Kinetics and operational parameters for 1,4-dioxane degradation by the photoelectro-peroxone process

Shen, Wenhua; Wang, Yujue; Zhan, Juhong; Wang, Bin; Huang, Jun; Deng, Shubo; Yu, Gang

doi:10.1016/j.cej.2016.10.111

Cited by 57 publications

(15 citation statements)

References 50 publications

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“…CuO was significantly lower than that observed after the treatment in the absence of the catalysis. Catalytic oxidation with CuO increased the mineralization rate of the toxic intermediates formed during the 1,4-dioxane oxidation treatment, as also observed in the case of treatment by the photoelectron-peroxone process [68]. Notably, the toxicity of the samples treated by ozonation alone increased significantly during the treatment process, presumably due to the insignificant rate of mineralization observed, suggesting a gradual accumulation of toxic intermediates in solution, in agreement with the results obtained using the electro-peroxone process [69].…”

Section: Acute Toxicity Test With Vibrio Fischerisupporting

confidence: 62%

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Scaratti

Basso

Landers

et al. 2018

Environmental Technology

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In this study, treatment for the removal of 1,4-dioxane by ozone and by catalytic ozonation using CuO as the catalyst was investigated. While the removal of 1,4-dioxane was small (20%) and mineralization negligible after 6 h of ozonation treatment, the removals of 1,4-dioxane and total organic carbon increased by factors of 10.35 and 81.25, respectively, after catalytic ozonation in the presence of CuO. The mineralization during catalytic ozonation was favored at pH 10 (94.91 min -1 ), although it proceeded even at pH 3 (54.41 min -1 ). The CuO catalyst decreased the equilibrium concentration of soluble ozone and favored its decomposition to reactive oxidative species. Radical scavenging experiments demonstrated that superoxide radicals were the main species responsible for the degradation of 1,4-dioxane. Further scavenging experiments with phosphate confirmed the presence of Lewis active sites on the surface of CuO, which were responsible for the adsorption and decomposition of ozone. The reaction mechanism proceeded through the formation of ethylene glycol diformate, which quickly hydrolyzed to ethylene glycol and formic acid as intermediate products. The stability of CuO indicated weak copper leaching and high catalytic activity for five recycling cycles. The toxicity of the water, assessed by Vibrio fischeri bioluminescence assays, remained the same (low toxicity) after catalytic ozonation while it increased after treatment with ozonation alone.

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Section: Acute Toxicity Test With Vibrio Fischerisupporting

confidence: 62%

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Scaratti

Basso

Landers

et al. 2018

Environmental Technology

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“…In this research, as a merged procedure, the E-peroxone method not only considerably improved TOC removal but also significantly enhanced the energy efficiency for TOC elimination in comparison with the two separate procedures. In another report by Shen et al [ 35 ] the energy efficiency was investigated. In this study, after 45 min of treatment, the UV/O 3 , EP, and PEP procedures eliminated 70%, 37%, and 98% of TOC from 1,4-dioxane solutions with SEC of 0.38 kWh/g TOC removed, 0.22 kWh/g TOC removed, and 0.30 kWh/g TOC removed, respectively…”

Section: Resultsmentioning

confidence: 99%

Optimization of UV-Electroproxone procedure for treatment of landfill leachate: the study of energy consumption

Kermani

Shahsavani

Ghaderi

et al. 2021

J Environ Health Sci Engineer

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With increased population, treatment of solid waste landfill and its leachate is of major concern. Municipal landfill leachate shows variable, heterogeneous and incontrollable characteristics and contains wide range highly concentrated organic and inorganic compounds, in which hampers the application of a solo method in its treatment. Among different approaches, biological treatment can be used, however it is not effective enough to elimination all refractory organics, containing fulvic-like and humic-like substance. In this experimental study, the UV Electroperoxone process as a hybrid procedure has been employed to treat landfill leachate. The effect of various parameters such as pH, electrical current density, ozone concentration, and reaction time were optimized using central composite design (CCD). In the model fitting, the quadratic model with a P-Value less than 0.5 was suggested (< 0.0001). The R2, R2 adj, and R2 pre were determined equal to 0.98,0.96, and 0.91 respectively. Based on the software prediction, the process can remove 83% of initial COD, in the optimum condition of pH = 5.6, ozone concentration of 29.1 mg/l. min, the current density of 74.7 mA/cm2, and process time of 98.6 min. In the optimum condition, 55/33 mM H2O2 was generated through electrochemical mechanism. A combination of ozonation, photolysis and electrolysis mechanism in this hybrid process increases COD efficiency removal up 29 percent which is higher than the sum of separated mechanisms. Kinetic study also demonstrated that the UV-EPP process follows pseudo-first order kinetics (R2 = 0.99). Based on our results, the UV-EPP process can be informed as an operative technique for treatment of old landfills leachates. Graphical abstract

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“…If the application of these methods is to be considered in actual wastewater treatment, the energy cost as well as the operational cost must be known. In this regard, specific energy consumption (SEC) which defines the amount of electrical energy consumption (kWh) per unit mass of COD was calculated (Saien et al 2014;Shen et al 2017). When the process was based on the photochemical reaction, Eq.…”

Section: Uv Dose and Cost-effectivenessmentioning

confidence: 99%

“…(4) was used (Saien et al 2014), while in O 3 -based processes, SEC was calculated according to Eq. (5) (Shen et al 2017).…”

Section: Uv Dose and Cost-effectivenessmentioning

confidence: 99%

Comparison of radical-driven technologies applied for paraben mixture degradation: mechanism, biodegradability, toxicity and cost assessment

Gmurek

Gomes

Martins

et al. 2019

Environ Sci Pollut Res

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Parabens (esters of p-hydroxybenzoic acid) are xenobiosis belonging to endocrine disruptors and commonly used as a preservative in cosmetics, food, pharmaceutical, and personal care products. Their wide use is leading to their appearance in water and wastewater in the range from ng/L to mg/L. In fact, the toxicity of benzylparaben is comparable to bisphenol A. Therefore, it is important to find not only effective but also ecofriendly methods for their removal from aqueous environment since the traditional wastewater treatment approaches are ineffective. Herein, for the first time, such extended comparison of several radical-driven technologies for paraben mixture degradation is presented. The detailed evaluation included (1) comparison of ozone and hydroxyl peroxide processes; (2) comparison of catalytic and photocatalytic processes (including photocatalytic ozonation); (3) characterisation of catalysts using SEM, XRD, DRS, XPS techniques and BET isotherm; (4) mineralisation, biodegradability and toxicity assessment; and (5) cost assessment.

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Kinetics and operational parameters for 1,4-dioxane degradation by the photoelectro-peroxone process

Cited by 57 publications

References 50 publications

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Optimization of UV-Electroproxone procedure for treatment of landfill leachate: the study of energy consumption

Comparison of radical-driven technologies applied for paraben mixture degradation: mechanism, biodegradability, toxicity and cost assessment

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