Biogeochemistry of landfill leachate plumes

Christensen, Thomas Højlund; Kjeldsen, Peter; Bjerg, Poul Løgstrup; Jensen, Dorthe Lærke; Christensen, Jesper B.; Baun, Anders; Albrechtsen, Hans‐Jørgen; Heron, Gorm

doi:10.1016/s0883-2927(00)00082-2

Cited by 1,185 publications

(810 citation statements)

References 189 publications

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“…Isto justifica talvez, as altas concentrações encontradas no poço localizado sobre o antigo depósito de lixo (PM-5). O avanço desses elementos com a frente de invasão da pluma pode ser mais lento devidoàs reações ocorrentes próximo ao aterro (Christensen et al, 2001).…”

Section: Investigação Da Qualidade Daságuasunclassified

“…Naságuas superficiais, em R-5 as concentrações estão normais, entretanto em R-6 e R-7, os valores desteânion estão bem acima dos valores limites, fato que caracteriza a contaminação originada dos depósitos de lixo e dos despejos do curtume. Oíon sulfato, cujos valores estão fortemente alterados no poço PM-5, tem sido detectado em elevadas concentrações em lixiviados de depósitos de lixo (Christensen et al, 2001).…”

Section: Investigação Da Qualidade Daságuasunclassified

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Estrutura elétrica da contaminação hídrica provocada por fluidos provenientes dos depósitos de lixo urbano e de um curtume no município de Alagoinhas, Bahia

Pereira¹,

Lima²

2007

Rev. Bras. Geof.

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ABSTRACT.The actual sanitary landfill deposit of Alagoinhas county was constructed at the neighborhood of an old city dump and of a large tannery industry. Such dangerous pollution sources are located above the recharge area of the São Sebastião aquifer, one the most important water reservoirs of Bahia state, being exploited to supply human and animals populations in the county, irrigated agricultures and industries. To characterize the hydrological and environmental changes generated both by landfill leachates and tannery byproducts we applied electrical geophysical surface measurements combined with water samples physical chemistry analysis. The results of 49 vertical electrical soundings were used to delineate a three-dimensional conductive anomaly, which extends from the water table (about 10 m depth), to more than 40 m in depth. Such anomaly is interpreted as a result from the invasion of aqueous fluids derived from the garbage deposits and from the tannery decantation lagoon into the upper phreatic, regional aquifer of the area. Water analysis were made in six water wells and in three surface water samples collected in the Sauípe river and at one of its tributary, were industrial effluents are being disposed. The results reveal an extensive contamination of the groundwater and surface waters within the studied area. It has growth above the standard limits in the concentrations of Chromium Cr(III), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Ammonia (NH3) and total Nitrogen (N) and Phosphorus (P), suspended and dissolved solids, and cations Na, K, Mg, Ca, and anions Cl and SO 4 .Keywords: Vertical Electrical Soundings (VES); water contamination; leachate landfill; tannery. RESUMO.O atual aterro sanitário do município de Alagoinhas foi construído nas vizinhanças do antigo depósito de lixo da cidade e de uma grande indústria de couros. Tais fontes perigosas de poluição estão situadas sobre umaárea de recarga do aqüífero São Sebastião, um dos mais importantes reservatórios deágua doce do estado da Bahia, queé intensivamente explorado para suprimento das populações humanas e animais, irrigação e indústrias. Uma caracterização das alterações hidrológicas e ambientais geradas pela presença dos depósitos de lixo e da indústria de couros foi realizada por meio da aplicação de métodos geofísicos elétricos combinados com análises físico-químicas de amostras deáguas. Os resultados interpretados de 49 sondagens elétricas verticais (SEVs) executadas naárea mostraram a presença de uma anomalia condutiva tridimensional, que se estende desde a superfície até mais de 40 m de profundidade. Estaé interpretada como resultante da invasão de líquidos originados dos depósitos de lixo e da lagoa de rejeito do curtume. Uma investigação da qualidade daságuas realizada a partir de coletas em poços e no rio Sauípe e seu afluente, onde são lançados os efluentes da indústria, confirma os resultados da investigação geoelétrica. Detectamos alterações nas concentrações de cromo trivalente, demandas química e bioquímica d...

