Development of bioreactors for comparative study of natural attenuation, biostimulation, and bioaugmentation of petroleum-hydrocarbon contaminated soil

Safdari, Mohammad-Saeed; Kariminia, Hamid‐Reza; Rahmati, Mahmood; Fazlollahi, Farhad; Polasko, Alexandra; Mahendra, Shaily; Wilding, W. Vincent; Fletcher, Thomas H.

doi:10.1016/j.jhazmat.2017.08.044

Cited by 129 publications

(48 citation statements)

References 35 publications

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“…In the bioremediation of hydrocarbon-polluted soil, several authors showed the reliability of the first-order reaction rate model [8,[26][27][28]. For this model, Equation (1) becomes…”

Section: First-order Reaction Ratementioning

confidence: 99%

“…We observed a slight increase in the dielectric permittivity when the temperature increased and vice versa. We applied formula (8) to model the behavior of dielectric permittivity of the same mixture of sandy soil, partially saturated with water, oil and gas. The results of the modeling are depicted in Figure 11.…”

Section: Geophysical Features For Future Monitoring and Preliminary Mmentioning

confidence: 99%

“…Several studies were carried out in different operative conditions, adopting one of the aforesaid strategies, and aimed to optimize hydrocarbon removal [3,[6][7][8][9]. It is widely known that biostimulation is an easier process to carry out [2,5,10,11].…”

Section: Introductionmentioning

confidence: 99%

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Removal of Diesel Oil in Soil Microcosms and Implication for Geophysical Monitoring

Bosco

Casale

Chiampo

et al. 2019

Water

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Bioremediation of soils polluted with diesel oil is one of the methods already applied on a large scale. However, several questions remain open surrounding the operative conditions and biological strategies to be adopted to optimize the removal efficiency. This study aimed to investigate the environmental factors that influence geophysical properties in soil polluted with diesel oils, in particular, during the biodegradation of this contaminant by an indigenous microbial population. With this aim, aerobic degradation was performed in soil column microcosms with a high concentration of diesel oil (75 g kg −1 of soil); the dielectric permittivity and electrical conductivity were measured. In one of the microcosms, the addition of glucose was also tested. Biostimulation was performed with a Mineral Salt Medium for Bacteria. The sensitivity of the dielectric permittivity versus temperature was analyzed. A theoretical approach was adopted to estimate the changes in the bulk dielectric permittivity of a mixture of sandy soil-water-oil-gas, according to the variations in the oil content. The sensitivity of the dielectric permittivity to the temperature effects was analyzed. The results show that (1) biostimulation can give good removal efficiency; (2) the addition of glucose as a primary carbon source does not improve the diesel oil removal; (3) a limited amount of diesel oil was removed by adsorption and volatilization effects; and (4) the diesel oil efficiency removal was in the order of 70% after 200 days, with different removal percentages for oil components; the best results were obtained for molecules with a low retention time. This study is preparatory to the adoption of geophysical methods to monitor the biological process on a larger scale. Altogether, these results will be useful to apply the process on a larger scale, where geophysical methods will be adopted for monitoring.

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“…In the bioremediation of hydrocarbon-polluted soil, several authors showed the reliability of the first-order reaction rate model [8,[26][27][28]. For this model, Equation (1) becomes…”

Section: First-order Reaction Ratementioning

confidence: 99%

Section: Geophysical Features For Future Monitoring and Preliminary Mmentioning

confidence: 99%

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Removal of Diesel Oil in Soil Microcosms and Implication for Geophysical Monitoring

Bosco

Casale

Chiampo

et al. 2019

Water

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“…In this area, previous studies have demonstrated that good removal efficiency can be achieved when indigenous bacteria are stimulated with mineral salt media in order to aerobically biodegrade soil pollutants without any addition of other carbon sources [9,10].Given the multitude of findings, it can be useful to know the kinetics of the process for planning in situ remediation activities. Moreover, optimization of the process in terms of the optimal operative parameters for a given system of soil pollution can be of help to maximize the achievable results.Several studies [11][12][13][14][15] have shown that hydrocarbon removal can be modeled with first-or second-order reaction kinetics. The complexity of the biological process explains the different results produced by these models.…”

mentioning

confidence: 99%

“…Several studies [11][12][13][14][15] have shown that hydrocarbon removal can be modeled with first-or second-order reaction kinetics. The complexity of the biological process explains the different results produced by these models.…”

mentioning

confidence: 99%

Kinetics and Optimization by Response Surface Methodology of Aerobic Bioremediation. Geoelectrical Parameter Monitoring

Raffa¹,

Chiampo²,

Godio³

et al. 2020

Applied Sciences

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This study aimed to investigate the kinetics of an aerobic bioremediation process of diesel oil removal by indigenous microorganisms, and to define the optimal operative conditions by means of response surface methodology. This was carried out by setting up a series of microcosms (200 g of soil), polluted with the same diesel oil concentration (70 g·kg −1 of soil), but with different water contents (u%) and carbon to nitrogen (C/N) ratios. The process was monitored by: (1) residual diesel oil concentration, to measure the removal efficiency, and (2) fluorescein production, to check the microbial activity. These two parameters were the objective variables used for the analysis of variance (ANOVA) and response surface methodology (RSM). The results allowed the interactions between u% and C/N to be defined and the optimal range to be adopted for each. The process kinetics was modeled with first-and second-order reaction rates; slightly better results were achieved for the second-order model in terms of parameter variability. Biological processes like degradation may have effects on dielectric properties of soil; an open-ended coaxial cable was used to measure the dielectric permittivity of microcosm matrices at the start and after 130 days of bioremediation. The evolution of the real and the imaginary components of dielectric permittivity provided results that supported the evidence of a biodegradation process in progress.This oil is a mixture of several hydrocarbons, with gross composition of 2/3 alkanes and 1/3 aromatic hydrocarbons, all toxic compounds for living organisms. Its removal by biological processes has been the object of many studies [1-6] and many solutions have been given in terms of operative conditions, kind of microorganisms, and biological strategies. Moreover, soil properties can influence the process, which means that there is no one optimum solution. Biostimulation has proven to be one of the best solutions in terms of easiness and management of application, relative to the achieved results [2,3,7,8]. In this area, previous studies have demonstrated that good removal efficiency can be achieved when indigenous bacteria are stimulated with mineral salt media in order to aerobically biodegrade soil pollutants without any addition of other carbon sources [9,10].Given the multitude of findings, it can be useful to know the kinetics of the process for planning in situ remediation activities. Moreover, optimization of the process in terms of the optimal operative parameters for a given system of soil pollution can be of help to maximize the achievable results.Several studies [11][12][13][14][15] have shown that hydrocarbon removal can be modeled with first-or second-order reaction kinetics. The complexity of the biological process explains the different results produced by these models. The study of kinetics can be used to estimate biodegradation duration, considering the time to obtain acceptable pollutant removal.Process optimization can be based on factorial analysis and response surface methodolo...

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Organic Pollutants of Global Concern in Groundwater Resources and Remediation Measures

Peyravi

Nikpour

2021

Groundwater Geochemistry

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Development of bioreactors for comparative study of natural attenuation, biostimulation, and bioaugmentation of petroleum-hydrocarbon contaminated soil

Cited by 129 publications

References 35 publications

Removal of Diesel Oil in Soil Microcosms and Implication for Geophysical Monitoring

Removal of Diesel Oil in Soil Microcosms and Implication for Geophysical Monitoring

Kinetics and Optimization by Response Surface Methodology of Aerobic Bioremediation. Geoelectrical Parameter Monitoring

Organic Pollutants of Global Concern in Groundwater Resources and Remediation Measures

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