Analysis of leaks from geomembrane in a sanitary landfill through models of electrical resistivity tomography in South Brazil

Moreira, César Augusto; Helene, Lívia Portes Innocenti; Nogara, Paulo; Ilha, Lenon Melo

doi:10.1007/s12665-017-7180-x

Cited by 20 publications

(5 citation statements)

References 19 publications

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“…Subsequently, the generation of 3D visualization models was made through the use of Oasis Montaj Platform (Geosoft), whose process of interpolation of the previous 2D geophysical products is based on the methods of kriging and minimum curvature, designed to guarantee the smoothing of the central values concerning the limits of the investigated area. The use of this kind of model, frequently applied in mineral prospection researches [62][63][64], makes possible a broad analysis of the hydrogeological conditions of the study area, including the identification of preferential groundwater pathways in the context of fractured and porous aquifer systems and delimitation of contamination plumes during the stages of characterization and monitoring of impacted sites [65][66][67].…”

Section: Methodsmentioning

confidence: 99%

Hydrogelogical characterization of a waste rock pile and bedrock affected by acid mine drainage from geophysical survey

et al. 2020

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Mining activities are known for the profound changes they cause in the environment, especially those related to environmental liabilities generated by these enterprises. One major concern of this sector relies on the acid mine drainage (AMD) process, which is formed by the exposure of sulfide minerals to oxidizing conditions. As a result, the production of low-pH saline waters favors the mobilization of heavy metals to the environment. In the last decades, the characterization and monitoring of contamination plumes have become more feasible due to the application of geophysical tools, more precisely the DC resistivity geophysical method. Thus, the aim of the present study is the application of electrical resistivity tomography to understand the hydrogeological dynamic of a waste rock pile in the Osamu Utsumi uranium mine, with the identification of preferred groundwater and AMD flow. The analysis of the 2D geophysical products allowed the differentiation of high salinity water accumulation zones (< 40 Ω m) in the interior of the pile. Likewise, the evaluation of the pseudo-3D model generated by the interpolation of 2D sections was crucial for the recognition of low resistivity zones within the bedrock, possibly controlled by fractures that work as recharge zones between the waste rock pile and the fractured aquifer. The identification of discharge and recharge zones related to the fractures system is a fundamental step for planning and actions to prevent water-sulfides interaction process, which is responsible for the generation of AMD, and also the installation of groundwater pumping systems.

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Section: Methodsmentioning

confidence: 99%

Hydrogelogical characterization of a waste rock pile and bedrock affected by acid mine drainage from geophysical survey

et al. 2020

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“…The 3D visualization models generated from geophysical data are great to help understanding complex geological structures and hydrological problems, like the pollutants flow and modeling ore deposits (Chambers et al, 2006;Aizebeokhai et al, 2011;Moreira et al, 2016;Moreira et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

Geophysical Study in A Diesel Contaminated Area due to A Railway Accident in Cerquilho (SP, Brazil)

