DOI: 10.1016/j.watres.2018.11.028
Scopus记录号: 2-s2.0-85056749546
论文题名: The natural activation ability of subsurface media to promote in-situ chemical oxidation of 1,4-dioxane
作者: Yan N. ; Zhong H. ; Brusseau M.L.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 386
结束页码: 393
语种: 英语
英文关键词: Dioxane
; Hydrogen peroxide
; Natural oxidant activation
; Persulfate
Scopus关键词: Aquifers
; Batch reactors
; Electron spin resonance spectroscopy
; Ethers
; Hydrogen peroxide
; Iron
; Manganese oxide
; Oxidants
; Oxidation
; Peroxides
; Polyols
; Reaction rates
; Sediments
; Soils
; Activation mechanisms
; Degree of degradation
; Dioxane
; Geochemical properties
; In-situ chemical oxidations
; Miscible displacement
; Persulfate
; Persulfate activations
; Chemical activation
; 1,4 dioxane derivative
; hydrogen peroxide
; iron oxide
; manganese oxide
; soil organic matter
; aquifer
; chemical method
; degradation
; experimental study
; geochemistry
; hydrogen peroxide
; in situ measurement
; manganese oxide
; oxidation
; reaction rate
; subsurface flow
; sulfate
; adsorption
; anion exchange
; aquifer
; Article
; chemical analysis
; comparative study
; controlled study
; degradation
; electron spin resonance
; gas chromatography
; geochemical analysis
; hydraulic retention time
; inductively coupled plasma mass spectrometry
; oxidation
; priority journal
; sediment
; soil
; X ray diffraction
英文摘要: 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 10% 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. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122148
Appears in Collections: 气候变化事实与影响
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作者单位: Hydrology and Atmospheric Sciences Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States; Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States; State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China
Recommended Citation:
Yan N.,Zhong H.,Brusseau M.L.. The natural activation ability of subsurface media to promote in-situ chemical oxidation of 1,4-dioxane[J]. Water Research,2019-01-01