Impact of groundwater quality and associated byproduct formation during UV/hydrogen peroxide treatment of 1,4-dioxane

Lee, Cheng‐Shiuan; Venkatesan, Arjun K.; Walker, Harold W.; Gobler, Christopher J.

doi:10.1016/j.watres.2020.115534

Cited by 37 publications

(13 citation statements)

References 49 publications

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“…Electrical energy per order (EE/O) is a quantity defined as the energy required for one log removal (90% removal) of a contaminant in a unit volume of water. This parameter is typically used to evaluate the energy efficiency of advanced oxidation processes (AOP) to degrade a target contaminant . EE/O is calculated for AOP systems using the following equation , where P is the power (kW), t is the time (min), V is the sample volume (L), C in is the influent concentration, and C out is the effluent concentration of the target contaminant.…”

Section: Influence Of Key Operating Parameters Of E-beam To Treat Pfasmentioning

confidence: 99%

“…This parameter is typically used to evaluate the energy efficiency of advanced oxidation processes (AOP) to degrade a target contaminant . EE/O is calculated for AOP systems using the following equation , where P is the power (kW), t is the time (min), V is the sample volume (L), C in is the influent concentration, and C out is the effluent concentration of the target contaminant. This equation can be modified for e-beam treatment of y mL of water sample receiving a dose of x kGy by using unit conversion as follows where Dose denotes the dose delivered to the water sample in unit of kGy (kJ kg –1 of water).…”

Section: Influence Of Key Operating Parameters Of E-beam To Treat Pfasmentioning

confidence: 99%

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Energy Evaluation of Electron Beam Treatment of Perfluoroalkyl Substances in Water: A Critical Review

et al. 2021

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Due to their recalcitrant nature and ubiquitous use, per-and polyfluoroalkyl substances (PFAS) will continue to be major water treatment hurdles. Although effective water treatment technologies exist for physical removal of many PFAS from water (e.g., activated carbon and ion-exchange resin), a PFAS-concentrated waste stream is generated as an end product that can potentially reintroduce PFAS back into the environment. Thus, there is an increased interest in developing destructive technologies to decompose and mineralize PFAS directly in water or in these waste streams. High energy electron beam (e-beam) accelerators have been used for water treatment to degrade a wide range of recalcitrant contaminants, including PFAS, since the 1960s. However, large-scale applications of e-beam for water treatment are restricted due to its high energy consumption and inability to treat large flow rates. Considering there are very few available technologies for destructive removal of PFAS, this study provides a critical review on the treatment of PFAS by direct irradiation of contaminated water by e-beam from an energy consumption point of view. To date, very limited studies have been conducted to investigate the success of this technology to treat PFAS. Results from the limited studies were not directly comparable due to the variation in operating conditions and water quality parameters used in the studies. Here, for the first time, we develop and apply the concept of electrical energy per order (EE/O) to assess the performance of e-beam for PFAS treatment. Results show that EE/O is a better performance parameter than the G value of e-beam for interstudy comparisons and to evaluate the effects of water quality and operating parameters on e-beam performance. We additionally developed a kinetic scheme to predict the performance of e-beam to treat PFAS and revealed that the competition between species to react with aqueous electrons is the determinant factor influencing PFAS degradation efficiency. Comparison of EE/O values of e-beam (range: 31−176 kWh m −3 order −1 ) with other destructive technologies (range: 5−9595 kWh m −3 order −1 ) suggest that e-beam, for PFAS treatment, is a promising approach under favorable conditions. This review further elucidates the feasibility and limitations of e-beam technology that could be improved upon to potentially make e-beam viable for large-scale water treatment applications.

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Section: Influence Of Key Operating Parameters Of E-beam To Treat Pfasmentioning

confidence: 99%

Section: Influence Of Key Operating Parameters Of E-beam To Treat Pfasmentioning

confidence: 99%

Energy Evaluation of Electron Beam Treatment of Perfluoroalkyl Substances in Water: A Critical Review

et al. 2021

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“…The inhibition at pH 3.0 and 5.0 might be attributed to the strong scavenging effect of H + , H 2 PO 4 2− , and H 2 PO 4 − at acidic conditions (Kong et al, 2016). At alkaline conditions, the selfdecomposition rate of H 2 O 2 increased rapidly (Lee et al, 2020). In addition, hydroperoxide anion (HO 2 − ) could consume •OH and decreased the steady-state concentrations of •OH (Tan et al, 2013;Liu et al, 2016).…”

Section: Effect Of Solution Phmentioning

confidence: 99%

“…Advanced oxidation processes (AOPs) have been reported to be highly efficient processes for the degradation of refractory PPCPs (Miklos et al, 2018;Huang et al, 2020;Lee et al, 2020;Wang and Zhuan, 2020;Wu et al, 2020). Some AOPs, such as photo-Fenton, heterogeneous photocatalysis, UV/TiO 2 and UV/ H 2 O 2 have been explored to remove benzodiazepines in water (Bosio et al, 2019;Cunha et al, 2019;Mitsika et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Degradation of 17 Benzodiazepines by the UV/H2O2 Treatment

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Pu²,

Yang

et al. 2021

Front. Environ. Sci.

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Benzodiazepines are one group of psychoactive drugs widely detected in water environments, and their persistence during conventional wastewater treatment has raised great concerns. Here we investigated the degradation of 17 benzodiazepines in water by UV/H2O2 treatment. The results showed that the UV/H2O2 treatment significantly increased the degradation of 17 benzodiazepines in phosphate buffer solutions at pH 7.0. This can be attributed to the high reactivity of hydroxyl radicals (·OH) towards benzodiazepines with second-order rate constants of 3.48 × 109 M−1 s−1–2.44 × 1010 M−1 s−1. The degradation of alprazolam, a typical benzodiazepine, during the UV/H2O2 treatment was increased with the increasing H2O2 dosage. The solution pH influenced the alprazolam degradation significantly, with the highest degradation at pH 7.0. Water matrix, such as anions (Cl−, HCO3−, NO3−) and humic acid, decreased the degradation of alprazolam by UV/H2O2 treatment. Based on the degradation products identified using quadrupole time-of-flight mass spectrometer, the degradation mechanisms of alprazolam by UV/H2O2 treatment were proposed, and hydroxylation induced by ·OH was the main reaction pathway. The degradation of 17 benzodiazepines by UV/H2O2 treatment in wastewater treatment plant effluent and river water was lower than that in phosphate buffer solutions. The results showed that the benzodiazepine psychoactive drugs in natural water can be effectively removed by the UV/H2O2 treatment.

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2023

Destruction of Hazardous Chemicals in the Laboratory

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Impact of groundwater quality and associated byproduct formation during UV/hydrogen peroxide treatment of 1,4-dioxane

Cited by 37 publications

References 49 publications

Energy Evaluation of Electron Beam Treatment of Perfluoroalkyl Substances in Water: A Critical Review

Energy Evaluation of Electron Beam Treatment of Perfluoroalkyl Substances in Water: A Critical Review

Degradation of 17 Benzodiazepines by the UV/H2O2 Treatment

Procedures Classified by Method

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