Peroxone activated persulfate treatment of 1,4-dioxane in the presence of chlorinated solvent co-contaminants

Eberle, Dylan; Ball, Raymond; Boving, Thomas B.

doi:10.1016/j.chemosphere.2015.08.063

Cited by 39 publications

(13 citation statements)

References 35 publications

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“…Mixing hydrogen peroxide with Fe 2+ or UV has been shown to be effective in removing dioxane (Kiker et al, 2010; Vescovi et al, 2010). Bench scale experiments have also demonstrated the effective removal of 1,4-dioxane using ozone, ozone plus hydrogen peroxide, persulfate, sono-activated persulfate, permanganate, and UV based oxidation technologies (Eberle et al, 2016; Ikehata et al, 2016; Li and Zhu, 2016; Wang et al, 2015; Félix-Navarro et al, 2007; Waldemer and Tratnyek, 2006; Vescovi et al, 2010; Mohr et al, 2010; Schreier et al, 2006). …”

Section: Introductionmentioning

confidence: 99%

Remediating 1,4-dioxane-contaminated water with slow-release persulfate and zerovalent iron

et al. 2017

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1,4-dioxane is an emerging contaminant that was used as a corrosion inhibitor with chlorinated solvents. Metal-activated persulfate can degrade dioxane but reaction kinetics have typically been characterized by a rapid decrease during the first 30 min followed by either a slower decrease or no further change (i.e., plateau). Our objective was to identify the factors responsible for this plateau and then determine if slow-release formulations of sodium persulfate and Fe0 could provide a more sustainable degradation treatment. We accomplished this by conducting batch experiments where Fe0-activated persulfate was used to treat dioxane. Treatment variables included the timing at which the dioxane was added to the Fe0-persulfate reaction (T = 0 and 30 min) and including various products of the Fe0-persulfate reaction at T=0 min (Fe2+, Fe3+, and SO42−). Results showed that when dioxane was spiked into the reaction at 30 min, no degradation occurred; this is in stark contrast to the 60% decrease observed when added at T = 0 min. Adding Fe2+ at the onset (T= 0 min) also severely halted the reaction and caused a plateau. This indicates that excess ferrous iron produced from the Fe0-persulfate reaction scavenges sulfate radicals and prevents further dioxane degradation. By limiting the release of Fe0 in a slow-release wax formulation, degradation plateaus were avoided and 100% removal of dioxane observed. By using 14C-labeled dioxane, we show that ~40% of the dioxane carbon is mineralized within 6 d. These data support the use of slow-release persulfate and zerovalent iron to treat dioxane-contaminated water.

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Section: Introductionmentioning

confidence: 99%

Remediating 1,4-dioxane-contaminated water with slow-release persulfate and zerovalent iron

et al. 2017

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“…In the absence of ozone, 1,4-dioxane would be removed by adsorption onto the solid surface, because the formation of free radicals at room temperature is negligible [53]. In fact, CuO is an effective catalyst for the degradation of organic compounds by wet catalytic oxidation via a radical reaction mechanism [54], but these reactions only occur at high temperature (200 -325 o C) and pressure (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) in the presence of oxygen/air [55].…”

Section: Catalyzed Ozonation Of 14-dioxane With Cuomentioning

confidence: 99%

“…Consequently, advanced treatment processes for the degradation of 1,4-dioxane in contaminated groundwater have been investigated, including biodegradation [10], chemical oxidation by Fenton and hydrogen peroxide/UV processes [11,12], ozone (O3) with hydrogen peroxide, persulfate and peroxone-activated persulfate [13,14,15]. When O3 is used as the sole oxidant it has been found to be relatively ineffective, since the 1,4dioxane molecule does not present reacting sites that favor direct attack by O3 [13,[16][17][18][19].…”

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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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“…The results of recent research indicate that advanced oxidation processes implemented with activated persulfate, particularly in some combination with other oxidants, is effective for degradation of dioxane (e.g., Zhao et al, 2014;Zhong et al, 2015;Eberle et al, 2016;Yan et al, 2016). Very few studies have investigated the effectiveness of persulfate activation by natural aquifer materials (Sra et al, 2010;Liu et al, 2014), and these few studies have focused on oxidant activation and not on the efficacy of contaminant degradation nor on dioxane specifically.…”

Section: Introductionmentioning

confidence: 99%

The natural activation ability of subsurface media to promote in-situ chemical oxidation of 1,4-dioxane

2019

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The ability of soils and sediments to promote in-situ activation of persulfate and persulfate combined with hydrogen peroxide was investigated for treatment of 1,4-dioxane (dioxane). Experiments were conducted with both batch-reactor and column systems to examine reaction rates and activation mechanisms. Four soils and aquifer sediments were used. ICP-MS and XRD analyses were used to characterize geochemical properties of the solutions and sediments, while EPR spectroscopy was used to characterize radical formation. For the batch experiments, degradation of dioxane was significantly greater in the presence of each of the four subsurface geomedia compared to the controls with no geomedia. This indicates that all four geomedia induced oxidant activation, thereby enhancing dioxane degradation. Dioxane degradation was significantly enhanced by the addition of peroxide to the persulfate solution. It is hypothesized that iron associated with the geomedia is primarily responsible for activation, and that the degree of degradation enhancement relates in part to dissolved-phase iron content. EPR results indicate that manganese oxides and soil organic matter may also have contributed to some degree to persulfate activation, and that manganese oxides enhanced activation of peroxide under the study conditions. Approximately 8% of dioxane was degraded in the miscible-displacement experiments, consistent with the short residence time compared to dioxane's half-life. The pseudo first-order rate coefficients obtained from the batch and column experiments were similar. The results of this study indicate that subsurface geomedia can induce activation of persulfate and peroxide to enhance in-situ chemical oxidation applications.

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Peroxone activated persulfate treatment of 1,4-dioxane in the presence of chlorinated solvent co-contaminants

Cited by 39 publications

References 35 publications

Remediating 1,4-dioxane-contaminated water with slow-release persulfate and zerovalent iron

Remediating 1,4-dioxane-contaminated water with slow-release persulfate and zerovalent iron

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

The natural activation ability of subsurface media to promote in-situ chemical oxidation of 1,4-dioxane

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