Influence of Groundwater Constituents on 1,4-Dioxane Degradation by a Binary Oxidant System

Yan, Ni; Liu, Fei; Chen, Yifei; Brusseau, Mark L.

doi:10.1007/s11270-016-3146-y

Cited by 11 publications

(6 citation statements)

References 27 publications

(33 reference statements)

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“…This is in contrast to other Fentonlike systems, which have been shown to be more sensitive to ionic composition. For example, Yan et al evaluated bicarbonate and calcium ions, which are often the most abundant ions in groundwater, and observed that they have a strong effect on dioxane degradation (Yan et al, 2016). These contrasting results indicate that the G-nZVI system is a robust medium for treatment of groundwater contaminated by TCA and similar compounds.…”

Section: Discussionmentioning

confidence: 99%

The impact of surface properties and dominant ions on the effectiveness of G-nZVI heterogeneous catalyst for environmental remediation

Farooq

Danish

Lyu

et al. 2019

Science of The Total Environment

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The surface properties of nanocomposites are influenced by the existence of inorganic species that may affect its performance for specific catalytic applications. The impact of different ionic species on particular catalytic activity had not been investigated to date. In this study, the surface charge (zeta potential) of graphene-oxide-supported nano zero valent iron (G-nZVI) was tested in definitive cationic (Na + , K + , Ca 2+ and Mg 2+) and anionic (Br − , Cl − , NO 3 − , SO 4 2− , and HCO 3 −) environments. The efficiency of G-nZVI catalyst was inspected by measuring the generation of reactive oxygen species (ROS) for the degradation of 1,1,1-trichloroethane (TCA) in sodium percarbonate (SPC) system. Tests conducted using probe compounds confirmed the generation of OH • and O 2 •− radicals in the system. In addition, the experiments performed using scavenging agents certified that O 2 •− were primary radicals responsible for TCA removal, along with prominent contribution from OH • radicals. The study confirmed that G-nZVI catalytic capability for TCA degradation is notably affected by various cationic species. The presence of Ni 2+ and Cu 2+ significantly enhanced (94%), whereas Na + and K + had minor effects on TCA removal. Overall, the results indicated that groundwater ionic composition may have low impact on the effectiveness of G-nZVI-catalyzed peroxide TCA treatment.

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Section: Discussionmentioning

confidence: 99%

The impact of surface properties and dominant ions on the effectiveness of G-nZVI heterogeneous catalyst for environmental remediation

Farooq

Danish

Lyu

et al. 2019

Science of The Total Environment

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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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“…Each of the oxidants have their advantages and disadvantages, which are discussed in detail in the preceding references. The use of persulfate has some advantages for subsurface applications, and it has been proven to be effective for the treatment of TCE (e.g., Liang et al 2004a; Liang et al 2004b) and dioxane (Zhong et al, 2015; Eberle et al 2016; Yan et al, 2016). …”

Section: Introductionmentioning

confidence: 99%

Treatment of 1,4-dioxane and trichloroethene co-contamination by an activated binary persulfate-peroxide oxidation process

Yan

Liu

et al. 2018

Environ Sci Pollut Res

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The efficacy of a binary oxidant system, hydrogen peroxide (HO) and persulfate, was investigated for treatment of 1,4-dioxane (dioxane) and trichloroethene (TCE) co-contamination. Batch experiments were conducted to examine the catalytic efficiency of Fe and NaOH-based activation, oxidant decomposition rates, contaminant degradation effectiveness, and competitive degradation effects. For NaOH activation, the oxidant decomposition rate was moderate and sustained during the entire test period of 96 h. However, dioxane degradation was limited (~ 33%). Conversely, the oxidants were depleted within 24 h for the Fe-activated system, and dioxane degradation was complete within 4 h. The activation and radical generation processes were different between Fe and NaOH activation. Both dioxane and TCE underwent complete degradation in the co-contaminant experiment. The results of this study indicate that the Fe-catalyzed binary hydrogen peroxide-persulfate oxidant system is effective for oxidation of the tested contaminants separately and as co-contaminants.

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Influence of Groundwater Constituents on 1,4-Dioxane Degradation by a Binary Oxidant System

Cited by 11 publications

References 27 publications

The impact of surface properties and dominant ions on the effectiveness of G-nZVI heterogeneous catalyst for environmental remediation

The impact of surface properties and dominant ions on the effectiveness of G-nZVI heterogeneous catalyst for environmental remediation

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

Treatment of 1,4-dioxane and trichloroethene co-contamination by an activated binary persulfate-peroxide oxidation process

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