Electrocoagulation of bio-filtrated landfill leachate: Fractionation of organic matter and influence of anode materials

Dia, Oumar; Drogui, Patrick; Buelna, Gerardo; Dubé, Rino; Ihsen, Ben Salah

doi:10.1016/j.chemosphere.2016.10.092

Cited by 77 publications

(30 citation statements)

References 29 publications

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“…The soluble organic matter of the slurry collected from the controlled landfill of Guaratinguetá-SP is thus verified to be constituted by macromolecules with low polydispersity value, implying homogeneity of the carbonaceous matter molar mass. The low response from the 5.58 kDa molar mass (1.16 polydispersity) of that landfill leachate (landfill of about 30 years of age) is coherent with the literature values for stabilized cell leachates (Christensen et al, 1998;Pereira et al, 2007;Dia et al, 2017).…”

Section: Physicochemical Characterization Of the Untreated Landfill Ssupporting

confidence: 74%

“…Água vol. 13 n. 2, e2136 -Taubaté 2018 main components: aromatic rings deriving from lignin and nitrogen from microorganism proteins (Dia et al, 2017). These rings are linked among them, be they condensed or not.…”

Section: Elemental Analysis (Chn) Of the Slurry "In Natura"mentioning

confidence: 99%

“…The main mechanism for adsorbing pollutants (e.g. metals and pesticides) in organic matter dissolved in underground waters, including the class of humic acids, is ionic exchange involving the hydroxyl groups (3419 cm -1 transmittance band) and carbonyls from carboxylic acids (1,726 cm -1 ) (Dia et al, 2017;Van Turnhout et al, 2018). The analyses by nuclear magnetic resonance provide basic structural information on the organic matter found in the leachate under study, confirming and complementing the data presented by the FTIR technique.…”

Section: Physicochemical Characterization Of the Untreated Landfill Smentioning

confidence: 99%

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Characterization of controlled landfill leachate from the city of Guaratinguetá - SP, Brazil

Peixoto¹,

Salazar²,

Barboza³

et al. 2018

Rev. ambiente água

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This research evaluated the physicochemical parameters of a leachate sample from a controlled landfill in the city of Guaratinguetá-SP. The evaluation was conducted using spectrometric and spectrophotometric methods in order to assess the formation of persistent compounds. The selection of parameters was based on the CETESB Article 18 and CONAMA 357/05 Article 34, as well as organic characterization methods, such as FTIR, NMR (1H-NMR, 13C-NMR and APT), GC-MS, molar mass distribution and elemental analysis (CHN). Chemical and physical stability were also verified. The ammoniacal nitrogen concentration is 20 times greater than tolerance limit established by law (20 mg L -1 ). The Ba and Ni presented concentrations above those permitted by the legislation (CETESB Article 18 and CONAMA 357/05 Article 34). Those values of chemical oxygen demand (COD) and total organic carbon (TOC) were 1013 mg L -1 and 286 mg L -1 , respectively. It was not possible to determine the biochemical oxygen demand (BOD) of slurry sample. In this sense, the biodegradability parameter for the slurry studied was Non-Determinable (ND), indicating that the organic matter of the slurry studied is recalcitrant. Recalcitrant humic substances of landfill leachate the present low polydispersity. These refractory acids play a detached role in carrying pollutants in the environment with regard to carrying toxic metals and pesticides. Finally, it was possible to verify that the humic acids' complexing capacity indicates that hydroxyl and carboxyl groups may exist in larger quantities than the nitrogen and sulfur groups. Further, the high content of metals may indicate that the waste was not properly separated.