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Section: Investigação Da Qualidade Daságuasunclassified

Estrutura elétrica da contaminação hídrica provocada por fluidos provenientes dos depósitos de lixo urbano e de um curtume no município de Alagoinhas, Bahia

Pereira¹,

Lima²

2007

Rev. Bras. Geof.

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“…Ammonia typically accumulates in leachate because there is no mechanism for its biodegradation under methanogenic conditions. Some have suggested that ammonia is the most significant long-term pollution problem at landfills (11,15,17,18). Calculations of potential ammonia volatilization from landfills indicate that this mechanism can account for less than a 10% loss.…”

Section: Characteristics Of Leachate From Well-decomposed Refusementioning

confidence: 99%

“…Data on the presence and concentration of XOCs in leachate have been summarized (10). The XOCs that are most frequently present in landfill leachate are aromatic hydrocarbons (benzene, toluene, ethylbenzene, and xylenes) and chlorinated solvents (e.g., trichloroethene) (11). The concentrations of specific XOCs in leachate vary between landfills, though individual XOC concentrations are generally less than 1 mg/L.…”

Section: Characteristics Of Leachate From Well-decomposed Refusementioning

confidence: 99%

“…There is also evidence that some portion of these pollutants can be biodegraded under anaerobic conditions using nitrate, solidphase iron and manganese, sulfate or carbon dioxide as terminal electron acceptors. However anaerobic biodegradation rates for these pollutants are often slow, and the extent of biodegradation can vary depending on the site-specific groundwater geochemistry and contaminants present in the leachate (11). In addition, anaerobic degradation processes can have a variety of undesirable side effects, including production of dissolved manganese, iron, sulfide, taste, and odors.…”

Section: Groundwater Quality Impacts Of Landfill Leachatementioning

confidence: 99%

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Critical Evaluation of Factors Required To Terminate the Postclosure Monitoring Period at Solid Waste Landfills

Barlaz

Rooker

Kjeldsen

et al. 2002

Environ. Sci. Technol.

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107

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Regulations governing the disposal of solid waste in landfills specify that they must be monitored for 30 years after closure unless this period is extended by the governing regulatory authority. Given the wide range of conditions under which refuse is buried, technical criteria, rather than a specific time period, are preferable for evaluation of when it is acceptable to terminate postclosure monitoring. The objectives of this paper are to identify and evaluate parameters that can be used to define the end of the postclosure monitoring period and to present a conceptual framework for an investigation of whether postclosure monitoring can be terminated at a landfill. Parameters evaluated include leachate composition and leachate and gas production. Estimates of leachate production from closed landfills are used to assess the potential environmental impacts of a hypothetical release to surface water or groundwater. The acceptability of gaseous releases should be evaluated against criteria for odors, the potential for subsurface migration, and greenhouse gas and ozone precursor emissions. The approach presented here must be tested on a site-specific basis to identify additional data requirements and regulatory activity that might be required to prepare regulators for the large number of requests to terminate postclosure monitoring expected over the next 20 years. An approach in which the frequency and extent of postclosure monitoring is reduced as warranted by site-specific data and impact analysis should provide an effective strategy to manage closed landfills.

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Groundwater Microbial Communities

McKinley

Fredrickson

Colwell

2005

Encyclopedia of Hydrological Sciences

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Microbial communities in aquifers consist of diverse interactive individuals which break down complex organic matter for metabolic energy. Microbes are adapted to function over environmental conditions ranging from freezing to boiling, acidic to alkaline. They can use oxygen as a reducible metabolite during organic carbon oxidation, but, since oxygen is rapidly depleted in subsurface environments, different groups of organisms may also rely upon other compounds such as reducible metals or upon fermentation. Community members are interdependent, but compete for resources, and communities often have predominant groups that rely on recognizable chemical pathways such as sulfate reduction. The predominant group varies spatially and temporally, as the available nutrients change or are depleted.

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Biogeochemistry of landfill leachate plumes

Cited by 1,185 publications

References 189 publications

Estrutura elétrica da contaminação hídrica provocada por fluidos provenientes dos depósitos de lixo urbano e de um curtume no município de Alagoinhas, Bahia

Estrutura elétrica da contaminação hídrica provocada por fluidos provenientes dos depósitos de lixo urbano e de um curtume no município de Alagoinhas, Bahia

Critical Evaluation of Factors Required To Terminate the Postclosure Monitoring Period at Solid Waste Landfills

Groundwater Microbial Communities

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