Geochemical Modeling Applied in Waste Disposal, and Its Relevance for Municipal Solid Waste Management

Araujo, Francisco S. M.; Fantucci, Hugo; Nunes, Everton Barbosa

doi:10.3390/min10100846

Cited by 5 publications

(3 citation statements)

References 52 publications

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“…Thermodynamic modeling and speciation calculations of geochemical systems (based on the combination of reaction equilibrium constants) are well known in the case of environmental systems: lakes, rivers, but also soils and wastes [Dick, 2019, Araujo et al, 2020. For example, in the present case, it can be shown [Huizenga et al, 2012] that the reaction:…”

Section: L'étoile Du Sud: Natural and Synthetic Diamondsmentioning

confidence: 89%

Literature & Geosciences: Jules Verne’s geological novels, from the 19th to the 21st century

Bollinger¹

2022

Comptes Rendus. Géoscience

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A friend of both François Arago, who founded the Comptes Rendus de l'Académie des Sciences, and his brother Jacques, a renowned traveler, Jules Verne wrote many novels in which his heroes made use of the most recent scientific knowledge of the time. While the novelist only really had a legal background, he did keep himself apprised of all the latest scientific developments. This study, based on a selection of novels wherein geology is very present as well as on contemporary or current scientific publications, shows that today's understanding of the geosciences does indeed agree with Jules Verne's extrapolations. Among the subjects developed are: coal extraction and the hazards of firedamp, so-called "mud volcanoes" and the special case of gold trickling from volcanoes, diamond geo-genesis, the creation of an inland sea in the Sahara, and a foretelling of the Anthropocene Epoch.Résumé. Ami de François Arago, le fondateur des Comptes Rendus de l'Académie des Sciences, et de son frère Jacques, un grand voyageur, Jules Verne (1828-1905) a écrit de nombreux romans dans lesquels ses héros utilisent les connaissances scientifiques les plus récentes de l'époque. En effet le romancier, s'il n'avait qu'une formation juridique, se tenait informé des développements de la science. Dans cette étude, basée d'une part sur un choix de romans où la géologie est très présente, et d'autre part sur des publications scientifiques contemporaines ou actuelles, on montre que les géosciences d'aujourd'hui sont en accord avec les extrapolations de Jules Verne. Parmi les sujets développés, citons : l'extraction du charbon et les risques de grisou, les volcans dits « de boue » et le cas particulier de l'or qui s'écoule de certains volcans, la géo-genèse des diamants, la création d'une mer intérieure dans le Sahara, et une prédiction de l'époque Anthropocène.

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Section: L'étoile Du Sud: Natural and Synthetic Diamondsmentioning

confidence: 89%

Literature & Geosciences: Jules Verne’s geological novels, from the 19th to the 21st century

Bollinger¹

2022

Comptes Rendus. Géoscience

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“…Such chemical solutions may be the result of impregnation or surface effluents from waste storage facilities. The possibility of such a scenario in the case of disposal of solid municipal waste is indicated, for example, in review paper [26]. The possibility of such filtration flows is also mentioned in work [27], which investigates the BIOLEACH model for assessing the production of biogas in real time.…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

Constructing a mathematical model and studying numerically the effect of bio-clogging on soil filtration consolidation

Ivanchuk¹,

Martyniuk²,

Michuta³

et al. 2021

EEJET

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Mathematical modeling and computer simulation methods have been used to investigate the extent of influence exerted by bio-clogging on the dynamics of excess head scattering in the soil massif. To this end, the classical equation of filtration consolidation has been modified for the case of variable porosity resulting from changes in the biomass. The numerical solution to the constructed mathematical model in the form of a nonlinear boundary problem was derived by a finite-element method. Numerical experiments were carried out and their analysis was performed. Specifically, this paper shows the charts of pressure differences in the soil array when neglecting bio-clogging and when estimating the effects exerted by bio-clogging at specific points in time. The numerical experiments demonstrated that in two years after the onset of the consolidation process in the neighborhood of the lower limit of the examined soil mass with a thickness of 10 meters, excess heads fall from the initial value of 10 m to 4 m. The greatest impact from the clogging of pores by microorganisms is revealed in the neighborhood of an upper limit. At a depth of 1 m, at t=180 days, the pressure difference reaches 2.4 m. This is about 200 % of the pressure distribution without taking into account the effects of bio-clogging. Over time, the effect of bacteria on the distribution of pressures in the neighborhood of the upper boundary decreases. However, this effect extends to the entire soil mass, up to the lower limit. Thus, at t=540 days, at the lower limit, the effect of bio-clogging leads to that excess heads are 1.8 m greater than for the case of pure water filtration (a relative increase of about 80 %). Bio-clogging processes are intensified as a result of the development of microorganisms when organic chemicals enter the porous environment. Therefore, from a practical point of view, studying them is especially relevant for household waste storage facilities and the stability of their soil bases. It is advisable to undertake research by using the methods of mathematical modeling and computer simulation

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“…The long-term evolution of leachates at large disposal sites under ambient environmental conditions has also been described recently [19]. Nowadays geochemical modelling plays an important role in evaluating the quality of water from landfill and metal speciation within soil in an industrial area [15,20,21]. Recently it was shown that investigating the release of heavy metals from old metallurgical dumps under varying pH conditions can be an appropriate approach to evaluate different management scenarios [22,23].…”

Section: Introductionmentioning

confidence: 99%

Leaching and Geochemical Modelling of an Electric Arc Furnace (EAF) and Ladle Slag Heap

Loncnar

Mladenovič

Serjun

et al. 2022

Toxics

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Old metallurgical dumps across Europe represent a loss of valuable land and a potential threat to the environment, especially to groundwater (GW). The Javornik electric arc furnace (EAF) and ladle slag heap, situated in Slovenia, was investigated in this study. The environmental impact of the slag heap was evaluated by combining leaching characterization tests of landfill samples and geochemical modelling. It was shown that throughout the landfill the same minerals and sorptive phases control the leaching of elements of potential concern, despite variations in chemical composition. Although carbonation of the disposed steel slags occurred (molar ratio CO3/(Ca+Mg) = 0.53) relative to fresh slag, it had a limited effect on the leaching behaviour of elements of potential concern. The leaching from the slag heaps had also a limited effect on the quality of the GW. A site-specific case, however, was that leachates from the slag heap were strongly diluted, since a rapid flow of GW fed from the nearby Sava River was observed in the landfill area. The sampling and testing approach applied provides a basis for assessing the long-term impact of release and is a good starting point for evaluating future management options, including beneficial uses for this type of slag.

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Geochemical Modeling Applied in Waste Disposal, and Its Relevance for Municipal Solid Waste Management

Cited by 5 publications

References 52 publications

Literature & Geosciences: Jules Verne’s geological novels, from the 19th to the 21st century

Literature & Geosciences: Jules Verne’s geological novels, from the 19th to the 21st century

Constructing a mathematical model and studying numerically the effect of bio-clogging on soil filtration consolidation

Leaching and Geochemical Modelling of an Electric Arc Furnace (EAF) and Ladle Slag Heap

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