EPA SITE Demonstration of the BioTrol Soil Washing Process

Stinson, Mary K.; Skovronek, H.S.; Ellis, William D.

doi:10.1080/10473289.1992.10466973

Cited by 20 publications

(13 citation statements)

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“…There are many methods available to remediate a hazardous waste site soil (18)(19)(20)(21)(22). The presumptive treatments for soils, sediments, and sludge contaminated with organics at wood treatment sites are bioremediation, thermal desorption, and incineration (19).…”

mentioning

confidence: 99%

Genotoxicity of bioremediated soils from the Reilly Tar site, St. Louis Park, Minnesota.

Hughes

Claxton

Brooks

et al. 1998

Environ Health Perspect

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An in vitro approach was used to measure the genotoxicity of creosote-contaminated soil before and after four bioremediation processes. water-soluble mutagens accounted for 40% of the total mutagenic activity and they were stable at room temperature. The mutagenic activity in the bioslurry and biopile samples was due to either the processes themselves or to the added sludge/manure amendments. The in vitro approach was effective in monitoring bioremediated soils for genotoxicity and will be useful in future laboratory and in situ studies.

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mentioning

confidence: 99%

Genotoxicity of bioremediated soils from the Reilly Tar site, St. Louis Park, Minnesota.

Hughes

Claxton

Brooks

et al. 1998

Environ Health Perspect

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“…In the actual operation of slurry bioreactors, 10±30% soil contents (ε a = 0.1±0.3) have been widely used. 4,5 It has also been reported that too high an amount of soil in the reactor inhibited the degradation of contaminants. 13 …”

Section: Estimation Of Optimal Water Requirementmentioning

confidence: 97%

“…In a conventional slurry bioreactor system, the amount of water used for separation and washing of the soil mixture is over ®ve times more than that required for the reactor operation itself. 5,19 In the present reactor system, the soil mixture including sand can be treated without separation and washing and, therefore, less water is required. The amount of water required ranged from 0.42 to 2.3 dm 3 kg À1 soil depending on the soil texture.…”

Section: Estimation Of Reactor Capacitymentioning

confidence: 99%

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Evaluation of drum bioreactor performance used for decontamination of soil polluted with polycyclic aromatic hydrocarbons

Woo

Park

1999

J. Chem. Technol. Biotechnol.

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A laboratory-scale drum bioreactor system was used to study engineering aspects of soil bioremediation. Polycyclic aromatic hydrocarbons (PAHs) were chosen as contaminants in soil. In the operation of the reactor, different mixing strategies were applied according to the size of soil without separate washing of sand. The effect of the water content of the soil mixture on solid mixing time and phenanthrene degradation rate was of particular interest. At 20% water content, which was below the saturation level, the mixing ef®ciency of soil and the degradation rate of phenanthrene was lower than those at 30% or 40% water content. Optimal water content was variable according to the soil texture. The drum bioreactor was operated under optimal water content and PAH concentration (¯uorene, phenanthrene, anthracene, pyrene) and microbial numbers were measured in each soil phase (sediment and suspension). Over 95% of PAHs with three or four rings (¯uorene, phenanthrene, anthracene, pyrene) were degraded at 270 mg kg À1 soil within 20 days. The degradation rate of PAHs in the suspension phase was higher than that in sediment phase.

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“…1,[7][8][9][10][11][12] One of the key issues addressed while developing the technology of decontamination of soils, sediments, and aquifer materials using a soil-washing reactor is related to the study of interactions of hydrophobic pollutants at the solid-water interface. 13,14 More likely than not, the physicochemical interactions, including sorption, desorption, and volatilization, are of utmost importance in deciding the ultimate fate process of the pollutant in an aquatic environment.…”

Section: Discussionmentioning

confidence: 99%

Washing of Marine Coastal Sand in a Batch Reactor: Sorption and Desorption of BTEX

Rao

Swaminathan

Asolekar

2001

Journal of the Air & Waste Management Association

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This study addresses the issues related to decontamination of marine beach sand accidentally contaminated by petroleum products. Sorption and desorption of BTEX (i.e., benzene, toluene, ethylbenzene, and xylene) onto the sand from Uran Beach, located near the city of Mumbai, India, were studied, and isotherms were determined using the bottle point method to estimate sorption coefficients. Alternatively, QSARs (i.e., quantitative structure activity relationships) were developed and used to estimate the sorption coefficients. Experiments for kinetics of volatilization as well as for kinetics of sorption and desorption in the presence of volatilization were conducted in a fabricated laboratory batch reactor. A mathematical model describing the fate of volatile hydrophobic organic pollutants like BTEX (via sorption and desorption in presence of volatilization) in a batch sediment-washing reactor was proposed. The experimental kinetic data were compared with the values predicted using the proposed models for sorption and desorption, and the optimum values of overall mass transfer coefficients for sorption (K s a s ) and desorption (K d a d ) were estimated. This was achieved by minimization of errors while using the sorption coefficients (K p ) obtained from either laboratory isotherm studies or the QSARs developed in the present study. Independent experimental data were also collected and used for calibration of the model for volatilization, and the values of the overall mass transfer coefficient for volatilization (K g a g ) were estimated for BTEX. In these exercises of minimization of errors, comparable cumulative errors were obtained from the use of K p values derived from experimental isotherms and QSARs.

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EPA SITE Demonstration of the BioTrol Soil Washing Process

Cited by 20 publications

References 1 publication

Genotoxicity of bioremediated soils from the Reilly Tar site, St. Louis Park, Minnesota.

Genotoxicity of bioremediated soils from the Reilly Tar site, St. Louis Park, Minnesota.

Evaluation of drum bioreactor performance used for decontamination of soil polluted with polycyclic aromatic hydrocarbons

Washing of Marine Coastal Sand in a Batch Reactor: Sorption and Desorption of BTEX

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