Ecotoxicological assessment and evaluation of a pine bark biosorbent treatment of five landfill leachates

Ribé, Veronica; Nehrenheim, Emma; Odlare, Monica; Gustavsson, Lillemor; Berglind, Rune; Forsberg, Åke

doi:10.1016/j.wasman.2012.05.011

Cited by 37 publications

(11 citation statements)

References 25 publications

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“…Additionally, these materials offer an interesting advantage, which is their capacity to work as low cost bio-sorbents [19,20]. Ribé et al [21] observed that pine bark was able to efficiently remove heavy metals from landfill leachates. Gao et al [22] studied a 600 m 2 VF and with a substrate that contained about 37% organic matter including wood turf, organic compost, activated sludge and pine bark.…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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Abstract:A hybrid constructed wetland mesocosm has been used for the treatment of raw urban wastewater. The first stage was a mulch-based, subsurface, horizontal flow constructed wetland (HF). The HF achieved good removals of COD (61%; 54 g/m 2 ·day) and Total Suspended Solids (84%; 29 g/m 2 ·day). The second stage was composed of vertical flow constructed wetlands (VF) that were employed to study the effect of substrate (gravel vs. mulch), feeding mode (continuous vs. intermittent) and the number of stages (1 vs. 2) on performance. High hydraulic and organic surface loadings (513-583 L/m 2 ·day and 103-118 g/m 2 ·day of COD) were applied to the reactors. The mulch was more efficient than gravel for all the parameters analyzed. The continuous feeding allowed a 3 to 6-fold reduction of the surface area required.

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Section: Introductionmentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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“…Leachate is characterized by high levels of chemical and biochemical oxygen demands (COD and BOD 5 ) for landfills with less than two years, and low biodegradability for mature landfills with more than ten years. 1,2 These effluents are characterized by a dark color and presence of large amounts of suspended solids, ammonia, inorganic ions (chloride, sulfate, etc.…”

Section: Introductionmentioning

confidence: 99%

Strategy for Treating a Landfill Leachate by Integration of Physico-Chemical and Photo-Fenton Processes

Silva¹,

Júnior²,

Silva³

et al. 2017

J. Braz. Chem. Soc.

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This study reports a protocol for the treatment of a sanitary landfill leachate through integration between a stage of coagulation-flocculation, a step of filtration of the resulting suspension, and application of the photo-Fenton process using a ferrioxalate complex and solar irradiation. The best results for turbidity removal by coagulation-flocculation were reached using Al 3+ as nitrate salt mainly using concentrations up close 4.4 mmol L -1 , at the natural pH of the effluent (pH 7.9), when the removal of 66% of the turbidity was achieved. By using a ferrioxalate complex after adjusting the pH of the effluent to 5, it was possible to circumvent the classical limitations of the Fenton process (related to the pH of the medium limited to between 2.5 and 3.0), performing a removal of 68% of the remaining dissolved organic carbon. The global dissolved organic carbon removal in this process was of 86% after a membrane filtration step before the photo-Fenton process.

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“…The microcrustaceans Daphnia magna and Daphnia pulex have these characteristics (Barata et al, 2006). Isidori et al (2003), Cho et al (2009), Jemec et al (2012, Ribé et al (2012) and Rivera-Laguna et al (2013) have performed specific studies of ecotoxicity with leachates, finding that the use of these organisms presents significant financial and logistical advantages compared to other organisms such as fishes. In addition, the studies show that variables associated with the age and composition of the leachates, such as the pH, alkalinity, and concentration of carbonaceous and nitrogenous organic matter, heavy metals, etc., influence toxicity.…”

Section: Introductionmentioning

confidence: 99%

Determination of leachate toxicity through acute toxicity using Daphnia pulex and Anaerobic Toxicity Assays

Lozada

Rivera

2017

ing.inv.

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The municipal solid waste (MSW) of large cities, in particular the ones of developing countries, is mainly disposed in landfills (LFs), whose inadequate management generates the emission of greenhouse gases and the production of leachates with high concentrations of organic and inorganic matter and, occasionally heavy metals. In this study, the toxicity of the leachates from an intermediate-age municipal landfill was evaluated by ecotoxicity and anaerobic toxicity tests. The acute toxicity assays with Daphnia pulex presented a toxic unit (TU) value of 49,5%, which indicates that these leachates should not be directly discharged into water sources or percolate into the soil because they would affect the ecosystems related to these waters. According to statistical analyses, the leachate toxicity is mainly associated with the inorganic fraction, having the chlorides, calcium hardness and, calcium as the greatest influences on the toxicity. The anaerobic toxicity test showed that in the exposure stage, the methanogenic activity exceeded the control one, which suggests that the anaerobic bacteria easily adapted to the leachate. Therefore, this treatment could be an alternative to mitigate the toxicity of the studied leachates. The inhibition presented in the recovery stage, represented by a reduction of the methanogenic activity, may be because the amount of supplied substrate was not enough to fulfill the carbon and nutrient requirements of the bacterial population present.Keywords: Daphnia pulex, leachate, municipal landfill, anaerobic toxicity. RESUMENLos residuos sólidos municipales (RSM) de las grandes urbes, en particular las de países en desarrollo, son predominantemente arrojados en rellenos sanitarios (RS), cuyo manejo inadecuado genera la emisión de gases de efecto invernadero y la producción de lixiviados con altas concentraciones de materia orgánica e inorgánica y, ocasionalmente, de metales pesados. En este estudio se evaluó la toxicidad de los lixiviados de un relleno sanitario municipal de edad intermedia, mediante ensayos de ecotoxicidad y de toxicidad anaerobia. Los ensayos de toxicidad aguda con Daphnia pulex presentaron valores de UT de 49,5%, lo que indica que estos no deben ser vertidos directamente a fuentes de agua ni deben percolar en el suelo, pues afectarían los ecosistemas que se sirvan de estas aguas. De acuerdo con los análisis estadísticos, la toxicidad del lixiviado está asociada principalmente a la fracción inorgánica, siendo los cloruros, la dureza cálcica y el calcio los parámetros de mayor influencia. Los ensayos de toxicidad anaerobia mostraron que en la etapa de exposición la actividad metanogénica superó a la del control, lo que sugiere que las bacterias anaerobias se adaptaron fácilmente al lixiviado y, por lo tanto, esta puede ser una alternativa de tratamiento para mitigar la toxicidad de los lixiviados estudiados. La inhibición presentada en la etapa de recuperación, representada en una reducción de la actividad metanogénica, puede deberse a que la cantidad de sustrat...

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Ecotoxicological assessment and evaluation of a pine bark biosorbent treatment of five landfill leachates

Cited by 37 publications

References 25 publications

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Strategy for Treating a Landfill Leachate by Integration of Physico-Chemical and Photo-Fenton Processes

Determination of leachate toxicity through acute toxicity using Daphnia pulex and Anaerobic Toxicity Assays

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