Arsenic and lead release from fly ash stabilized/solidified soils under modified semi-dynamic leaching conditions

Moon, Deok Hyun; Dermatas, Dimitris

doi:10.1016/j.jhazmat.2006.05.085

Cited by 97 publications

(50 citation statements)

References 20 publications

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“…If FA contains more than 20% CaO, it is classified as self-cementing Class C FA, while Class F FA generally contains less than 10% CaO. FA presents mechanical features slightly lower than PC (especially Class F), influencing the performance of the S/S treated matrices if used instead of PC as a binder, but it can be successfully used for soil stabilisation or in other civil construction applications (Moon, Dermatas 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In Pb polluted soils treated with PC and/or FA, two possible mechanisms may be responsible for the immobilisation of the contaminant during the hydration phases (Moon, Dermatas 2007). One mechanism may be precipitation resulting from the formation of lead silicate oxide.…”

Section: Introductionmentioning

confidence: 99%

“…Physical encapsulation can be achieved by creating a solidified monolith, while chemical inclusion can be achieved through the incorporation of lead in binder hydration products, such as CSH gel phases, which play such an important role in the retention of metal. The main mechanisms that determine Pb immobilization in the solid matrix, similarly to other heavy metals, are: sorption on clay and pozzolanic reaction products (Moon, Dermatas 2007) and addition (Eq. (1)) or substitution (Eq.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, it was found that the hydration of cement, and materials such as FA, can be highly modified by heavy metal concentration due to coating around binder grains (Malviya, Chaudhary 2006) and that altered features of hydration products can result in a change of characteristics of the matrices treated by S/S in terms of mechanical strength, durability, curing time, permeability and leachability (Jing et al 2004;Ouki, Hills 2002 (Moon, Dermatas 2007) that reduce the permeability of the matrices and increase the setting times.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Performance Threshold Approach for Identifying the Management Options for Stabilisation/Solidification of Lead Polluted Soils

Falciglia

Al‐Tabbaa

Vagliasindi

2014

Journal of Environmental Engineering and Landscape Management

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Abstract. Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using laboratory selected bacterial strains as inoculum, biostimulation with molasses and cabbage leaf extract, and phytoremediation using rye and blue fenugreek to study the effect of these treatments on TNT removal and changes in soil microbial community responsible for contaminant degradation. Chemical analyses revealed significant decreases in TNT concentrations, including reduction of some of the TNT to its amino derivates during the 28-day tests. The combination of bioaugmentation-biostimulation approach coupled with rye cultivation had the most profound effect on TNT degradation. Although plants enhanced the total microbial community abundance, blue fenugreek cultivation did not significantly affect the TNT degradation rate. The results from molecular analyses suggested the survival and elevation of the introduced bacterial strains throughout the experiment. Keywords: TNT, bioaugmentation, biostimulation, phytoremediation, microbial community.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of a Performance Threshold Approach for Identifying the Management Options for Stabilisation/Solidification of Lead Polluted Soils

Falciglia

Al‐Tabbaa

Vagliasindi

2014

Journal of Environmental Engineering and Landscape Management

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“…In this study stabilization was used in order to remediate cadmium contaminated sediment, since this is a widely accepted treatment process for the immobilization of heavy metals contained in wastes [11,21,31].…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Cadmium from Contaminated Sediment Using Cardboard Mill Sludge

Prica¹,

Dalmacija²,

Dalmacija³

et al. 2012

Archives of Environmental Protection

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Abstract:Sludge from cardboard mill is most commonly landfi lled, but it could also be recycled on-site into production or reused in some other way. In this study the use of sludge from cardboard mill as stabilizing agent in the stabilization treatment of cadmium polluted sediment was examined. The effectiveness of treatment and long-term leaching behavior of cadmium was evaluated by determining the cumulative percentage of cadmium leached, diffusion coeffi cients (De) and by applying different leaching tests (semi-dynamic test, toxicity characteristic leaching procedure, waste extraction test). In order to simulate the "worst case" leaching conditions, the semi-dynamic leaching test was modifi ed using 0.014 M acetic acid (pH = 3.25) and humic acids solution (20 mg l -1 TOC) as leachants instead of deionized water. A diffusion-based model was used to elucidate the controlling leaching mechanisms. Applied treatment was effective in immobilizing cadmium irrespective of high availability in the untreated sample. The controlling leaching mechanism appeared to be diffusion, which indicates that a slow leaching of cadmium could be expected when the cardboard mill sludge as stabilization agent is applied.

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Lead in Water and Soil: Speciation, Toxicity, and Treatment Technologies

Manecki

2019

Encyclopedia of Water

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Lead (Pb) is widely distributed in the environment and its negative health effects, especially to children, have been well documented. The aqueous species of Pb, in their form and concentration, strongly depend on mineral–water interaction processes in the environment. Lead exists in the environment mostly in the form of solid particles but bioavailable toxic Pb is absorbed by living organisms through solution. Therefore, our understanding of formation, transformation, dissolution, and precipitation of Pb‐bearing phases in aqueous solutions is critical for successful strategies to minimize Pb in drinking water or food and to prevent exposure and poisoning. This article summarizes our current understanding of processes governing the presence of Pb in waters and soils, briefly discusses Pb toxicity, and reviews some key technologies for immobilizing Pb and making it less bioavailable. Finally, the article ends with some suggestions for further research.

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Arsenic and lead release from fly ash stabilized/solidified soils under modified semi-dynamic leaching conditions

Cited by 97 publications

References 20 publications

Development of a Performance Threshold Approach for Identifying the Management Options for Stabilisation/Solidification of Lead Polluted Soils

Development of a Performance Threshold Approach for Identifying the Management Options for Stabilisation/Solidification of Lead Polluted Soils

Immobilization of Cadmium from Contaminated Sediment Using Cardboard Mill Sludge

Lead in Water and Soil: Speciation, Toxicity, and Treatment Technologies

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