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Section: Physicochemical Characterization Of the Untreated Landfill Ssupporting

confidence: 74%

Section: Elemental Analysis (Chn) Of the Slurry "In Natura"mentioning

confidence: 99%

Section: Physicochemical Characterization Of the Untreated Landfill Smentioning

confidence: 99%

See 1 more Smart Citation

Characterization of controlled landfill leachate from the city of Guaratinguetá - SP, Brazil

Peixoto¹,

Salazar²,

Barboza³

et al. 2018

Rev. ambiente água

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“…Electro-coagulation process (ECP) includes the generation of coagulants in situ by dissolving electrically iron ions in iron electrodes. The basic reactions that occur in an EC cell are described in the following reactions (Dia et al 2017):…”

Section: Introductionmentioning

confidence: 99%

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

et al. 2019

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This study aims to evaluate the degradation and mineralization of Malachite Green (MG) in an electro-Fenton process (EFP). We studied the influence of several important parameters including solution pH (2-11), current density (0-20 mA/cm 2), H 2 O 2 concentration (0-200 mg/L) and MG concentrations (200, 600, 1000, 1500, 2000, 3000 mg/L) at different reaction time (2.5-30 min). The intermediates produced during the degradation were determined by GC-MS. The optimum pH, current density and H 2 O 2 concentration were found to be approximately 3, 10 mA/cm 2 and 50 mg/L, respectively. It was concluded that acidic pH was required to increase the efficiency of the EFP. At optimum conditions and a reaction time of 15 min, MG was completely removed without any significant variation in the corresponding maximum wavelengths or new absorption bands. Due to formation of intermediates, almost all the organic compounds were completely mineralized (95.3%) to CO 2 and water at reaction time of 30 min. Results indicated the effect of hydroxyl radical (• OH) on MG degradation is greater than that of superoxide radical scavenger (O ⋅− 2). The results showed that the degradation process of MG followed pseudo-firstorder kinetic model and the treatment time required in EFP was 4.6 times lower than ECP. Furthermore, the results showed that EFP was an extremely efficient process for degradation and mineralization of a high concentration of MG (1000 mg/L) at a short reaction time (30 min).

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“…The hydrogen gas released from cathode would also help to float the flocculated particles out of the water [8]. Electrocoagulation process is a consistent and coast effective method with low amount of sludge and without any sensitivity to toxic materials.…”

Section: Introductionmentioning

confidence: 99%

Treatment of landfill leachate by electrocoagulation using aluminum electrodes

Taqwa

Syakdani

2017

MATEC Web Conf.

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Abstract. Leachate is wastewater decomposition of organic waste that can contaminate soil and groundwater if it is not handle properly. Contamination by leachate can be be prevented by reducing leachate level before the wastewater reaches the ground. One of the methods used is electrocoagulation. Electrocoagulation is an electrochemical water treatment method where in anoda occured the release of active coagulant as metalic ion, while in cathode occured the electrolysis reaction in a form of the release of hydrogen gas. This study is objected to investigate the effectiveness of electrocoagulation in removing Biochemical Oxygen Demand (BOD 5 ), Chemical Oxygen Demand (COD), NH 3 -N and lead (Pb) of leachate. In this research, the processing of leachate with electrocoagulation method using aluminum electrode has been proceed with the dimension of electrode 16.5 cm x 7 cm x 0.2 cm. Optimum conditions and the effectiveness of electrocoagulation for each parameter are in the current density 30 A/m 2 with 60 minutes of time process. The electrocoagulation method is effectively reduced the value of TSS 46.80%; BOD 5 71.33%; COD 73.77%; Pb 62.5%; NH 3 -N 57.92%; and for the increased of pH from 8.03 to 8.95, respectively. Electrocoagulation method are successfully reduced the levels of pollutants in accordance with environmental standard.

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Electrocoagulation of bio-filtrated landfill leachate: Fractionation of organic matter and influence of anode materials

Cited by 77 publications

References 29 publications

Characterization of controlled landfill leachate from the city of Guaratinguetá - SP, Brazil

Characterization of controlled landfill leachate from the city of Guaratinguetá - SP, Brazil

Electro-Fenton method for the removal of Malachite Green: effect of operational parameters

Treatment of landfill leachate by electrocoagulation using aluminum electrodes

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