Passive volatilization behaviour of gasoline in unsaturated soils

Gidda, Tej; Stiver, Warren; Zytner, Richard G.

doi:10.1016/s0169-7722(99)00025-x

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…This value can be considered as a critical level, or temperature threshold, necessary for volatilization of gasoline. This observation supports the results reported by Gidda et al (1999) who observed volatilization at sub-zero temperatures. As gasoline is a mixture of different components, basic knowledge of the relationships between the volatility or vapor pressure and temperature for individual components of gasoline is of fundamental importance.…”

Section: Characteristics Of Gasoline Volatilizationsupporting

confidence: 93%

“…3. The characteristics and phenomena associated with gasoline volatilization from soils observed in this study support the conclusions obtained by Gidda et al (1999) The time elapsed for the drastic drop of total concentration was approximately 2,000 min in most cases under the experimental conditions as illustrated by vertical dashed lines in Fig. 3.…”

Section: Characteristics Of Gasoline Volatilizationsupporting

confidence: 89%

“…Its behavior in soils is very complicated and difficult to predict because many factors related to the physicochemical properties of soil, gasoline itself, and environmental conditions may affect transport and degradation of gasoline in soils (e.g., Gidda et al 1999). In addition, different components are known to have different risks to human health (Edwards et al 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Arthurs et al (1995) studied the volatilization of gasoline from soil and reported that the rate of volatilization of liquid in the presence of soil is about two orders of magnitude slower than from the pure liquid, and that the vaporization rate increases as the vapor pressure of the compound increases. Gidda et al (1999) performed an experimental investigation of the effects of initial gasoline content, water content, and temperature (room and sub-zero) on volatilization behavior of artificial gasoline in three types of soil. Some useful information about the effects of these three factors on volatilization of artificial gasoline in unsaturated soils was provided.…”

Section: Introductionmentioning

confidence: 99%

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Volatilization properties of gasoline components in soils

et al. 2010

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Understanding the volatilization properties of gasoline components in soils is of fundamental importance in the field of geoenvironments. A series of experiments were performed to investigate the effects of temperature, soil water content, soil organic matter content, as well as mean particle size on volatilization rate of total petroleum hydrocarbons (TPH) and the paraffin (n-paraffin and isoparaffin), olefin, naphthene, and aromatic (PONA) components in four typical Japanese soils. The results of this study can be summarized as follows. (1) Volatilization rate of gasoline in a soil is concentration-dependent; extensive volatilization occurs above a certain threshold, while volatilization becomes very slow below this threshold.(2) Compared to other factors, temperature and soil organic matter content have greater effects on volatilization rate of gasoline in soils. The volatilization rate is proportional to temperature, but inversely related to soil organic matter content. (3) The characteristics of time-dependent decreases of TPH and PONA components in soils are similar. The volatilization rate of olefin is higher than those of other components. In addition, volatilization of olefin is also more sensitive to temperature as well as organic matter content.

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Section: Characteristics Of Gasoline Volatilizationsupporting

confidence: 93%

Section: Characteristics Of Gasoline Volatilizationsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Volatilization properties of gasoline components in soils

et al. 2010

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“…Studies conducted by Harper et al (1998) and Gidda et al (1999) suggest that excess soil water limits the mass transfer for SVE processes, yet this same water is beneficial to the microbial environment for bioventing. Biodegradation rates are greatly impacted by the types of microorganisms present in the soil (Franzluebbers, 2004).…”

Section: Introductionmentioning

confidence: 99%

Large Scale Bioventing Degradation Rates of Petroleum Hydrocarbons and Determination of Scale-up Factors

Mosco¹,

Zytner²

2017

Preprint

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Bioventing is a cutting edge, non-destructive treatment method that uses indigenous soil microorganisms in-situ to remediate petroleum hydrocarbons in the unsaturated soil zone.Transferring the application of this technology to a field environment still has some uncertainties due to scale-up challenges. In order to identify the scale-up factor, a 80 kg soil reactor system was developed, consisting of a custom made reactor, climate chamber, low flow venting system and an off gas capture device. Sandy and clayey soils were tested with known concentrations of spiked synthetic gasoline. Various environmental conditions were monitored which included: moisture levels, pH, microbial levels, nutrient and oxygen levels. Results show a second stage degradation rate similar to the degradation rate obtained from research conducted with a 4 kg reactor, giving an average scale-up factor of 2.3±0.4. The completed research shows that working with a 80 kg laboratory reactor is feasible, yet not always necessary for the development of scale-up factors. A complimentary study with aged soil contaminants was preformed and yielded degradation rates that were significantly reduced.

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Desorption and Biofiltration for the Treatment of Residual Organic Gases Evolved in Soil Decontamination Processses

et al. 2007

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In order to analyze the combination of a rotary kiln and a biofilter in soil decontamination processes, a previously characterized soil was artificially contaminated with toluene, ethylbenzene or p-xylene. The desorption peak of the three compounds occurred very quickly at 20°C, and consequently, the outlet gas flow from the rotary kiln was initially divided into two different flows. One of them was reduced to a 1/9 th fraction of the total flow to be treated in an independent biofiltration system specially acclimated to each contaminant. The sharp desorption peak observed for the three compounds at the outlet of the kiln involved a very high inlet concentration fed into the biofilters in a very short period of time (shorter than 3 h). Consequently, the removal efficiency for toluene was lower than 70 %. However, the removal efficiencies for ethylbenzene and xylene were always higher than 65 %.

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Passive volatilization behaviour of gasoline in unsaturated soils

Cited by 17 publications

References 16 publications

Volatilization properties of gasoline components in soils

Volatilization properties of gasoline components in soils

Large Scale Bioventing Degradation Rates of Petroleum Hydrocarbons and Determination of Scale-up Factors

Desorption and Biofiltration for the Treatment of Residual Organic Gases Evolved in Soil Decontamination Processses

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