Bioassays for toxicological risk assessment of landfill leachate: A review

Ghosh, Pooja; Thakur, Indu Shekhar; Kaushik, Anubha

doi:10.1016/j.ecoenv.2017.03.023

Cited by 169 publications

(78 citation statements)

References 94 publications

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“…It is defined by high concentrations of organic and inorganic compounds, derived mainly from the disposal of non-hazardous MSW, as well as toxic chemicals (Tsarpali et al, 2012). If a waste has a high content of organic fraction, leachate is characterized by a higher oxygen content and higher concentration of ammonium and organic nitrogen (Ghosh et al, 2017). But trace elements are the most toxic and / or problematic pollutants in leachate.…”

Section: Introductionmentioning

confidence: 99%

“…The oldest form of the removal and disposal of waste is landfilling (Vaverková et al, 2013;Vaverková and Adamcová 2014;Koda et al, 2015;Adamcová et al, 2016a;Ghosh et al, 2017) and landfills are broadly used methods for the disposal of MSW (Baderna et al, 2011;Tsarpali et al, 2012). Moreover, in the future, landfill will continue to be a major disposal option for MSW.…”

Section: Introductionmentioning

confidence: 99%

“…Commonly, assessment of leachate is based on identification of pollutants through chemical analyses (Ghosh et al, 2017), however, evaluation of leachate can be based also on the interactions with biota (Kjeldsen et al, 2002, Tsarpali et al, 2012. Actually, chemical analysis gives results about landfill leachate composition / pollution, while the toxicological tests, integrates the effect of all contaminants, providing information on their bioavailable fraction (Pandard et al, 2006;Kalcikova et al, 2011;Tsarpali et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in the future, landfill will continue to be a major disposal option for MSW. This method of waste disposal are known source of environmental pollution (Hu et al, 2017), and waste buried in landfill is subjected to a series of physico-chemical and biological transformations, generating potentially polluted water -leachate (Ghosh et al, 2017). Leachate may contaminate the groundwater as well as the surface waters (Gworek et.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes and Toxic Potency of Landfill Leachate for White Mustard (Sinapis alba L.)

Zloch¹,

Vaverková²,

Adamcová³

et al. 2018

Acta Univ. Agric. Silvic. Mendelianae Brun.

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Landfills are the most broadly used methods for the disposal of municipal solid waste (MSW). Leachate can be contaminated with pollutants that may pose a threat to the landfill surrounding namely soil, groundwater and surface waters.. Examination of leachate composition is determinative in long-term impact of landfills on the environment and human health. Moreover, it is essential to assess such prior knowledge for prevention of negative outcomes. The evaluation of the seasonal changes of landfill leachate and rainwater composition is presented in this paper. Research samples of leachate and rainwater were collected from February till June of 2017 (still ongoing) and analyzed for pH, electrical conductivity, dissolved oxygen, series of trace elements, Subsequently the test of leachate toxicity for higher plants (Sinapis alba L.) was carried out. Up to now, the results do not indicate significant seasonal difference in landfill leachate composition, however the toxicity tests provided on Sinapis alba L. demonstrate that landfill leachates can present a significant source of contamination. This research can serve practical tools for evaluating quality and risk assessment for landfill leachate.

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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

Seasonal Changes and Toxic Potency of Landfill Leachate for White Mustard (Sinapis alba L.)

Zloch¹,

Vaverková²,

Adamcová³

et al. 2018

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…Municipal solid waste management dumped inappropriately in nonengineered landfill sites generates highly contaminated wastewater called leachate [1]. Landfill leachate results from the degradation of the waste organic fraction in combination with percolation of rainwater through solid waste piles [2].…”

Section: Introductionmentioning

confidence: 99%

Landfill leachate treatment by batch supercritical water oxidation

Cardona¹,

Buitrago²,

Acosta

2017

Cien.Ing.Neogranadina

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were measured in the reactor effluent samples and the combined effect of the studied factors was analyzed by means of the Analysis of Variance (ANOVA). Optimal operation conditions for TOC destruction were 400°C, 30 min and 100 % OE, being 500°C, 30 min and 100 % OE for TN destruction. Contrary to what has been reported in similar studies, the results suggest that it is possible to accomplish the simultaneous TOC and TN destruction in leachate wastewater by SCWO treatment at 400°C, 100 % OE and residence times longer than 30 min and without using a catalyst, either in batch or in a continuous process, as long as both the oxidant and the wastewater are mixed and heated together at the reaction temperature.Keywords: Landfill leachate, SCWO, TOC destruction, Total Nitrogen destruction. rEsumENEl tratamiento de lixiviados por medio de diferentes procesos fisicoquímicos y biológicos ha sido ampliamente estudiado. Sin embargo, ningún proceso logra las eficiencias de destrucción requeridas en cuanto a materia orgánica y nitrógeno, razón por la cual el tratamiento se realiza por medio de tecnologías combinadas. La oxidación en agua supercrítica o SCWO, proceso que se lleva a cabo a temperaturas y presiones superiores a las del punto crítico del agua en presencia de una fuente de oxígeno, se ha aplicado exitosamente al tratamiento de distintos tipos de aguas residuales de forma eficiente. Por lo tanto, este trabajo presenta un estudio experimental de la oxidación en agua supercrítica de lixiviados de relleno sanitario en un reactor batch, en el rango de temperatura de 400-500°C, tiempos de reacción de 15 a 30 minutos y excesos de oxígeno (OE) de 100 % a 300 %. Se midieron las eficiencias de destrucción de carbono orgánico total (COT) y nitrógeno total (NT), y se determinó el efecto combinado de los factores estudiados por medio del Análisis de Varianza (ANOVA). Las condiciones de operación óptimas para la destrucción de COT fueron 400°C, 30 min y 100 % OE, y 500°C, 30 min y 100 % OE para el NT. A diferencia de lo reportado en estudios similares, los resultados sugieren que es posible llevar a cabo la destrucción simultánea del COT y el NT en los lixiviados por medio de SCWO a 400°C, 100 % OE y tiempos de residencia de más de 30 min sin usar un catalizador, ya sea en un proceso batch o continuo, siempre y cuando tanto el oxidante como el agua residual se mezclen y se calienten juntos a la temperatura de reacción.Palabras clave: Lixiviados, SCWO, destrucción de COT, destrucción de nitrógeno total.

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