Hydrological and geochemical factors affecting leachate composition in municipal solid waste incinerator bottom ash

Johnson, C. Annette; Kaeppeli, Michael; Brandenberger, Sandro; Ulrich, Andrea; Baumann, Werner

doi:10.1016/s0169-7722(99)00052-2

Cited by 92 publications

(40 citation statements)

References 19 publications

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“…This indicated that the relatively higher CaO content of PS Ash 3 added into fly ash tended to increase the pH of the mixtures leachates. This was consistent with the previous study in Reference [24], where the release of Ca from CaO minerals yielded Ca(OH) 2 in aqueous solutions, which is an oxide mineral that significantly contributes to alkalinity. Conversely, FC, which contained the highest CaO content, did not appear to have any impact on elevating the pH of the mixture leachates.…”

Section: Ph Of the Leachatessupporting

confidence: 93%

Effect of Additives on Arsenic, Boron and Selenium Leaching from Coal Fly Ash

et al. 2017

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Abstract:The establishment of an inexpensive leaching control method to prevent the leaching of trace elements from fly ash is required for the utilization of large-scale fly ash as an embankment material. This study examined the effects of the additives on suppressing As, B, and Se leaching from coal fly ash using Ca(OH) 2 , paper sludge ashes (PS Ash 3, PS Ash 4 and PS Ash 5), and filter cake (FC). PS Ash and FC are waste generated in the papermaking and lime industry processes and contain high levels of calcium. The treated fly ash H (FAH) and the resulting mixtures were subjected to a leaching test as per the Environmental Agency of Japan Notifications No. 13. The results indicate that the leaching concentrations of As, B, and Se could be greatly reduced in FAH with the highest effect given by Ca(OH) 2 , followed by PS Ash 3 and PS Ash 5. Ca(OH) 2 greatly reduced both the leaching concentrations of As, B, and Se by about 91-100%, while PS Ash 3 reduced the As and B leaching concentrations by approximately 89-96% and 83-92%, respectively; and PS Ash 5 reduced the Se leaching concentration by about 87-96%. FC did not have any impact on As and B leaching, but reduced Se leaching by about 58-78%. A reason for the decrease in leaching concentrations of As, B, and Se may be the precipitation with calcium or the formation of ettringite. The presence of leached Ca and Na ions are key factors affecting the decrease of As, B, and Se leaching concentrations from fly ash. The utilization of PS Ash 3 and PS Ash 5 as inexpensive additives is a promising method to control the leaching of As, B, and Se into the environment.

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Section: Ph Of the Leachatessupporting

confidence: 93%

Effect of Additives on Arsenic, Boron and Selenium Leaching from Coal Fly Ash

et al. 2017

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“…The changes in the concentrations of Zn, Cu and Cd (Pb was below DL for this sampling) with an increasing trend during a precipitation event cannot be explained by a simple hydrological mechanism. This phenomenon probably results from more complex geochemical/mineralogical reactions, which may include desorption or dissolution of solid phases in the landfill or in the bottom sediment in the stream downgradient to the landfill (similar mechanisms were observed by Johnson et al 1999).…”

Section: Resultsmentioning

confidence: 62%

“…In addition, negative correlations with cumulative precipitation can be observed for the majority of these trace elements (Table 2). Dilution by rainfall has also been observed at other landfill sites (Durmusoglu and Yilmaz 2006;Johnson et al 1999;Pinel-Raffaitin et al 2006). No significant correlations with major compounds (and conductivities) can be observed for Pb, Zn, Cu, Cr and Sb (Table 2).…”

Section: Resultsmentioning

confidence: 67%

“…1). This is a common phenomenon, where a decrease in the conductivity is a response to a decrease in the concentrations of the major components, such as Na, K, Ca, HCO 3 and Cl through dilution by rainwater (Johnson et al 1999). Similar behaviour can also be observed for metals such as Fe, Al, Ba, Sr, Ni, Cr, Co, U, Li, Rb, Cs and metalloids such as Sb, As, Se and V (only representative trace elements shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Temporal Variation of Trace Elements in Waters Polluted by Municipal Solid Waste Landfill Leachate

Ettler

Mihaljevič

Matura

et al. 2008

Bull Environ Contam Toxicol

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Landfill leachate-polluted stream waters were monitored in three sampling campaigns (November 2001 to June 2006), with emphasis on trace elements. The data were evaluated by means of statistics and speciation modelling. Two statistically different groups of trace elements were distinguished: (1) Ba, Sr, Al, Fe, Mn, Cr, Co, Ni, V, As, Se, Sb, U, Li, Rb and Cs decrease during the rain event due to dilution; (2) Pb, Zn, Cu and Cd increase during the rain event due to the dissolution of hydrous ferric oxides and calcite, on whose surfaces these elements are bound, mainly in the stream sediments downgradient to the landfill.

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“…Calculated and measured dependencies of metal solubility from pH-variations indicate (Kersten 1996;Johnson et al 1998) that at between pH 11 and pH 7, concentrations of Pb and Cd remain below 10 À6 mol L À1 ; at pH 7, remobilization of Cd begins, whereas Pb is significantly mobilized only below pH 5. At pH 4, approximately 25% of Cu, 50% of Pb, 45% of Cd, and 70% of the total Zn-inventory has been mobilized.…”

Section: Metals and Final Storage Qualitymentioning

confidence: 99%

Elements and Compounds in Waste Materials

Föstner¹

2004

Elements and Their Compounds in the Environment

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Hydrological and geochemical factors affecting leachate composition in municipal solid waste incinerator bottom ash

Cited by 92 publications

References 19 publications

Effect of Additives on Arsenic, Boron and Selenium Leaching from Coal Fly Ash

Effect of Additives on Arsenic, Boron and Selenium Leaching from Coal Fly Ash

Temporal Variation of Trace Elements in Waters Polluted by Municipal Solid Waste Landfill Leachate

Elements and Compounds in Waste Materials

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