Remediation of Poly‐ and Perfluorinated Chemical Substances (PFAS) in the Environment by Ionizing Technology

Suresh, D. Pillai; Kowald, Corinne; Lassalle, John; Staack, David

doi:10.1002/9781119488583.ch13

Cited by 1 publication

(1 citation statement)

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“…Ionizing radiation technology is another unique AOP-based wastewater treatment method that employs gamma rays or high-energy electron beams as radiation sources to eliminate hard-to-degrade pollutants [24,25]. Ionizing radiation can directly interact with the pollutants or can degrade pollutants by producing hydroxyl and other reactive species from water due to its exposure to high energy radiation [26,27].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Ionizing Radiation Process in the Integrated Coagulation–Sedimentation, Fenton Oxidation, and Biological Process for Treatment of Leachate Wastewater

Liu,

Sinharoy,

Lee

et al. 2023

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This study evaluated the feasibility of ionizing radiation combined with coagulation–sedimentation and Fenton oxidation as a treatment method for landfill leachate. The experiments revealed a positive correlation between pollutant removal efficiency and increased ionizing radiation intensity. Remarkable pollutant removal efficiencies were achieved under ionizing radiation at 50 kGy, with a maximum of 27% removal of total organic carbon (TOC), 61% removal of total nitrogen, 51% removal of total phosphorus, and an impressive 93% removal of NO3−-N. With the addition of coagulation–sedimentation and Fenton oxidation, the treatment efficiency further increased by 33% nitrogen, 18% SCOD, and 8% phosphate. The most significant observation from the study was that for all the different treatment methods, the results were always better for leachate samples treated with ionizing radiation than for the untreated samples. Subsequently, biological treatment was applied as a post-treatment method to remove residual organic carbon and nitrogen, which found that the best removal efficiencies were only for the low salt concentration (0.5%) and the removal decreased with increasing salt concentration. These experimental results conclusively demonstrated that when treating leachate wastewater, it was more appropriate to employ physicochemical methods rather than a biological treatment, primarily due to the high salt concentration present.

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