Electrocoagulation treatment of raw landfill leachate using iron-based electrodes: Effects of process parameters and optimization

Sahari, Noorul Huda; Raman, Abdul Aziz Abdul; Bello, Mustapha Mohammed; Ramesh, S.

doi:10.1016/j.jenvman.2017.08.028

Cited by 108 publications

(45 citation statements)

References 31 publications

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“…EC has been successfully used for the removal of oil and grease from biodiesel wastewater, with a removal efficiency as high as 98.42% . Similar successful results were obtained from treatment of antibiotics, textile wastewater phosphate from surface water, lead, landfill leachate, phenolic compounds, and heavy metals …”

Section: Introductionsupporting

confidence: 52%

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Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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The objective of this study is to determine the optimum parameters of electrocoagulation process in treatment of boron in low concentrations. Especially, studies on electrode optimization in low boron concentrated waters are insufficient. Therefore, the effect of electrode combination (Al–Al, Al–Fe, Al–SS, Fe–Al, Fe–Fe, and Fe–SS), pH (5–9), current density (8–24 mA cm −2 ), distance (1–3 cm), and electrolysis time (10–90 min) on treatment of boron containing wastewater is studied to obtain maximum removal efficiency. The maximum removal efficiency of boron is obtained as 95.6%. Operation conditions for maximum removal are the electrode combination of Fe–Al, current density of 16 mA cm −2 , pH 7.0, concentration of 30 mg L −1 and the reaction time of 70 min. Operating cost of the electrocoagulation process is calculated as 2.35 $ m −3 . This study indicates that the electrocoagulation process can be successfully applied in order to treat boron‐polluted wastewaters at low initial concentrations.

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Section: Introductionsupporting

confidence: 52%

“…Reactions that occur at the anode and cathode electrodes for aluminum and iron electrodes in an EC cell are described in Equations – …”

Section: Introductionmentioning

confidence: 99%

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Deniz

Akarsu

2018

Global Challenges

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“…The worldwide wastewater discharge regulations and standards have become stricter; hence, there is an urgent need to find an effective LL treatment method. Many researchers are investigating new and effective methods for LL treatment, such as sorption on magnetic particles [2] and other sorbents [8], reactive granular filters [9], the use of metallic iron [4,10,11] and other heterogeneous catalysts [12,13], Fenton (classical and solar) [14][15][16][17], electro-Fenton [18,19], and other electrochemical processes [11,[20][21][22][23][24], usage of different oxidants and their combination [25,26], microwaves [10], ultrasounds [27], membrane processes [28], hydrodynamic cavitation [29], microalgae [30], biofiltration [21,31], supercritical water oxidation [32], oscillating biological membrane photoreactors [33], anaerobic digestion [27,34], dynamic membrane bioreactors [35], bio-electro-Fenton [36], upflow sludge bed reactors [37], moving bed biofilm reactors [38], and the sequencing batch reactor [39]. Moreover, a few review articles have summarized the LL treatment methods [40][41][42]…”

Section: Introductionmentioning

confidence: 99%

Treatment of Landfill Leachates with Combined Acidification/Coagulation and the Fe0/H2O2 Process

Bogacki

Marcinowski

El-Khozondar

2019

Water

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One of the major environmental concerns associated with waste disposal is the large amount of generated landfill leachates (LL), which are considered a type of wastewater with a complex composition. There is an urgent need to find an effective LL treatment method. LL were subjected to pretreatment followed by the Fe0/H2O2 process. Pretreatment efficiency was coagulation at pH 6.0 >> coagulation at pH 9.0 > acidification at pH 3.0. Coagulation at pH 6.0 in an optimal Fe3+ dose of 1000 mg/L decreased total organic carbon (TOC) from the initial concentration of 1061 mg/L to 491 mg/L while acidification to pH 3.0 decreased TOC to 824 mg/L. After acidification, the Fe0/H2O2 process with 8000/9200 mg/L Fe0/H2O2 reagent doses decreased TOC to 499 mg/L after a processing time of 60 min. Performance of the Fe0/H2O2 process after coagulation at pH 6.0 for optimal Fe0/H2O2 8000/5540 mg/L reagent doses decreased TOC to 268 mg/L (75% TOC removal). Treatment of landfill leachates with combined process coagulation and Fe0/H2O2 also increased their susceptibility to biodegradation, expressed as the biochemical oxygen demand/chemical oxygen demand (BOD5/COD) ratio from 0.13 to 0.43, allowing LL to be considered as susceptible to biodegradation. Fe0/H2O2 process kinetics was described. A statistical analysis confirmed the obtained results. The proposed method can be successfully applied for LL treatment.

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“…The main advantage of using RSM for designing experiments is that it allows us to study interactions among different variables and optimize the specified response with a limited number of planned experiments [11]. It has been used to optimize electrocoagulation process with drinking water using a new flow column electrocoagulation reactor [12], chicken processing industry wastewater [13], palm oil mill effluent [14], raw landfill leachate [15], and molasses wastewater [16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of electrocoagulation process for fluoride removal: a blending approach using gypsum plaster rich wastewater

Jadhao

Kodape

Junghare

2019

Sustain Environ Res

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A novel blending approach has been introduced for fluoride removal by means of electrocoagulation. A blend was prepared by mixing synthetic phosphoric acid plant wastewater and gypsum plaster (GP) rich wastewater. This study explores defluoridation of wastewater using the simultaneous effect of chemical precipitation and electrocoagulation. Fourier transform infrared spectroscopy analysis of sludge confirms the presence Ca-F bond, which proves that enhancement in fluoride removal with blending of GP rich wastewater is due to simultaneous action of chemical precipitation and electrocoagulation. Optimization and statistical modeling were done with the help of MINITAB 17 software. Response surface methodology was performed using Box-Behnken Design to predict the fluoride removal efficiency and energy consumption. R 2 values of 0.9485 and 0.9998 shows a good agreement between experimental and predicted values of responses. Kinetic study was done to determine the rate constant and it is found out that fluoride removal follows second order kinetic model. Blending approach confirmed the assistive role of GP rich wastewater in the enhancement of fluoride removal efficiency.

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Electrocoagulation treatment of raw landfill leachate using iron-based electrodes: Effects of process parameters and optimization

Cited by 108 publications

References 31 publications

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Operating Cost and Treatment of Boron from Aqueous Solutions by Electrocoagulation in Low Concentration

Treatment of Landfill Leachates with Combined Acidification/Coagulation and the Fe0/H2O2 Process

Optimization of electrocoagulation process for fluoride removal: a blending approach using gypsum plaster rich wastewater

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