Kinetics of Heat-Assisted Persulfate Oxidation of Methyl <i>tert</i>-Butyl Ether (MTBE)

Huang, Kun-Chang; Couttenye, Richard A.; Hoag, George E.

doi:10.1080/20025891107717

Cited by 40 publications

(49 citation statements)

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“…Highly reactive species such as SO 4 À c and HOc are generated upon decomposition of sodium persulfate. 29,39 These species are effective in degrading complex organic compounds and oxidize sulde minerals present in shale. 39 Consequently, such degradation of shale organic matter and sulde minerals may mobilize metals and other contaminants complexed within these matrixes to solution, 40 consistent with the measured high concentrations of metals (except Ba) in the leachate of the E5 treatment.…”

Section: Effect Of Oxidant On Metal Releasementioning

confidence: 99%

Geochemical conditions conducive for retention of trace elements and radionuclides during shale–fluid interactions

Mehta

Kocar

2019

Environ. Sci.: Processes Impacts

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Section: Effect Of Oxidant On Metal Releasementioning

confidence: 99%

Geochemical conditions conducive for retention of trace elements and radionuclides during shale–fluid interactions

Mehta

Kocar

2019

Environ. Sci.: Processes Impacts

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“…Sodium persulfate (SPS) (or sodium peroxydisulfate) is a relatively new oxidant used in remediation, and is promising because it has a longer half‐life in the subsurface than ozone or hydrogen peroxide. When activated the persulfate anion (S 2 O 8 2− ) forms sulfate radicals (SO 4 •− ), which are nearly as strong an oxidant as the hydroxyl radical 19. Reaction 2 shows the activation of persulfate with Fe 2+ .…”

Section: Introductionmentioning

confidence: 99%

The effect of three chemical oxidants on subsequent biodegradation of 2,4‐dinitrotoluene (DNT) in batch slurry reactors

Cassidy

Northup

Hampton

2009

J of Chemical Tech & Biotech

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“…Rebound occurred after persulfate injection ceased, and significant residual concentrations remained after treatment [28]. Their study results indicate that persulfate preferentially oxidized alkene and substituted phenyl compounds over alkanes, with 37 of 59 contaminants having 90% or greater removal efficiencies after 72 hours in solution with 5 g/L of 40C activated persulfate [50].…”

Section: Halogenated Compoundsmentioning

confidence: 99%

“…Only heat-activated persulfate also fully oxidized the degradation products of MTBE (within approximately 300 h) [65]. Huang et al [50] found the half-life of 5 ppm MTBE to be less than one hour at an 8 g/L persulfate dose when heated to 40C.…”

Section: Oil and Gasmentioning

confidence: 99%

Transport of Heat Activated Persulfate and Its Application for In-situ Chemical Oxidation of Residual Trichloroethylene

Quig¹

2000

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In situ chemical oxidation is a promising technology for the remediation of persistent subsurface contamination. Increasingly, the persulfate ion is being studied for use in these systems, both on its own as a strong oxidant and as the precursor to the even more reactive sulfate radical. Persulfate has been shown to treat a wide range of contaminants, from traditional Superfund contaminants such as chlorinated solvents to emerging pharmaceutical contaminants. Additionally, persulfate ISCO can be tailored to site and pollutant specific characteristics based on the method of persulfate activation (e.g., energy and catalysis activation) to the sulfate radical. Thermal activation of persulfate is particularly promising because it can be easily controlled, requires no additional reagents, and commonly creates only non-toxic end products. While persulfate in-situ chemical oxidation technology is being commercially used, a mechanistic study of the physical and chemical processes controlling the effectiveness of this remedial approach is not well documented in the literature. Published work characterizing persulfate ISCO largely focuses on reactions in aqueous, batch systems, which fail to provide crucial design data when working with ever transient, multi-phase groundwater systems.The purpose of this research was twofold. Initial studies characterized the overall transport behavior of unactivated and thermally-activated persulfate (20, 60, and 90°C) in one-dimensional soil column systems packed with a natural sandy porous media. This necessitated the development of a flow-through, temperature-controlled, continuousii injection system for the delivery of heat-activated persulfate. Finally, as a proof of concept, experiments were conducted to investigate persulfate ISCO as a remedial approach for residual-phase trichloroethylene (TCE), a commonly detected, persistent subsurface contaminant. At all activation temperatures investigated, persulfate exhibited ideal transport behavior with negligible differences in the observed breakthrough curves of persulfate ion and nonreactive tracers in miscible displacement experiments. Additionally, moment analysis of the breakthrough curves measured for persulfate ion in solution indicated negligible interaction of persulfate with the sandy material under steady-state flow(average retardation factor equaled 1.00 ± 0.021). Persulfate ISCO for residual-phase trichloroethylene (TCE) was characterized at two flow rates, 0.2 mL/min and 0.5 mL/min, resulting in two degrees of apparent persulfate activation, 39.5% and 24.6%, respectively.Both ISCO soil column systems showed an initial, long-term plateau in effluent concentrations measured for TCE indicating steady-state dissolution of pure phase TCE.Effluent concentrations of TCE began decreasing after 75 and 100 pore volumes (normalized for the residual fraction of TCE in individual soil columns) in the 39.5% and 24.6% activated persulfate columns as compared to 110 pore volumes in the control study (flushed with electrolyte only). Pseudo...

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Kinetics of Heat-Assisted Persulfate Oxidation of Methyl tert-Butyl Ether (MTBE)

Cited by 40 publications

References 0 publications

Geochemical conditions conducive for retention of trace elements and radionuclides during shale–fluid interactions

Geochemical conditions conducive for retention of trace elements and radionuclides during shale–fluid interactions

The effect of three chemical oxidants on subsequent biodegradation of 2,4‐dinitrotoluene (DNT) in batch slurry reactors

Transport of Heat Activated Persulfate and Its Application for In-situ Chemical Oxidation of Residual Trichloroethylene

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