Electrochemical Oxidation of Landfill Leachate after Biological Treatment by Electro-Fenton System with Corroding Electrode of Iron

Tang, Juan; Yao, Shuo; Xiao, Fei; Xia, Jianxin; Xing, Xuan

doi:10.3390/ijerph19137745

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…In order to treat landfill leachate, a number of traditional chemical and physical processes have been suggested, such as adsorption with different adsorbent (Detho et al, 2021; Elgarahy et al, 2023; Kumara & Dayanthi, 2023; J. Liu et al, 2024; Salama et al, 2022), ion exchange with various resins (Aziz et al, 2020; Bashir et al, 2010; Scandelai et al, 2020), reverse osmosis (Bouchareb et al, 2022; Folino et al, 2024; García‐Pacheco et al, 2022), electrocoagulation (Guo et al, 2022; Hamid et al, 2021; R. Li et al, 2017; Ogedey & Oguz, 2024), electrochemical oxidation (Tang et al, 2022; Vocciante et al, 2021; Zhao & Zhao, 2021), fenton processes (Crispim et al, 2022; Feng et al, 2022; X. Li et al, 2018), advanced oxidation processes (Kanmani & Dileepan, 2023, Shuo Li et al, 2022, Y. Liu et al, 2022), dissolved air flotation (Adlan et al, 2011), and coagulation/flocculation (Lessoued et al, 2017; Reddy et al, 2022; Zakaria et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Leachate treatment via electrocoagulation–coal‐based powdered activated carbon process: Efficiencies, mechanisms, kinetics, and costs

Ogedey,

Oguz

2024

Water Environment Research

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This study aims to improve COD, NH3‐N, and turbidity removal from Bingöl's leachate using a single‐reactor integrated electrocoagulation (EC)–coal‐based powdered activated carbon (CBPAC) process under various experimental conditions. In the EC‐CBPAC process, three stainless‐steel cathodes and three aluminum electrodes were connected to the negative and positive terminals of the power supply, respectively. The initial concentrations in the leachate were 1044 mg O2/L for COD, 204 mg/L for NH3‐N, and 57 NTU (or 71.25‐mg (NH2)2H2SO4/L) for turbidity, respectively. After a 40‐min EC‐CBPAC process, with a CBPAC dosage of 5 g/L and pH of 5 for COD and turbidity, and 9.5 for NH3‐N, the optimum removal efficiencies for COD, NH3‐N, and turbidity were achieved at 92%, 40%, and 91%, respectively. When the EC process was applied without CBPAC under the same experimental conditions, the removal efficiencies of COD, NH3‐N, and turbidity were 87%, 28%, and 54%, respectively. Before and after the EC‐CBPAC process, the Brunauer–Emmett–Teller (BET) surface area, pore volume, and mean pore diameter of the CBPAC were found to be (888 m2/g, 0.498 cm3/g, and 22.28 Å) and (173 m2/g, 0.18 cm3/g, and 42.8 Å), respectively. The optimum pseudo‐first‐order (PFO) rate constants for COD, turbidity, and NH3‐N were determined to be 3.15 × 10−2, 4.77 × 10−2, and 8.8 × 10−3 min−1, respectively. With the current density increasing from 15 to 25 mA/cm2, energy consumption, unit energy consumption, and total cost increased from 68.7 to 122.4 kWh/m3, 6.948 to 15.226 kWh/kg COD, and 0.85 to 1.838 $/kg COD, respectively.Practitioner points EC‐CBPAC process has greater COD, NH3‐N, and turbidity removal efficiency than EC process. COD and turbidity achieved their optimum disposal efficiencies at 92% and 91%, respectively, at pH 5 The most efficient disposal efficiency for NH3‐N was observed to be 40% at pH 9.5. EC‐CBPAC process increased removal efficiencies for COD, NH3‐N, and turbidity by 20%, 19%, and 38%, respectively, compared with EC alone. The turbidity, NH3‐N, and COD disposal fitted PSO model due to high correlation values (R2 0.94–0.99).

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