Moreira¹,

Junqueira²,

Casagrande³

et al. 2019

Braz J Geophys

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ABSTRACT.In São Paulo State, there are hundreds of contaminated areas due to leakage of hydrocarbons in gas stations, industry or transportation. Chemicalcompounds transportation is a high-risk activity in function of the unpredictability of accidents. The integration between geophysical data and soil/groundwater chemicalanalyzes provides a comprehensive and appropriate view to the management and monitoring of contaminated areas. This paper brings a set of geochemical data andgeophysical diagnosis acquired in a diesel-contaminated area due to a railroad accident in 2002, during the transport of fuels in Cerquilho, São Paulo State. Furthermore,the site was still affected by the contamination when the geophysical acquisition was performed. DC Resistivity and Induced Polarization were performed, using electricaltomography technique. High chargeability values (2.97 mV/V) were associated with the neoformation of sulfides and hydroxides minerals in the unsaturated zone dueto hydrocarbon degradation. Furthermore, the resistivity data indicated the presence of residual phase in the unsaturated zone by a heterogeneous pattern of anomalies.In addition, low resistivity values (<12Ω.m) in the saturated zone indicated a dissolved phase of the contaminant. The geophysical diagnosis of residual phases inhydrocarbon contamination are used as a subsidy to the proper planning of remediation techniques in aquifer systems.Keywords:leakage; hydrocarbon, residual phase, DC resistivity; induced polarization; remediation.RESUMO.No Estado de São Paulo existem centenas de áreas contaminadas por vazamento de hidrocarbonetos em postos de combustíveis, indústrias ou transporte,esta última de alto risco devido à imprevisibilidade dos acidentes. A integração de dados geofísicos com análises químicas proporciona uma visão abrangente eadequada ao estudo e monitoramento de áreas contaminadas. Este trabalho reúne um conjunto de dados geoquímicos e de diagnóstico geofísico, adquiridos numa áreacontaminada por diesel resultante de acidente ferroviário em 2002 no município de Cerquilho/SP, cuja contaminação ainda estava presente no período da investigaçãogeofísica. Foram realizados levantamentos de Eletrorresistividade e Polarização Induzida, por meio da técnica de tomografia elétrica. Altos valores de cargabilidade(2,97 mV/V) foram relacionados à neoformação de sulfetos e hidróxidos em ambiente insaturado, produtos da degradação dos hidrocarbonetos. Por outro lado, osdados de resistividade indicaram a presença de fase residual em zona insaturada através de um padrão heterogêneo, além de baixos valores de resistividade (<12Ω.m)em zona saturada do aquífero, o que indica uma fase dissolvida do contaminante. O diagnóstico geofísico de fases residuais em contaminações por hidrocarbonetospode servir de subsídio a planejamento adequado de técnicas de remediação em sistemas aquíferos.Palavras-chave:vazamento; hidrocarboneto; fase residual; eletrorresistividade; polarização induzida; remediação

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“…2.4 Research method Different technologies have been developed and applied in landfills to evaluate possible soil contamination owing to faults in the waterproofing system of its base (Moreira et al, 2018;Shu et al, 2018) or to evaluate the levels of contamination of the soil and groundwater, owing to percolation of the leachate in landfills without waterproofing (Xie et al, 2016;Akpan et al, 2018;Przydatek and Kanownik, 2019). Several tools and methods are needed to conduct each research, in this section the materials, methods and tools used, are briefly described.…”

Section: Advective-diffusion Transitionmentioning

confidence: 99%

The study of diffusion characteristics of soil bentonite to control contaminant transport

Mahallei

Badv

2021

WJE

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Purpose The purpose of this paper is to assess sand-bentonite liners (SBL) which could be used as hydraulic barriers with a controllable quality, relatively low cost and easy operation in solid waste landfills. Design/methodology/approach These barriers have been used successfully in various applications and have attracted much attention in a short period of time. The only precautionary use of SBLs is related to the change of their hydraulic properties in high alkaline chemical environments. The main reason for this phenomenon is the presence of high ion exchange minerals in bentonite. By exposure to these environments, it is also laid open to degradation of the montmorillonite microstructure leads to change in hydraulic behavior. Three different compounds were used for laboratory-scale SBL, and diffusion was considered as the dominant mechanism of contamination transmission in these liners. Chlorine ion has been used as pollutant, and its diffusion coefficient was determined in the tested SBLs. Findings The sample’s diffusion coefficient for the first experiment containing 3% bentonite and 97% Semnan sand were 2.5 × 10^(−9) (m^2/s) and 2.44 × 10 ^(−9) (m^2/s), respectively. Similarly, for two samples with 6% bentonite and 94% Semnan sand, this parameter was equal to 2.17 × 10 ^(−9) (m^2/s) and 2.22 × 10 ^(−9) (m^2/s) and for two samples with 3% agglacial clay, 12% bentonite and 85% Semnan sand was 5.55 × 10 ^(−10) (m^2/s) and 6.11 × 10 ^(−10) (m^2/s). These values correspond to the range reported in previous studies. Also, it was observed that with comparing the diffusion coefficients of test, it was concluded that with increasing bentonite, the molecular diffusion decreases significantly. Originality/value In this study, three laboratory samples with different percentages of bentonite, clay and sand were considered and the results obtained from the laboratory were compared with the results obtained from numerical modeling.

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Analysis of leaks from geomembrane in a sanitary landfill through models of electrical resistivity tomography in South Brazil

Cited by 20 publications

References 19 publications

Hydrogelogical characterization of a waste rock pile and bedrock affected by acid mine drainage from geophysical survey

Hydrogelogical characterization of a waste rock pile and bedrock affected by acid mine drainage from geophysical survey

Geophysical Study in A Diesel Contaminated Area due to A Railway Accident in Cerquilho (SP, Brazil)

The study of diffusion characteristics of soil bentonite to control contaminant transport

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