Application of Fenton’s reagent as a polishing step for removal of UV quenching organic constituents in biologically treated landfill leachates

Gupta, Abhinav; Zhao, Renzun; Novak, John T.; Goldsmith, C. Douglas

doi:10.1016/j.chemosphere.2013.12.066

Cited by 40 publications

(12 citation statements)

References 20 publications

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“…More than 90 % of UV 254 in raw leachate can be removed after the Fenton treatment. Particularly, Fenton oxidation targets biorefractory UV-quenching humic substances that are mainly >1 kDa [56,57].…”

Section: Aops For Mitigation Of Uv-quenching Organic Matters In Landfmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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Advanced oxidation processes (AOPs) were first proposed in the 1980s for drinking water treatment and later were widely studied for treatment of different wastewaters. During the AOP treatment of wastewater, hydroxyl radicals (OH·) or sulfate radicals (SO 4 ·− ) are generated in sufficient quantity to remove refractory organic matters, traceable organic contaminants, or certain inorganic pollutants, or to increase wastewater biodegradability as a pre-treatment prior to an ensuing biological treatment. In this paper, we review the fundamental mechanisms of radical generation in different AOPs and select landfill leachate and biologically treated municipal wastewater as model wastewaters to discuss wastewater treatment with different AOPs. Generally, the treatment efficiencies rely heavily upon the selected AOP type, physical and chemical properties of target pollutants, and operating conditions. It would be noted that other mechanisms, besides hydroxyl radical or sulfate radical-based oxidation, may occur during the AOP treatment and contribute to the reduction of target pollutants. Particularly, we summarize recent advances in the AOP treatment of landfill leachate, as well as advanced oxidation of effluent organic matters (EfOM) in biologically treated secondary effluent (BTSE) for water reuse.

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Section: Aops For Mitigation Of Uv-quenching Organic Matters In Landfmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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“…There are many reports on Fenton's reaction treating landfill leachate. [14,15] At present, the treatment of ammonia nitrogen wastewater could be divided into physical method, chemical method, and biological method. [16,17] A large number of studies have shown that the magnesium ammonium phosphate (MAP) precipitation could effectively remove ammonia nitrogen from wastewater.…”

Section: Experimental Unit and Methodsmentioning

confidence: 99%

Study on treating old landfill leachate by Ultrasound–Fenton oxidation combined with MAP chemical precipitation

Zhang

Yang

Wang

et al. 2015

Chemical Speciation & Bioavailability

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In this study, the "Ultrasound/Fenton oxidation -MAP chemical precipitation" method was used to remove chemical oxygen demand (COD) and ammonia nitrogen from the old landfill leachate which was collected from one sanitary landfill in Wuhan. Firstly, Ultrasound treatment and Fenton oxidation treatment were separately used to treat the old landfill leachate, and under their optimum reaction conditions, the COD concentration was degraded from 842 to 697 mg L −1 and from 842 to 133 mg L −1 , respectively. Then, Ultrasound/Fenton oxidation treatment was used to treat the same old landfill leachate. Compared with the single Fenton treatment, Ultrasound/ Fenton oxidation treatment could raise the COD removal efficiency from 84.05 to 90.88% with the same H 2 O 2 consumption. After the Ultrasound/Fenton oxidation treatment, Na 2 HPO 4 ·12H 2 O and MgSO 4 ·7H 2 O were used as precipitation reagents to remove ammonia nitrogen from the old landfill leachate, and the ammonia nitrogen concentration degraded from 910 to 11 mg L −1. The experiment results indicated that "Ultrasound/Fenton oxidation -MAP chemical precipitation" method was an effective and economic method to treat old landfill leachate.

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“…However, landfill leachate that contains a high concentration of organic matter can interfere with the UV disinfection process, as the recalcitrant organic matter can strongly absorb the UV light (Iskander et al, 2018;Zhao et al, 2013b). Even after upfront biological treatment, the residual recalcitrant organic matter further interferes with the downstream UV disinfection in POTWs (Gupta et al, 2014a). Hence, POTWs are prudential on accepting landfill leachate (Karidis, 2016).…”

Section: /39mentioning

confidence: 99%

Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

Patel

Brazil²,

Lou

et al. 2020

Preprint

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The objective of this study was to evaluate the effects of CEPT for leachate and sewage co-treatment in a POTW. The results showed that ferric and aluminum coagulants remove about 54 - 74% organic matter where ferric performed better than aluminum coagulant. However, ferric coagulant was found to exacerbate the UV absorbance after coagulation at high dose due to the interaction with dissolved organic matter by forming soluble transition metal complexes. These organo-metal complexes have been found to increase the UV absorbance and this study provides the scientific background for such phenomenon.<br>

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Application of Fenton’s reagent as a polishing step for removal of UV quenching organic constituents in biologically treated landfill leachates

Cited by 40 publications

References 20 publications

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Study on treating old landfill leachate by Ultrasound–Fenton oxidation combined with MAP chemical precipitation

Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

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