Investigation of accelerated and natural carbonation of MSWI fly ash with a high content of Ca

Wang, Lei; Jin, Yiying; Nie, Yong

doi:10.1016/j.jhazmat.2009.09.055

Cited by 163 publications

(49 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Characterisation Of As-received Residuesmentioning

confidence: 89%

“…Residue A3 also contained chlorocalcite (KCaCl 3 ) which has previously been observed in carbonated APC residue and attributed to a complex carbonation reaction of the CaClOH phase in the presence of KCl (Wang et al 2010). Carbonation of APC residues prior to treatment may not be a consistent occurrence but has significant implications for the properties of the residues (Baciocchi et al 2009;Cappai et al 2012;Li et al 2007;Wang et al 2010). Unless care is taken to control the process, carbonation will provide another mechanism by which residue characteristics and therefore behaviour will concentrations (at l/s=10) covered ranges similar to those which can be observed when comparing results reported throughout previous literature (Cl: 96,300-~500,000 mg/kg; SO 4 : 7000-20,490 mg/kg) (Baciocchi et al 2009;Cappai et al 2012;Geysen et al 2004b;Lampris et al 2009;Li et al 2007;Quina et al 2008b).…”

Section: Characterisation Of As-received Residuesmentioning

confidence: 89%

“…Variability in the concentration of minor and trace elements, chloride and sulphate salts, and the quantity of residual scrubber present can also be seen throughout the literature concerned with APC residue composition and treatment methods e.g. (Baciocchi et al 2009;Cappai et al 2012;De Boom and Degrez 2012;Dyer et al 2006;Geysen et al 2004b;Li et al 2007;Quina et al 2008b;Wang et al 2010). Residue properties vary not only between facilities but also over time when collected from a single facility (Environment Agency 2002;Quina et al 2008b).…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Waste incinerator residue treatment: variability implications

Shirley

Hawthorne²,

Black³

2015

Proceedings of the Institution of Civil Engineers - Waste and R

View full text Add to dashboard Cite

Air pollution control residues are a hazardous waste, collected when controlling the flue gas emissions created within modern energy from waste (EfW) incinerators. They are inherently variable with regards to mineralogy and morphology. However, this variability is frequently neglected throughout the scientific literature concerned with their management. This work characterises residues collected from five different UK facilities and highlights the implications of their compositional variability for the performance of products resulting from a stabilisation/solidification treatment. It is demonstrated that the variability is of significance for the mineralogy and several key engineering properties of the products, and links between the properties of the residues and the behaviour of the products are shown. Residue variability should be considered when researching technical management options. Treatments are likely to require modification in order to satisfy performance envelopes for individual batches of residue.

show abstract

Section: Characterisation Of As-received Residuesmentioning

confidence: 89%

Section: Characterisation Of As-received Residuesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Waste incinerator residue treatment: variability implications

Shirley

Hawthorne²,

Black³

2015

Proceedings of the Institution of Civil Engineers - Waste and R

View full text Add to dashboard Cite

show abstract

“…In fact, (45), conclude that the carbonation process can be used as a pre-treatment for the retention of heavy metals, while a series of MSWI fly ash washings are carried out to remove soluble salts. Table 5 shows the mean value of six data gatherings for each analyzed sample, data concerning the percentage of carbonate surface, regarding the total fracture surface of each of the mortar specimens tested.…”

Section: Carbonationmentioning

confidence: 99%

Improved cement mortars by addition of carbonated fly ash from solid waste incinerators

López-Zaldívar¹,

Mayor-Lobo²,

Fernández-Martínez³

et al. 2015

Mater. construcc.

View full text Add to dashboard Cite

This article presents the results of a research developing high performance cement mortars with the addition of municipal solid waste incineration fly ash (MSWIFA) stabilized as insoluble carbonates. The encapsulation of hazardous wastes in mortar matrixes has also been achieved. The ashes present high concentrations of chlorides, Zn and Pb. A stabilization process with NaHCO 3 has been developed reducing 99% the content of chlorides. Developed mortars replace 10% per weight of the aggregates by treated MSWIFA. Physical/mechanical properties of these mortars have been studied. Presence of Zn, Pb, Cu and Cd has been also analyzed confirming that leaching of these heavy metal ions is mitigated. Conclusions prove better behavior of CAC and CSA mortars than those of CEM-I and CEM-II cement. Results are remarkable for the CAC mortars, improving reference strengths in more than 25%, which make them a fast-curing product suitable for the repair of structures or industrial pavements. RESUMEN: Morteros de cemento mejorados con la adición de cenizas volantes carbonatadas provenientes de la incineración de residuos.Este artículo presenta los resultados del desarrollo de morteros mejorados con la incorporación de cenizas volantes de residuos sólidos urbanos inertizadas en forma de carbonatos. Además se consigue la encapsulación de un residuo peligroso. Las cenizas presentan una alta concentración de cloruros, Zn y Pb. Se ha desarrollado un proceso de estabilización con NaHCO 3 reduciendo en un 99% el contenido de cloruros. Los morteros reemplazan un 10% en peso del árido por cenizas tratadas. Se han analizado sus propiedades físico/mecánicas y la presencia de Zn, Pb, Cu y Cd. Se demuestra un mejor comportamiento de los morteros de CAC y CSA que los de CEM-I y CEM-II y se mitiga el lixiviado de metales pesados. Los resultados son significativos en los morteros CAC al mejorar las resistencias de los de referencia en un 25%. Los morteros desarrollados son de curado rápido adecuados para la reparación de estructuras o soleras industriales.

