Factors Influencing Mobility of Toxic Metals in Landfills Operated with Leachate Recycle

Gould, Joseph P.; Cross, W.H.; Pohland, Frederick G.

doi:10.1021/bk-1990-0422.ch016

Cited by 10 publications

(4 citation statements)

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“…Nevertheless, the environmental impact of a material does not depend on its total content of hazardous substances, but on their mobility. Some parameters of significance in control of metal mobility such as pH, sulfide, sulfate and chloride contents in a landfill have been studied by Gould, Cross, & Pohland, 1990; the latter reported that a broad range of attenuating mechanisms limiting the mobility of toxic metals in the leachate from columns simulating landfill material with shredded MSW occurred, suggesting that MSW has a capacity for minimizing the mobility of heavy metals.…”

Section: Physico-chemical Propertiesmentioning

confidence: 99%

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Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

2018

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Several landfill mining (LFM) studies have been carried out in recent years all around the world. From these studies qualitative and quantitative information regarding the composition and characteristics of the different fractions excavated from landfills has been obtained. This information comprises data from various landfill sites around the globe from which useful correlations for future LFM projects can be identified. Of particular interest to this paper is the information regarding the fine fractions, which represent to this day a crucial obstacle in the implementation of LFM and enhanced landfill mining (ELFM). The fine fractions make up a considerable portion of the total amount of waste disposed of in landfills. Depending on the particle size chosen as upper limit to define the fines fraction, the portion of this fraction can be as high as 40-80 wt.% of the total excavated waste. These fractions consist of decomposed organic substances, e.g. humic substances, partly weathered mineral waste, e.g. sand, brick fragments, concrete, but also of fine metal particles, especially non-ferrous metals, and still a significant amount of plastics, paper and other calorific fractions. However, although calorific fractions might be used for energy recovery and inorganic fractions for material (especially metal) recovery, current LFM studies are discarding the fine fraction due to lacking or too expensive processing routes. Therefore, it is of critical interest to LFM and ELFM projects to reduce the particle size down to which the excavated material can be processed. This paper, which was elaborated within the framework of the EU Training Network for Resource Recovery through Enhanced Landfill Mining -NEW-MINE, aims to review the obtained data from different LFM studies from municipal solid waste (MSW) landfills, concerning the fines fraction, in order to identify key aspects to be taken into consideration while designing the processing approach in future LFM and ELFM investigations.

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Section: Physico-chemical Propertiesmentioning

confidence: 99%

“…Moreover, studies have reported low leaching rates of heavy metals over relatively long periods of time (Esakku, Palanivelu, & Joseph, 2003;Gould et al, 1990;Kjeldsen et al, 2002;Reinhart & Basel Al-Yousfi, 1996;Ross, Harries, Revans, Cross, & NATHANIEL, 2000).…”

Section: Metals Contentmentioning

confidence: 99%

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

2018

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“…Thus there is a need to assess its variation. (Gould, 1989, Esakku et al, 2003. The pH values of Nyanza MSW dumping site were between 8 and 9, thus copper might have been removed by precipitation and complexation process.…”

Section: Variation Of Chloride Variationmentioning

confidence: 99%

Assessment of heavy metals (Pb, Cu, Cr, Cd and Fe) in the groundwater wells in the vicinity of Nyanza Municipal Solid waste in Kigali City- Rwanda

Nsengimana¹,

Bigirimana²,

Suwa³

et al. 2012

RWJour

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The purpose of this study was to assess the impacts of Nyanza Municipal Solid Waste (MSW) dumping site on groundwater. As many groundwater resources are contaminated by dumping sites that are poorly managed, the equally poorly managed Nyanza MSW dumping site in Kigali could have impact on people depending on groundwater for their daily activities. Leachate samples were taken at the edge of the waste bulk and groundwater samples were collected from the wells located in the vicinity of the dumping site. Sampling was done in dry and wet season using PE bottles. Heavy metals analysis was done using flame atomic absorption method.

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“…Cadmium is consistently inert in neutral and alkaline mediums. Even though Cd is connected with the fly ash particles surface, the concentrations leached in water not often exceed the limits (Gould et al, 1989). The leach-ability of Zn is relatively high for SOFA/LB under TCLP test conditions while, in general, Zn mobility for both FA/LB is very low (Figure 5 and 6).…”

Section: Leachability Of Toxic Elements From Autoclaved Fa/lbmentioning

confidence: 96%

Leachability of Heavy Metals from Autoclaved Fly Ash-Lime Building Bricks

Tanriverdi

Sen

Çiçek

et al. 2021

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The fly ash as a byproduct of coal-fired power plants constitutes vital ecological problems. In Turkey, approximately 15 million tons ofashes are generated via the combustion of 40 million tons of lignite yearly. Worldwide, a number of investigation and applications wereundertaken to utilize fly ash in order to overcome the environmental problems. One of the application area of fly ashes is the production of building bricks. Characterization of fly ash samples from Seyitomer and Yatagan coal-firing power plants were conducted inthis study. TCLP 1311, ASTM3987-85 and EN 12457-2 leaching tests on the cylindrical fly ash/lime brick (FA/LB) samples which wereproduced from Seyitömer and Yatagan thermal power plant fly ash-lime mixtures were performed to determine the leachability ofsome chosen trace elements. The results show that the release of all trace elements was lower than the hazardous material limit valuesof waste acceptance. Thus, non- fired fly ash bricks are an advantageous way to solving environmental effect of disposal of fly ashes.

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Factors Influencing Mobility of Toxic Metals in Landfills Operated with Leachate Recycle

Cited by 10 publications

References 0 publications

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

Assessment of heavy metals (Pb, Cu, Cr, Cd and Fe) in the groundwater wells in the vicinity of Nyanza Municipal Solid waste in Kigali City- Rwanda

Leachability of Heavy Metals from Autoclaved Fly Ash-Lime Building Bricks

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