Landfill leachate treatment by persulphate related advanced oxidation technologies

Chen, Guanyi; Wu, Guanyun; Li, Ning; Lu, Xukai; Zhao, Jianhui; He, Mengting; Yan, Beibei; Zhang, Hongqiong; Duan, Xiaoguang; Wang, Shaobin

doi:10.1016/j.jhazmat.2021.126355

Cited by 97 publications

(12 citation statements)

References 87 publications

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“…The persulfate concentration was measured spectrophotometrically 14 and the determination of TOC in solution was carried out via a TOC-II analyzer. The TOC removal (%) was computed via eqn (6).…”

Section: Methodsmentioning

confidence: 99%

“…5 Recently, advanced oxidation technology based on persulfate has been a popular research topic. 6,7 In an anodic oxidation system in which sulfate is used as the electrolyte, sulfate can be oxidized to persulfate at a certain current (eqn (4)). Persulfate itself is not very reactive, but it can be activated in the presence of strong bases to produce SO 4 ˙ − (eqn (5)), which has stronger oxidation properties.2SO 4 2− → S 2 O 8 2− + 2e − …”

Section: Introductionmentioning

confidence: 99%

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Anodic oxidation to produce persulfate for treatment of oilfield wastewater and synthesis of Fe(vi)

Yan

zhang

2022

Environ. Sci.: Water Res. Technol.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anodic oxidation to produce persulfate for treatment of oilfield wastewater and synthesis of Fe(vi)

Yan

zhang

2022

Environ. Sci.: Water Res. Technol.

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“…During the experiments, we also found that the pH of the system effluent decreased to varying degrees. This is due to the acidification that occurs during the treatment process, the formation of hypochlorous acid by reactions such as PS hydrolysis, and the accumulation of small-molecule organic acids such as carboxylic acids as shown in Equations ( 14) and ( 15) [24].…”

Section: Effects Of Initial Ph Valuementioning

confidence: 99%

Experimental Study on the Treatment of Landfill Leachate by Electro-Assisted ZVI/UV Synergistic Activated Persulfate System

et al. 2022

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To solve the problem of the poor treatment of high concentration landfill leachate, an electro-assisted ultraviolet (UV)/zero-valent iron (ZVI) synergic activated persulfate (PS) system was used to treat landfill leachate. The effects of PS and ZVI dosage, initial pH value, and current density on the removal efficiency of COD and NH3-N in landfill leachate were investigated. The treatment effects of single PS, single electrochemical, UV/PS, electro-assisted ZVI activated PS, and electro-assisted ZVI/UV co-activated PS were compared. At the same time, UV-visible and three-dimensional fluorescence spectroscopy were performed on the landfill leachate before and after treatment. The results show that under the optimal conditions of initial pH = 3, the dosage of PS/12COD = 1, ZVI = 1.5 g/L, current density 62.5 mA/cm2, and t = 6 h, most of the macromolecular organic substances such as humic acid and fulvic acid were removed. Removal efficiencies of COD, NH3-N, and Chroma reached 81.99%, 89.90%, and 99.75%, respectively. The BOD5/COD value increased from 0.23 to 0.46. In addition, the radical identification results showed that the degradation of COD was due to the combined action of sulfate radicals (SO4•−) and hydroxyl radicals (•OH) and that SO4•− was dominant. The combined means of synergistic activation of PS for landfill leachate treatment was significantly better than that of single means of PS activation, confirming that electrically assisted ZVI/UV synergistic activation of PS is a promising method for landfill leachate treatment.

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“…Leachate generated by the waste remains one of the most difficult pollutants to treat, it is defined as the water that percolates through the landfill waste that is loaded bacteriologically and chemically by mineral and organic substances, their composition depends mainly on the source of the landfill content and the quantity of precipitation, and the age of the landfill [ 2 , 3 ]. A number of different treatment approaches have been applied for leachate processing, various natural treatment methods such as coagulation and flocculation, infiltration percolation, advanced oxidation processes (AOP), nitrification and denitrification, and anaerobic digestion [ [4] , [5] , [6] , [7] ].…”

Section: Introductionmentioning

confidence: 99%

Maximizing bio-methane potential from municipal landfill leachate through ultrasonic pretreatment

Farsad,

Ben Hamou,

Chaoui

et al. 2023

Heliyon

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Landfill leachate treatment by persulphate related advanced oxidation technologies

Cited by 97 publications

References 87 publications

Anodic oxidation to produce persulfate for treatment of oilfield wastewater and synthesis of Fe(vi)

Anodic oxidation to produce persulfate for treatment of oilfield wastewater and synthesis of Fe(vi)

Experimental Study on the Treatment of Landfill Leachate by Electro-Assisted ZVI/UV Synergistic Activated Persulfate System

Maximizing bio-methane potential from municipal landfill leachate through ultrasonic pretreatment

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