Leaching behaviour of elements and evaluation of pre-treatment methods for                 municipal solid waste incinerator residues in column leaching tests

Kim, Sang-Yul; Tanaka, Nobutoshi; Matsuto, Toshihiko; Tojo, Yasumasa

doi:10.1177/0734242x05055322

Cited by 22 publications

(7 citation statements)

References 8 publications

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“…Zn concentration peaks for C3 and C4 occur at L/S 0.2 and were 13 and 35% higher, respectively (Figure 3a). Similar results have been presented previously for Ca, K, and Cl (Sabbas et al 2003, Kim et al 2005, and under certain conditions for Cu and Pb (Kim et al 2005), but this phenomenon was not commented. These deviations cannot be explained by the measured pH and redox-potential differences, which both remained small (Table 4).…”

Section: Resultssupporting

confidence: 82%

“…These deviations cannot be explained by the measured pH and redox-potential differences, which both remained small (Table 4). Similar results have been presented previously for Ca, K, and Cl (Sabbas et al 2003, Kim et al 2005, and under certain conditions for Cu and Pb (Kim et al 2005), but this phenomenon was not commented. Possibly, due to the large column sizes and the low flow rate, the time passed to collect the leachate played a role for the released concentrations in this study, which would imply that these cannot be regarded mainly as a function of the L/S ratio under these circumstances.…”

Section: Resultssupporting

confidence: 82%

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Metal releases from a municipal solid waste incineration air pollution control residue mixed with compost

Praagh

Persson

2008

Waste Manag Res

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The influence of 10 wt.% mature compost was tested on the heavy metal leachate emissions from a calcium-rich municipal solid waste incineration air pollution control residue (MSWI APC). Apart from elongated columns (500 and 1250 mm), an otherwise norm compliant European percolation test setup was used. More than 99% of the metals Al, As, Cd, Cr, Cu, Fe and Ni were left in the APC residue after leaching to a liquid-to-solid ratio (L/S) of 10. Apparent short-term effects of elevated leachate DOC concentrations on heavy metal releases were not detected. Zn and Pb leachate concentrations were one order of magnitude lower for L/S 5 and 10 from the pure APC residue column, which suggests a possible long-term effect of compost on the release of these elements. Prolonging the contact time between the pore water and the material resulted in elevated leachate concentrations at L/S 0.1 to L/S 1 by a factor of 2. Only Cr and Pb concentrations were at their maxima in the first leachates at L/S 0.1. Equilibrium speciation modelling with the PHREEQC code suggested portlandite (Ca(OH)2) to control Ca solubility and pH.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 82%

Metal releases from a municipal solid waste incineration air pollution control residue mixed with compost

Praagh

Persson

2008

Waste Manag Res

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“…This result is supported by the findings of Johnson et al [16], where Si dissolution also occurred in acid pH (pH ≈ 3.5) [16]. Al leaching may be due to the decomposition of amorphous Al(OH) 3 , as reported by several other authors [5,14,25]. The I-ash sample presented an analogous leaching trend, but much lower amounts of Al and Si were leached at pH 2; 13 and 5 g/kg-ash, respectively.…”

Section: Effect Of Ph On the Leaching Of Organic Carbon (Doc) And Othsupporting

confidence: 90%

Organic carbon leaching behavior from incinerator bottom ash

Guimaraes¹,

Okuda²,

Nishijima³

et al. 2006

Journal of Hazardous Materials

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“…It was significantly enriched with Ca due to the semi-dry air pollution control device, into which excess Ca(OH) 2 was injected to scrub acidic gaseous contaminants from flue gas . As shown in Table , Ca comprised the largest percentage by weight of FA, which is consistent with the previously reported data for FA from the bag filter with lime injection under different furnace styles (19.47–49.60%). − The adequate supply Ca of FA, which is much more than that of FA from the electrostatic precipitator (ESP), ,,− may be favorable to the production of calcium-containing zeolites, such as tobermorite and katoite. However, Si and Al in raw FA were only 2.11 and 0.61%, respectively.…”

Section: Resultssupporting

confidence: 82%

“… h FA from ESP (the mean of 18 ash), stoker grate furnace, France i FA from ESP, Sapporo, Japan j FA from ESP, Iserlohn, Ruhr, Germany …”

Section: Resultsmentioning

confidence: 99%

Effect of Ca–Si–Al Element Proportion on the Formation of Aluminosilicate Minerals and Detoxification of PAHs in Fly Ash from MSW Incineration during the Hydrothermal Process

Shi

Tong

et al. 2021

Energy Fuels

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Fly ash (FA) produced during municipal solid waste incineration contains hazardous polycyclic aromatic hydrocarbons (PAHs). Hydrothermal treatment (HT), a promising technology for the degradation of organic compounds, was applied in this study for hydrothermal detoxification of PAHs in FA. Due to different levels of Ca/(Si + Al) and Al/(Si + Al) molar ratios achieved by adjusting the SiO2 and Al2O3 added to FA, different kinds of aluminosilicate minerals were formed and different detoxification efficiencies of PAHs were observed in HT products. For aluminosilicate minerals formed at lower (0.17) and moderate (0.51) Al/(Si + Al) ratio levels, tobermorite was obtained and it enhanced with the decrease of Ca/(Si + Al) ratio levels. At higher Al/(Al + Si) ratio levels of 0.71, tobermorite cannot be synthesized completely even when the Ca/(Si + Al) ratio for FA-30-3 (1.01) was low and in the suitable range for tobermorite formation (0.67–1.20). Compared with the Ca/(Si + Al) ratio, the Al/(Si + Al) ratio not only affected the synthesis of tobermorite but also had much more significant influence on both the removal percentage of the concentration of PAHs and the removal percentage of the toxicity equivalent quality (TEQ) of PAHs. Attributing to the fact that tobermorite cannot be synthesized at higher Al/(Al + Si) ratio levels of 0.71, the weakest detoxification efficiency of PAHs was observed. When tobermorite was effectively synthesized in FA-30-1, for which both the Ca/(Al + Si) and Al/(Al + Si) ratios were in the suitable range for tobermorite formation [Ca/(Al + Si) ratio = 0.67–1.20 and Al/(Al + Si) ratio = 0–0.22], the best detoxification efficiency of PAHs was achieved. The formation of tobermorite affected by the Ca–Si–Al element proportion during the HT process has a positive effect on the detoxification of PAHs in FA. The results of regression analysis performed for investigating the relationship between the content of minerals formed and the detoxification efficiency of PAHs showed that the formation of tobermorite is helpful to promote the detoxification of PAHs but the existence of hydrocalumite reduced the detoxification. Compared with the Ca/(Si + Al) ratio, the Al/(Si + Al) ratio has more significant influence on the formation of tobermorite and hydrocalumite.

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Leaching behaviour of elements and evaluation of pre-treatment methods for municipal solid waste incinerator residues in column leaching tests

Cited by 22 publications

References 8 publications

Metal releases from a municipal solid waste incineration air pollution control residue mixed with compost

Metal releases from a municipal solid waste incineration air pollution control residue mixed with compost

Organic carbon leaching behavior from incinerator bottom ash

Effect of Ca–Si–Al Element Proportion on the Formation of Aluminosilicate Minerals and Detoxification of PAHs in Fly Ash from MSW Incineration during the Hydrothermal Process

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