chimenos, Raventós, Miralles, & Espiell, 2003) whereas wide range of data is available on the use of PFA in the S/S treatment of hazardous wastes. Hence, this paper aims to compare the effectiveness of these two binders in S/S of EAFD by both testing the physical (unconfined compressive strength (UCS) test) and chemical characteristics (via various leaching tests) of samples before and after S/S.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of mechanical and leaching behaviours of pulverised fuel ash/low-grade magnesium oxide-cement blended stabilised/solidified baghouse dust

Cubukcuoglu

Ouki

2017

European Journal of Environmental and Civil Engineering

Self Cite

View full text Add to dashboard Cite

This paper investigates the leaching potential of heavy metals present in stabilised/solidified (S/S) electric arc furnace dust (EAFD). Granular leaching test results showed that Mo was effectively stabilised by Portland cement type I (CEMI) and MgO at 1:2:7 and 3:12:35 ratios. Monolithic leaching test results showed that pulverised fuel ash (PFA) stabilised Zn and Pb but not Mo and Cl. MgO was highly effective in reducing Zn leaching. X-ray diffraction analysis revealed the presence of zinc ferrite in the solidified EAFD products which explains the excellent immobilisation of Zn. The leaching mechanisms analysis demonstrated that few S/S samples exhibited a leaching behaviour dominated by diffusion with the majority displaying a leaching mode dominated by depletion. Although the monoliths' physical integrity was maintained, Pb, Cl and Mo were not effectively immobilised with PFA and MgO-based systems based on the current granular and monolith leaching test protocols.

show abstract

“…Alinhado às necessidades técnicas, ambientais e econômicas, a reciclagem de resíduos, subprodutos e coprodutos em substituição aos minerais naturais pode reduzir custos de produção e melhorar a qualidade dos materiais produzidos. Estudos indicam o potencial uso do PAE na produção de materiais da construção civil, tais como cimento e concreto [6][7][8]. Entretanto, seu uso como aditivo sempre foi limitado em função da redução do tempo de pega acarretado principalmente pelo ZnO presente no PAE.…”

Section: Introductionunclassified

Oportunidades Para Adição De Pó De Aciaria Elétrica No Cimento

Metz¹,

Brehm²,

Moraes³

et al. 2018

ABM Proceedings

View full text Add to dashboard Cite

ResumoA concepção de desenvolvimento sustentável tem resultado no aumento de pressões ambientais para a melhoria da eficiência na utilização de recursos, e para a significativa redução das emissões e da geração de resíduos. No processo de fabricação de aço nas siderúrgicas com fornos elétricos a arco ocorre a geração do resíduo sólido denominado pó de aciaria elétrica (PAE). O PAE é constituído por diferentes óxidos metálicos. Contém cromo, chumbo e cádmio e, por isso, é classificado como resíduo classe I -Perigoso pela NBR 10004 [1]. Gerado em grandes quantidades diariamente em todo o país, o PAE é disposto principalmente em aterros industriais. A indústria da construção civil, devido a quantidade de matérias-primas consumida e variedade de produtos disponíveis -cimento, concreto, agregado, cerâmica, entre outros, apresenta-se como alternativa para a reciclagem de resíduos gerados em outros setores da econômica. Estudos indicam o potencial uso do PAE na produção de materiais da construção civil, tais como cimento e concreto. O objetivo deste trabalho é apresentar uma revisão da literatura sobre a viabilidade técnica da adição do PAE ao cimento como alternativa de valorização desse resíduo. Os estudos sugerem que em quantidades próximas a 1%, a adição de PAE não afeta de forma significativa as propriedades do cimento. Palavras-chave: Pó de aciaria elétrica; Siderurgia; Resíduos sólidos; Cimento. OPPORTUNITIES TO ADD ELECTRIC ARC FURNACE DUST IN CEMENT AbstractThe sustainable development concept has resulted in increased environmental pressures to improve the efficient use of resources and reduction of emissions and waste generation. In the steelmaking process through electric arc furnaces, dust generation occurs which is called electric arc furnace dust (EAFD). EAFD is composed by different metal oxides. Some common elements those constitute this dust, chromium, lead and cadmium, and therefore, waste is classified as class I -hazardous by NBR 10004 [1]. PAE has been generated in large quantities every day across the country and it has mainly landfilled. Due to expressive amount of raw materials consumed in civil construction industry and also the variety of products available (cement, concrete, aggregate, ceramics, among others), this seems to be an alternative for waste recycling generated in other sectors. Studies indicate the potential use of the EAFD in the production of construction materials such as cement and concrete. The objective of this paper is to present a literature review about the technical feasibility of adding EAFD in cement as an alternative valorization of this waste. Studies suggest that in amounts up to 1%, the addition of EAFD does not affect significantly cement properties.

show abstract

Solidification/stabilisation of electric arc furnace waste using low grade MgO

Cited by 36 publications

References 28 publications

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

Comparison of mechanical and leaching behaviours of pulverised fuel ash/low-grade magnesium oxide-cement blended stabilised/solidified baghouse dust

Oportunidades Para Adição De Pó De Aciaria Elétrica No Cimento

Contact Info

Product

Resources

About