Promoted ozonation for the decomposition of 1,4-dioxane by activated carbon

Tian, Gui-Peng; Wu, Qian-Yuan; Li, Ang; Wang, Wenlong; Hu, Hong-Ying

doi:10.2166/ws.2016.071

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…Also known as diethylene dioxide, 1,4-dioxane is a synthetic polar heterocyclic compound that is widely used as a solvent stabilizer for chlorinated solvents to prevent hydrolysis and is also a common byproduct of chemical processes involving ethylene glycol or ethylene oxide. , Because of its high aqueous solubility (4.31 × 10 5 mg/L), 1,4-dioxane is frequently detected in groundwater, surface water, and wastewater streams. − The U.S. Environmental Protection Agency (EPA) and the International Agency for Research on Cancer (IARC) classified 1,4-dioxane as a probable human carcinogen (group B2) and hence, a priority MP . 1,4-Dioxane and NDMA have been used as model compounds to validate the performance of UV-based AOPs within potable reuse trains in California .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Enhanced Ozone–Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent

Vatankhah

Szczuka

Mitch

et al. 2019

Environ. Sci. Technol.

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Ozonation followed by biologically active filtration (BAF) (O3–BAF) treatment has become an alternative to reverse osmosis in potable wastewater reuse applications because of the ability to produce a high-quality effluent while reducing brine production and disposal. In this study, effluent from a sequencing batch membrane bioreactor (SBMBR) was treated by O3–BAF at three specific ozone doses (0.5, 0.7, and 1.0 mg O3/mg DOC) and different empty bed contact times (EBCTs; 15–45 min). The reaction of O3 with granular activated carbon (GAC) (O3/GAC) to promote the formation of hydroxyl radicals (·OH) was evaluated at 1.0 mg O3/mg DOC followed by BAF at 15–45 min EBCT. The efficacy of these techniques was compared for the removal of O3 refractory 1,4-dioxane and the reduction in the formation of bromate, 35 regulated and unregulated halogenated disinfection byproducts (DBPs), and 8 N-nitrosamines after chloramination. Conventional ozonation (without the presence of GAC during ozonation) removed 6–11% of 1,4-dioxane, while BAF increased the removal to ∼25%. O3/GAC improved the removal of 1,4-dioxane to ∼40%, while BAF increased the removal to ∼50%. No bromate was detected during conventional ozonation. Although O3/GAC formed 12.5 μg/L bromate, this concentration was reduced during BAF treatment to <6.8 μg/L. Even though conventional ozonation was more effective than O3/GAC for the reduction in chloramine-reactive N-nitrosodimethylamine (NDMA) precursors, BAF treatment after either conventional or enhanced ozonation reduced NDMA formation during chloramination to <10 ng/L. O3/GAC was more effective at reducing halogenated DBP formation during postchloramination. Regardless, the reduction in halogenated DBP formation during postchloramination achieved by BAF treatment was ∼90% relative to the formation in the SBMBR effluent after either conventional or enhanced ozonation. The reduction of haloacetic acid (HAA) formation improved moderately with increasing BAF EBCT. Both O3–BAF and (O3/GAC)–BAF met regulatory levels for trihalomethanes, HAAs, NDMA, and bromate.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Enhanced Ozone–Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent

Vatankhah

Szczuka

Mitch

et al. 2019

Environ. Sci. Technol.

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“…To put the achieved t-GAC catalyst stability with carbon-based materials into the context of the ozonation catalysts reported in the literature, Table S7 summarizes the results achieved for analogous studies using GAC, biochar, AC as well as metalbased catalysts (Fe/GAC and Al 2 O 3 /GAC) in terms of catalytic efficiency and stability and indicate that t-GAC activity and stability compares favorably with previous reports. [33,39,50,[68][69][70][71][72] Further, the efficiency of t-GAC was retained for seven consecutive cycles with no decay for oxalic acid degradation while other reported catalysts showed activity loss in less than five consecutive cycles (Table S7).…”

Section: Catalytic Stability Of T-gac Under Batch and Continuous Flow...mentioning

confidence: 99%

Valorization of Field‐Spent Granular Activated Carbon as Heterogeneous Ozonation Catalyst for Water Treatment

López‐Francés,

Cabrero‐Antonino,

Bernat‐Quesada

et al. 2024

ChemSusChem

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Developing sustainable cost‐effective strategies for valorization of field‐spent granular activated carbon (s‐GAC) from industrial water treatment has gained much interest. Here, we report a cost‐effective strategy for the regeneration of s‐GAC as an adsorbent in a large‐scale drinking water treatment plant and used as an efficient and durable ozonation catalyst in water. To achieve this, a series of samples is prepared by subjecting s‐GAC to thermally controlled combustion treatments with and without pyrolysis. The catalytic performance of the optimized sample is evaluated for oxalic acid degradation as the model pollutant under batch (> 15 h) and continuous flow operations (> 200 h). The partially deactivated catalyst upon reuse is restored by thermal treatment. Electron paramagnetic resonance and selective quenching experiments show the formation of 1O2 during catalytic ozonation. The GAC‐ozonation catalyst is efficient to minimize the formation of chlorinated disinfection by‐products like trihalomethanes and haloacetic acids in an urban wastewater effluent.

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“…Catalytic ozonation is an effective advanced oxidation process (AOP) for the removal of organic contaminants from water and wastewater [20][21][22][23], owing to its ability to decompose the ozone molecule to highly reactive radical species, which rapidly react with organic contaminants. Several solid catalysts, such as iron oxides [20,[24][25][26], ceria oxide [27,28], activated carbon [29,30] and Fe 0 [31], have been used successfully to catalyze the decomposition of organic compounds in wastewaters using ozone or hydrogen peroxide. In general, the catalytic activity is related to the BET surface area, crystallinity and ability to produce free radicals from ozone or hydrogen peroxide [32].…”

mentioning

confidence: 99%

“…In addition, catalytic ozonation generally has a low impact on the water quality after treatment and is a process that is easy to implement at the industrial scale at a relatively low cost [33]. The catalytic ozonation of water contaminated with 1,4-dioxane has been reported in only one study, employing activated carbon as the catalyst (efficiency of 1,4dioxane removal was 95% for 3000 ppm of activated carbon) [29], and the use of metal oxides as catalysts has not been reported.…”

mentioning

confidence: 99%

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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Promoted ozonation for the decomposition of 1,4-dioxane by activated carbon

Cited by 11 publications

References 31 publications

Evaluation of Enhanced Ozone–Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent

Evaluation of Enhanced Ozone–Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent

Valorization of Field‐Spent Granular Activated Carbon as Heterogeneous Ozonation Catalyst for Water Treatment

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

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