Determination of organic compounds in landfill leachates treated by Fenton–Adsorption

Ramírez-Sosa, Dorian R.; Castillo-Borges, E.R.; Méndez-Novelo, Roger I.; Sauri-Riancho, María R.; Barceló‐Quintal, Manuel H.; Marrufo-Gómez, José M.

doi:10.1016/j.wasman.2012.07.019

Cited by 41 publications

(25 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, although the content of organic matter, expressed as COD, is high, the BOD 5 /COD ratio is low, which indicates the decreased biodegradability of the leachates with age and coincides with what has been found by authors including Fátima et al (2012) and Ramírez-Sosa et al, (2013).…”

Section: Resultssupporting

confidence: 87%

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

Lozada

Rivera

2017

ing.inv.

View full text Add to dashboard Cite

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...

show abstract

Section: Resultssupporting

confidence: 87%

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

Lozada

Rivera

2017

ing.inv.

View full text Add to dashboard Cite

show abstract

“…C/C 0 was always lower than 0,04, which indicates high CBB removing (95,9%). This percentage removal was similar to those found in studies where the hybrid photo-Fenton/adsorption process (Ramírez-Sosa et al, 2013;Almazán-Sánchez et al, 2014;Thankappan et al, 2014). A breakthrough curve usually presents a characteristic S shape, due to the mass transfer forces.…”

Section: Photo-fentonsupporting

confidence: 88%

“…Hybrid process, such as photo-Fenton followed by adsorption, has been reported efficiently for the complete removal and/or degradation of some wastewater compounds , such as the leather tanning agent syntan (Thankappan et al, 2014); methyl orange (Saldaña-Robles et al, 2014); organic compounds in landfill leachates (Ramírez-Sosa et al, 2013); methyl methacrylate (Almazán-Sánchez et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Photo-Fenton and Adsorption Combined Process for Degradation and Removing of Coomassie Brilliant Blue Dye From Aqueous Solution

Canteli¹,

Carpiné²,

Doná³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

View full text Add to dashboard Cite

RESUME -Coomassie Brilliant Blue (CBB) is a commonly dye present in the waste of the textile industry. Its use produces waste which must be treated before being discharged into rivers or sewage. Combined processes have been used with efficiency for wastewater treatment. This study aims to evaluate the combined process of photo-Fenton and adsorption for the degradation and removal of the dye CBB in aqueous solution. Initially, the CBB was submitted to photo-Fenton oxidation. Photo-Fenton oxidation degraded 76,9% of the initial CBB concentration, which was not enough to satisfies the Brazilian legislation. The fixedbed adsorption was conducted for 13 hours, and during all this period the outlet concentration was always lower than the breakpoint, being this concentration in compliance with the legislation. The combined photo-Fenton/Fixed-bed adsorption was effective in the CBB removing (at least 95,9%).

show abstract

“…2013; Oller et al . 2011) . In this context, the adsorption process makes it possible to remove these substances from the LL, enhancing its quality and reducing its toxicity (Poblete et al .…”

Section: Resultsmentioning

confidence: 99%

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Poblete

Cortés

Bakit

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

This study focuses on the removal of organic pollutants present in landfill leachate (LL) using an adsorption process with activated carbon (AC) obtained from fish scales, and subsequently evaluates the reduction of toxicity in the wastewater obtained from the process. The AC obtained is a mesoporous material, with a cumulative pore area of 1.57 m2 g−1, Brunauer–Emmett–Teller (BET) of 1.8329 m2 g−1 and adsorption average pore width of 12.79833 nm. The maximum removal of pollutants was achieved at natural pH (6.71) of the LL, with a load of 3 g L−1, resulting in 60.1% colour and 37.3% chemical oxygen demand (COD). The rate of COD removal per g of AC increase had a maximum value of 5.6 at pH 10 when passing from 0.5 to 1 g AC. The lowest rate of 0.6 occurred for the same pH when it passed from 1 to 2 g AC. At pH 3 the second lowest rate of 3.3 was observed when passing from 2 to 3 g AC. At pH 3 there was always an increase in the rate as more AC was added. Conversely, at natural pH 6.71 the rate tended to decrease. At pH 10 the rate first decreased and then increased. At acidic pH, because it is the one with the lowest COD removal, it would be expected that by adding more AC the rate would continue to increase as there are easily accessible sites still available. Langmuir isotherms fitted adequately with the experimental data, providing an R2 of 0.9657, which is consistent with a monolayer adsorption pattern. The LL before the adsorption process had an inhibition ratio of 20.4%, due to the fact that leachate can be toxic because of the presence of hazardous organic compounds. After adsorption processes at pH 6.71, the inhibition ratios were 16.9%, 13.8%, 12.2% and 10.9% at AC loads of 0.5, 1, 2 and 3 g L−1, respectively, due to decreasing COD and colour of the LL over the course of the treatment. It was observed that the reduction of the inhibition ratio was greater at higher loads of adsorbent. © 2020 Society of Chemical Industry

show abstract

Determination of organic compounds in landfill leachates treated by Fenton–Adsorption

Cited by 41 publications

References 23 publications

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

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

Photo-Fenton and Adsorption Combined Process for Degradation and Removing of Coomassie Brilliant Blue Dye From Aqueous Solution

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Contact Info

Product

Resources

About