Mineralization of Hazardous Waste Landfill Leachate using Photo-Fenton Process

Singa, Pradeep Kumar; Isa, Mohamed Hasnain; Ho, Yeek‐Chia; Lim, Jun-Wei

doi:10.1051/e3sconf/20186505012

Cited by 9 publications

(4 citation statements)

References 14 publications

(14 reference statements)

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“…A previous report by Zhang et al [39] showed COD removal from landfill leachate was only 65% when hydrogen peroxide alone was applied, with the presence of ferrous ion greatly improving COD removal. Singa et al [40] observed that the maximum COD removal from landfill leachate by using photo Fenton was 68% under optimum operating conditions. Also, Singa et al [41] found that under favorable experimental conditions, maximum COD removal from landfill leachate by using Fenton process was 56.49%.…”

Section: Response Optimisation and Validation Of The Experimental Modelmentioning

confidence: 99%

Removal of COD from landfill leachate by Predication and Evaluation of Multiple Linear Regression (MLR) Model and Fenton process

et al. 2019

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M UNICIPAL Solid Waste (MSW) landfill leachate contains highly concentrated organic substances which are hazardous to the environment. Therefore, it must be treated before discharged into water bodies and suitable techniques are essential for effective treatment. In this regard, multiple linear regression (MLR) model has shown to be a favorable technique for optimization of landfill leachate treatment. In this study, four operational variables, H 2 O 2 :Fe 2+ ratio, pH, reaction time, and Fe 2+ concentration, were assessed using the model. The chemical oxygen demand (COD) removal was 96.43% by experiment, while the predicted assessment was 100% under the optimized settings; time = 33.87 min, concentration of Fe 2+ = 749.64 mg/L, pH = 3, and ratio of H 2 O 2 :Fe 2+ = 2 during Fenton treatment. The high value of the coefficient of determination, R 2 = 0.896, designates a resilient relationship between the experimental and model values. The residual study (residual plot) specified that the points were randomly distributed, confirming the appropriateness of the model. The MLR model established may possibly be used for assessment of other landfill leachate treatment.

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Section: Response Optimisation and Validation Of The Experimental Modelmentioning

confidence: 99%

Removal of COD from landfill leachate by Predication and Evaluation of Multiple Linear Regression (MLR) Model and Fenton process

et al. 2019

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“…Therefore, advanced oxidation processes (AOP) such as photo-Fenton (UV/H 2 O 2 +Fe 2+ ), electro-Fenton, ozone (O 3 ) oxidation, oxidation O 3 +UV, O 3 +UV+H 2 O 2 , percarbonate oxidation or the Fenton process (H 2 O 2 +Fe 2+ ) are increasingly applied. In view of, inter alia, the wide range of application, the high non-selectivity of the • OH, and the simplicity of running the process, the Fenton process is the most popular of the AOP methods, and its main disadvantage is the generation of sediments which need to be properly managed [2,5,6,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Fenton Process Optimization with Landfill Leachate in Janczyce as an Example

Muszyńska¹,

Bąk²,

Górski³

et al. 2021

Pol. J. Environ. Stud.

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One of the advanced oxidation methods is the Fenton's reaction which uses a mixture of iron(II) and hydrogen peroxide to generate hydroxyl radicals. The Fenton process efficiency is influenced by a number of factors including the pH, the Fe 2+ :H 2 O 2 relation or the Fe 2+ dose. The aim of the study was to optimize the Fenton method in the application for landfill leachate treatment, with the landfill in Janczyce (Świętokrzyskie Voivodeship) as an example. The sequence of determining the most advantageous conditions for the use of Fenton's reagent was as follows: A -the pH effect; B -the oxidation time effect; C -the Fe 2+ :H 2 O 2 relation effect; D -the Fe 2+ dose effect. The optimum catalyst/oxidant ratio of 0.125 was determined. The optimum process time of 90 minutes was determined. It was demonstrated that the Fenton process can be effectively carried out already at the pH of 4. A reduction by 75% for the TOC and by 89% for the COD, respectively, was obtained.

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“…An improvement of this conventional Fenton reaction consists in using UV radiation to reduce Fe 3+ to Fe 2+ , that is, the so-called photo-Fenton process [18][19][20][21], which enables the iron oxidation cycle to be produced again, generating more hydroxyl radicals capable of further oxidizing the remaining organic matter. As a result, it is necessary to add less iron to catalyze the process, and the production of iron sludge is minimized [22].…”

Section: Introductionmentioning

confidence: 99%

“…Different sources of UV radiation have already been assessed in their application to perform the photo-Fenton reaction, namely, high-pressure mercury-vapor immersion lamps [7,21], sunlight concentrated in compound parabolic collectors (CPC) [23,24], unconcentrated sunlight in thin film reactors [25], and light-emitting diodes (LEDs) [26]. In particular, Singa et al (2018) [21] addressed a 68% COD removal in 90 min of treatment using a 16 W high-pressure mercury-vapor immersion lamp to perform the photo-Fenton degradation of LL. Colombo et al (2019) [7] achieved an 89% COD removal in a similar photo-Fenton treatment of a sanitary LL, and the reported treatment efficiency increased up to the 98% removal of the COD when the oxidation process was combined with a posterior biological treatment.…”

Section: Introductionmentioning

confidence: 99%

UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

et al. 2021

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The objective of this trial was to assess the application of UVA-LED technology as an alternative source of irradiation for photo-Fenton processes, aiming to reduce treatment costs and provide a feasible treatment for landfill leachate. An optimized combination of coagulation with ferric chloride followed by photo-Fenton treatment of landfill leachate was optimized. Three different radiation sources were tested, namely, two conventional high-pressure mercury-vapor immersion lamps (100 W and 450 W) and a custom-designed 8 W 365 nm UVA-LED lamp. The proposed treatment combination resulted in very efficient degradation of landfill leachate (COD removal = 90%). The coagulation pre-treatment removed about 70% of the COD and provided the necessary amount of iron for the subsequent photo-Fenton treatment, and it further favored this process by acidifying the solution to an optimum initial pH of 2.8. The 90% removal of color improved the penetration of radiation into the medium and by extension improved treatment efficiency. The faster the Fenton reactions were, as determined by the stoichiometric optimum set-up reaction condition of [H2O2]0/COD0 = 2.125, the better were the treatment results in terms of COD removal and biodegradability enhancement because the chances to scavenge oxidant agents were limited. The 100 W lamp was the least efficient one in terms of final effluent quality and operational cost figures. UVA-LED technology, assessed as the application of an 8 W 365 nm lamp, provided competitive results in terms of COD removal, biodegradability enhancement, and operational costs (35–55%) when compared to the performance of the 450 W conventional lamp.

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Mineralization of Hazardous Waste Landfill Leachate using Photo-Fenton Process

Cited by 9 publications

References 14 publications

Removal of COD from landfill leachate by Predication and Evaluation of Multiple Linear Regression (MLR) Model and Fenton process

Removal of COD from landfill leachate by Predication and Evaluation of Multiple Linear Regression (MLR) Model and Fenton process

Fenton Process Optimization with Landfill Leachate in Janczyce as an Example

UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

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