Leaching mechanisms of oxyanionic metalloid and metal species in alkaline solid wastes: A review

Cornelis, Geert; Johnson, C. Annette; Gerven, Tom Van; Vandecasteele, Carlo

doi:10.1016/j.apgeochem.2008.02.001

Cited by 333 publications

(223 citation statements)

References 187 publications

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“…The release of Cr, Pb, Se and Zn was influenced by pH conditions following typical release curves, as found for other incineration residues (e.g. [7,35,36,37,38,39]). Similar results were obtained during the first sampling campaign (results reported in Fig.…”

supporting

confidence: 57%

Quality and generation rate of solid residues in the boiler of a waste-to-energy plant

Allegrini

Boldrin

Jansson

et al. 2014

Journal of Hazardous Materials

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supporting

confidence: 57%

Quality and generation rate of solid residues in the boiler of a waste-to-energy plant

Allegrini

Boldrin

Jansson

et al. 2014

Journal of Hazardous Materials

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“…Vanadium is generally not considered in the risk assessments of trace elements from ferrous BF slags due to the low concentrations [3,7]. However, the BF slags used in this study, M-kalk and Merit 5000, were high in vanadium because of naturally high vanadium levels in the iron ore [4].…”

Section: Vanadium Concentrations and Speciation In Slags And Soilsmentioning

confidence: 94%

“…This results in BF slags that are naturally high in vanadium and concentrations can reach above 500 mg V kg -1 [5]. The BF slag is considered relatively inert [6] and data of vanadium leaching from BF slags are scarce [7]. Availability tests, which estimate the potential leaching, have shown that about 10 % of the vanadium in BF slag can be leached [8].…”

Section: Introductionmentioning

confidence: 99%

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Vanadium bioavailability in soils amended with blast furnace slag

Larsson

Baken

Smolders

et al. 2015

Journal of Hazardous Materials

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Blast furnace (BF) slags are commonly applied as soil amendments and in road fill material. In Sweden they are also naturally high in vanadium. The aim of this study was to assess the vanadium bioavailability in BF slags when applied to soil. Two soils were amended with up to 29 % BF slag (containing 800 mg V kg -1 ) and equilibrated outdoors for 10 months before conducting a barley shoot growth assay. Additional soil samples were spiked with dissolved vanadate(V) for which assays were conducted two weeks (freshly spiked) and 10 months (aged) after spiking. The BF slag vanadium was dominated by vanadium(III) as shown by V K-edge XANES spectroscopy. In contrast, results obtained by HPLC-ICP-MS showed that vanadium(V), the most toxic vanadium species, was predominant in the soil solution. Barley shoot growth was not affected by the BF slag additions. This was likely due to limited dissolution of vanadium from the BF slag, preventing an increase of dissolved vanadium above toxic thresholds. The difference in vanadium bioavailability among treatments was explained by the vanadium concentration in the soil solution. It was concluded that the vanadium in BF slag is sparingly available. These findings should be of importance in environmental risk assessment.

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“…Leaching experiments were simulated reactions of the spilled TVA ash (Figure 1) with solutions exhibiting a wide range of acidity (pH of 0. [4][5][6][7][8][9][10][11][12] and ash/water ratios (1 × 10 -5 to 3.5 × 10 -3 ).…”

Section: Introductionmentioning

confidence: 99%

Environmental Impacts of the Coal Ash Spill in Kingston, Tennessee: An 18-Month Survey

Ruhl

Vengosh

Dwyer

et al. 2010

Environ. Sci. Technol.

141

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An 18 month investigation of the environmental impacts of the Tennessee Valley Authority (TVA) coal ash spill in Kingston, Tennessee combined with leaching experiments on the spilled TVA coal ash have revealed that leachable coal ash contaminants (LCACs), particularly arsenic, selenium, boron, strontium, and barium, have different effects on the quality of impacted environments. While LCACs levels in the downstream river water are relatively low and below the EPA drinking water and ecological thresholds, elevated levels were found in surface water with restricted water exchange and in pore water extracted from the river sediments downstream from the spill. The high concentration of arsenic (up to 2000 µg/L) is associated with some degree of anoxic conditions and predominance of the reduced arsenic species (arsenite) in the pore waters. Laboratory leaching simulations show that the pH and ash/water ratio control the LCACs' abundance and geochemical composition of the impacted water. These results have important implications for the prediction of the fate and migration of LCACs in the environment, particularly for the storage of coal combustion residues (CCRs) in holding ponds and landfills, and any potential CCRs effluents leakage into lakes, rivers, and other aquatic systems.

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Leaching mechanisms of oxyanionic metalloid and metal species in alkaline solid wastes: A review

Cited by 333 publications

References 187 publications

Quality and generation rate of solid residues in the boiler of a waste-to-energy plant

Quality and generation rate of solid residues in the boiler of a waste-to-energy plant

Vanadium bioavailability in soils amended with blast furnace slag

Environmental Impacts of the Coal Ash Spill in Kingston, Tennessee: An 18-Month Survey

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