show abstract

“…[12][13][14] Complete carbonization can decrease the leaching of metals by 80 %. [14][15][16] Previous research [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] has shown that metal stabilization processes are more efficient if the treatment of the waste dust is conducted over an extended period of time and at high CO 2 concentrations.…”

Section: Introductionmentioning

confidence: 99%

Neutralization of waste filter dust with CO2

Kračun¹,

Anžel²,

Zemljič³

2015

Mater. Tehnol.

View full text Add to dashboard Cite

In this paper we report on the possibility of neutralizing filter dust from Talum Livarna d.o.o. The filter dust that remains after cleaning flue gas with the classification number of waste 10 10 09* is alkaline and contains heavy metals, non-metals, organic pollutants, and, therefore, has the properties of hazardous waste. The possibility of neutralizing this dust with CO2 was studied. The results showed that the treatment successfully lowered the pH value between the limits 6 and 9, which is within the legal constraints of pollution for strong acidic or alkaline waste. The contents of the hazardous substances were lowered, i.e., As, Cu, Ba, Zn, Cd, Cr, Ni, Pb, Sn, Mn and V, with percolation values that are below the level of the prescribed threshold-limit values for substances that allows their disposal in non-hazardous waste landfills. Only the percolation values of Sb, Cd, Mo and Se exceed the prescribed threshold limit values of substances that allow their disposal in inert waste landfills. The XRD analysis after the neutralization of the filter dust using CO2 showed no presence of CaO. The neutralized filter dust can be land filled as a stabilized and unreactive waste in landfills for nonhazardous wastes. Their properties also offer the possibility for incorporating them into some other material or product, such as the production of new composite materials, their use in construction products and perhaps cements or usage in backfills. Keywords: hazardous waste, filter dust, neutralization, stabilization, chemical properties Raziskali smo mo`nost nevtralizacije filtrskega prahu iz podjetja Talum Livarna, d. o. o. Filtrski prah po~i{~enju dimnih plinov s klasifikacijsko {tevilko odpadka 10 10 09* je alkalen, vsebuje te`ke kovine, nekovine, organska onesna`evala, zato ima lastnosti nevarnega odpadka. Filtrski prah smo nevtralizirali s CO2, da je nastal prete`no amorfen produkt. Po obdelavi smo uspe{no zni`ali pH-vrednost v meje med 6 in 9, kar je v dovoljenem obmo~ju za odpadke, onesna`ene z mo~no kislino ali bazo. Prav tako je bila zmanj{ana vsebnost nevarnih snovi, in sicer As, Cu, Ba, Zn, Cd, Cr, Ni, Pb, Sn, Mn in V, tako da so izlu`evalne vrednosti pod mejo predpisanih parametrov izlu`ka in je tako dovoljeno odlaganje na odlagali{~ih za nenevarne odpadke. Samo izlu`evalne vrednosti Sb, Cd, Mo in Se {e prekora~ujejo predpisane mejne vrednosti, ki so dovoljene za odlaganje na odlagali{~ih za inertne odpadke. XRD-analiza po nevtralizaciji filtrskega prahu s CO2 ni pokazala prisotnosti CaO. Nevtraliziran filtrski prah se lahko odlo`i kot stabiliziran in nereaktiven odpadek na odlagali{~ih nenevarnih odpadkov. Glede na lastnosti obstaja mo`nost predelave in uporabe v koristne namene, npr. za proizvodnjo novih kompozitnih materialov, gradbenih izdelkov, morda cementa ali za zasipavanje.

show abstract

Investigation of accelerated and natural carbonation of MSWI fly ash with a high content of Ca

Cited by 163 publications

References 28 publications

Waste incinerator residue treatment: variability implications

Waste incinerator residue treatment: variability implications

Improved cement mortars by addition of carbonated fly ash from solid waste incinerators

Neutralization of waste filter dust with CO2

Contact Info

Product

Resources

About