The effects of <i>in situ</i> chemical oxidation on microbiological processes: A review

Sahl, Jason W.; Munakata-Marr, Junko

doi:10.1002/rem.20091

Cited by 58 publications

(36 citation statements)

References 57 publications

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“…Previous reviews echoed the "wait and see" mentality common to earlier experiments, where, following chemical oxidation, the regeneration of biomass was merely monitored without stimulation (Sahl and Munakata-Marr 2006;Waddell and Mayer 2003). However, in the open system encountered in situ, even local sterilization with chemical oxidants will eventually be reversed as groundwater upstream will always transport indigenous microorganisms (Brown et al 2009).…”

Section: Introductionmentioning

confidence: 98%

Efforts to improve coupled in situ chemical oxidation with bioremediation: a review of optimization strategies

et al. 2010

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Purpose In order to provide highly effective yet relatively inexpensive strategies for the remediation of recalcitrant organic contaminants, research has focused on in situ treatment technologies. Recent investigation has shown that coupling two common treatments-in situ chemical oxidation (ISCO) and in situ bioremediation-is not only feasible but in many cases provides more efficient and extensive cleanup of contaminated subsurfaces. However, the combination of aggressive chemical oxidants with delicate microbial activity requires a thorough understanding of the impact of each step on soil geochemistry, biota, and contaminant dynamics. In an attempt to optimize coupled chemical and biological remediation, investigations have focused on elucidating parameters that are necessary to successful treatment. In the case of ISCO, the impacts of chemical oxidant type and quantity on bacterial populations and contaminant biodegradability have been considered. Similarly, biostimulation, that is, the adjustment of redox conditions and amendment with electron donors, acceptors, and nutrients, and bioaugmentation have been used to expedite the regeneration of biodegradation following oxidation. The purpose of this review is to integrate recent results on coupled ISCO and bioremediation with the goal of identifying parameters necessary to an optimized biphasic treatment and areas that require additional focus. Conclusions and recommendations Although a biphasic treatment consisting of ISCO and bioremediation is a feasible in situ remediation technology, a thorough understanding of the impact of chemical oxidation on subsequent microbial activity is required. Such an understanding is essential as coupled chemical and biological remediation technologies are further optimized.

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Section: Introductionmentioning

confidence: 98%

Efforts to improve coupled in situ chemical oxidation with bioremediation: a review of optimization strategies

et al. 2010

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“…For initial concentrations of hydrogen peroxide equal to 100 ppm and iron of 30 ppm, 99 percent of inactivation was obtained within less than 30 minutes. A literature review (Sahl & Munakata-Marr, 2006) of chemical oxidation treatments coupled with bioremediation processes suggested that biological processes may be adversely affected in the short term, but a rebound of biological activity can be expected later on as long as low concentrations of catalyzed hydrogen peroxide have been used.…”

Section: •−mentioning

confidence: 99%

Destruction of Aspergillus versicolor, Penicillium chrysogenum, Stachybotrys chartarum, and Cladosporium cladosporioides spores using chemical oxidation treatment process

Yaari

Tachiev

Dean

et al. 2007

Remediation Journal

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The survival of aqueous suspensions of Penicillium chrysogenum, Stachybotrys chartarum, Aspergillus versicolor, and Cladosporium cladosporioides spores was evaluated using various combinations of hydrogen peroxide and Fe 2+ as catalyst. Spore concentrations of 10 6 -10 7 colony forming units per milliliter (CFU/mL) were suspended in water and treated with initial hydrogen peroxide and iron concentrations ranging from 0.05 to 10 percent and 100 to 200 ppm, respectively. After four hours of reaction time, samples were plated on agar plates, and the viable fraction of spores was determined by the number of colonies formed. Hydrogen peroxide concentrations above 50,000 ppm resulted in greater than 6-log 10 reduction of viable spores for both catalyzed and noncatalyzed reactions. Iron had a strong catalytic effect when added to solutions with hydrogen peroxide concentration above 5,000 ppm and resulted in two to three orders of magnitude greater reduction compared to hydrogen peroxide alone. Additional samples taken after 24 hours of reaction time showed that the effect of the addition of 100 and 200 ppm of Fe 2+ catalyst was mostly kinetic, and noncatalyzed hydrogen peroxide had sporicidal effects similar to catalyzed hydrogen peroxide.This study identified initial reagent concentrations of hydrogen peroxide and Fe 2+ that accomplish a 6-log 10 reduction of viable mold spores within reaction times of 4 and 24 hours. O

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“…Chlorinated aliphatic hydrocarbons, such as trichloroethylene are also among the most difficult contaminants to remove, particularly when their dense non-aqueous-phase liquid (DNAPL) sources remain in the subsurface. Advanced oxidation processes, such as in situ chemical oxidation (ISCO) is a remediation technology that proved to be effective in treating soils and groundwater matrices contaminated with organic pollutants, such as chlorinated solvents [1][2][3][4][5][6]. In situ chemical oxidation is based on the introduction of a chemical oxidant into the subsurface for transforming contaminants in soil and ground-water into less harmful chemical substances.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicate that although microbial communities may potentially be affected by ISCO on the short term, a rebound of bioremediation and microbial biomass can be detected. ISCO can be coupled successfully with bioremediation in field applications and it may be a costeffective method for achieving risk-based site remediation goals [6].…”

Section: Introductionmentioning

confidence: 99%

“…Many carbon-based pollutants can be degraded in aerobic systems however; some of these processes are cometabolic. Cometabolism is the transformation of an organic compound in a metabolic process in which an organic compound is converted into different metabolic products by the induction of enzymes but does not serve as a source of energy or carbon to the microorganism [6]. For many recalcitrant contaminants it is a useful option to initiate the degradation.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen peroxide oxidation for in situ remediation of trichloroethylene – from the laboratory to the field

Fekete-Kertész

Molnár

Atkári

et al. 2013

Per. Pol. Chem. Eng.

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The effects of in situ chemical oxidation on microbiological processes: A review

Cited by 58 publications

References 57 publications

Efforts to improve coupled in situ chemical oxidation with bioremediation: a review of optimization strategies

Efforts to improve coupled in situ chemical oxidation with bioremediation: a review of optimization strategies

Destruction of Aspergillus versicolor, Penicillium chrysogenum, Stachybotrys chartarum, and Cladosporium cladosporioides spores using chemical oxidation treatment process

Hydrogen peroxide oxidation for in situ remediation of trichloroethylene – from the laboratory to the field

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