SITE Demonstration of Slurry-Phase Biodegradation of PAH Contaminated Soil

Lewis, Ronald

doi:10.1080/1073161x.1993.10467149

Cited by 33 publications

(12 citation statements)

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“…Antizar-Ladislao et al (2006) reported that for small, medium and large PAHs maximum achievable degradation in an aged coal tar contaminated soil during composting optimal moisture content was in the range of 60-80% at 38°C. Adding water to the soil helps in PAH degradation (Lewis 1992) and increasing the ratio of water to soil to a certain extent can increase the mineralization rate of phenanthrene, with the maximum extent of mineralization observed occurring at a range of moisture contents of 20-50%. Soil slurries with moisture contents of 20% or greater, but less than 50%, were recommended for bioassay determinations of total contaminant bioavailability due to greater overall mineralization and improved reproducibility (Doick and Semple 2003).…”

Section: Introductionmentioning

confidence: 97%

Effects of soil amendment with different carbon sources and other factors on the bioremediation of an aged PAH-contaminated soil

et al. 2009

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Carbon supplementation, soil moisture and soil aeration are believed to enhance in situ bioremediation of PAH-contaminated soils by stimulating the growth of indigenous microorganisms. However, the effects of added carbon and nitrogen together with soil moisture and soil aeration on the dissipation of PAHs and on associated microbial counts have yet to be fully assessed. In this study the effects on bioremediation of carbon source, carbon-to-nitrogen ratio, soil moisture and aeration on an aged PAH-contaminated agricultural soil were studied in microcosms over a 90-day period. Additions of starch, glucose and sodium succinate increased soil bacterial and fungal counts and accelerated the dissipation of phenanthrene and benzo(a)pyrene in soil. Decreases in phenanthrene and benzo(a)pyrene concentrations were effective in soil supplemented with glucose and sodium succinate (both 0.2 g C kg(-1) dry soil) and starch (1.0 g C kg(-1) dry soil). The bioremediation effect at a C/N ratio of 10:1 was significantly higher (P< 0.05) than at a C/N of either 25:1 or 40:1. Soil microbial counts and PAH dissipation were lower in the submerged soil but soil aeration increased bacterial and fungal counts, enhanced indigenous microbial metabolic activities, and accelerated the natural degradation of phenanthrene and benzo(a)pyrene. The results suggest that optimizing carbon source, C/N ratio, soil moisture and aeration conditions may be a feasible remediation strategy in certain PAH contaminated soils with large active microbial populations.

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Section: Introductionmentioning

confidence: 97%

Effects of soil amendment with different carbon sources and other factors on the bioremediation of an aged PAH-contaminated soil

et al. 2009

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“…Previous research has shown that bacteria and fungi both have the ability to transform PAHs [12], including high-molecular-weight compounds [13,14]. For this reason, bioremediation techniques such as slurry reactors and land farming have been used to treat contaminated materials [15,16]. Many studies on the degradation of PAHs have focused on individual compounds; however, in application, most sites contain numerous cocontaminants [4,17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mixtures of Polycyclic Aromatic Hydrocarbons and Sediments on Fluoranthene Biodegradation Patterns

Beckles

Ward

Hughes

1998

Environ Toxicol Chem

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The biodegradation of fluoranthene, alone and in mixtures with naphthalene and acenaphthene, was studied in systems with and without sediments. In sediment-free systems, fluoranthene was not degraded when present alone or in combination with acenaphthene but was degraded when combined with naphthalene. Naphthalene and acenaphthene degradation were not influenced by fluoranthene. In sediment-containing systems, fluoranthene degradation occurred only in the presence of naphthalene. After complete degradation of naphthalene, fluoranthene degradation stopped. Experiments using all three polycyclic aromatic hydrocarbons in both sediment-free and -containing systems showed results similar to those obtained using pairs.

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“…Numerous investigations have shown that a very high removal efficiency of PAHs could be obtained from slurry phase reactors [12][13][14][15][16]. Moreover, with a slurry, the contact between microorganisms, contaminants, nutrients and oxygen is the prevailing factor for the removal of PAHs, with the rate potentially depending on the physical access by microorganisms to the molecules [7].…”

Section: Resultsmentioning

confidence: 99%

Effect of Mixing Methods on the Biodegradation of Sorbed Naphthalene and Phenanthrene in Soils

Kim¹,

Moon²,

Chung³

et al. 2010

Environmental Engineering Research

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The purpose of this study was to investigate the effect of mixing methods on the biodegradation of sorbed naphthalene and phenanthrene in soils. Biodegradation was initiated by inoculating Pseudomonas sp. KM1 into equilibrated soil slurry vials. Four different mixing methods, including no mixing, orbital shaking, rolling and rotating were utilized to enhance the biodegradation of both naphthalene and phenanthrene. The experimental results showed that the sorbed compounds were more effectively biodegraded with rolling and rotating mixing methods. The sorbed naphthalene concentrations were reduced to 0 mg/kg via the rolling and rotating methods. However, with no mixing and the orbital shaking methods, the sorbed naphthalene concentrations were comparatively high, ranging from 2.59 to 20.45 mg/kg. Similar trends were observed for the biodegradation of phenanthrene, but the concentrations remaining were higher than those of naphthalene, due to the limited bioavailability of the sorbed phenanthrene. The rolling and rotating mixing methods are suggested can distribute bacteria uniformly in the slurry system; improve the mass transfer rate and the probability of physical contact between bacteria and the sorbed contaminants, resulting in higher bioavailability of the contaminants.

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SITE Demonstration of Slurry-Phase Biodegradation of PAH Contaminated Soil

Cited by 33 publications

References 0 publications

Effects of soil amendment with different carbon sources and other factors on the bioremediation of an aged PAH-contaminated soil

Effects of soil amendment with different carbon sources and other factors on the bioremediation of an aged PAH-contaminated soil

Effect of Mixtures of Polycyclic Aromatic Hydrocarbons and Sediments on Fluoranthene Biodegradation Patterns

Effect of Mixing Methods on the Biodegradation of Sorbed Naphthalene and Phenanthrene in Soils

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