Pilot-scale bioremediation of PAH-contaminated soils

Pradhan, Salil; Paterek, J. Robert; Liu, B. Y.; Conrad, J.R.; Srivastava, V.J.

doi:10.1007/bf02920473

Cited by 29 publications

(16 citation statements)

References 2 publications

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“…As suggested by the literature (Pradhan et al, 1997(Pradhan et al, , 1998, the soil was firstly remediated by aerobic incubation using two lignolytic microorganisms for 625 days. This first treatment accounted for the reduction of the total soil PAHs content (16 targeted US-EPA PAHs) from 9 to 5 g kg −1 dry soil (DS).…”

Section: Soil Characteristics Before the Phytoremediation Treatmentmentioning

confidence: 99%

In-Situ Phytoremediation of Pahs Contaminated Soils Following a Bioremediation Treatment

Denys

Rollin

Guillot

et al. 2006

Water Air Soil Pollut: Focus

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Phytoremediation of pollutants in soils is an emerging technology, using different soilplant interaction properties. For organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs), phytodegradation seems to be the most promising approach. It occurs mostly through an increase of the microbial activity in the plant rhizosphere, allowing the degradation of organic substances, a source of carbon for soil microbes. Despite a large amount of available data in the literature concerning laboratory and short term PAH phytodegradation experiments, no actual field application of such technique was previously carried out.In the present study, a soil from a former coking plant was used to evaluate the feasibility and the efficiency of PAH phytodegradation in the field during a three years trial and following a bioremediation treatment. Before the phytoremediation treatment, the soil was homogenized and split into six independent plots with no hydrological connections. On four of these plots, different types of common plant species were sowed: mixture of herbaceous species, short cut (P1), long cut (P2), ornamental plants (P3) and trees (P4). Natural vegetation was allowed to grow on the fifth plot (P5), and the last plot was weeded (P6). Each year, representative sampling of two soil horizons (0-50 and 50-100 cm) was carried out in each plot to characterize the evolution of PAHs concentration in soils and in soils solution obtained by lixiviation. Possible impact of the phytoremediation technique on ecosystems was evaluated using different eco-and genotoxicity tests both on the soil solid matrix and on the soil solution.For each soil horizon, comparable decrease of soil total PAHs concentrations were obtained for three plots, reaching a maximum value of 26% of the initial PAHs concentration. The decrease mostly concerned the 3 rings PAHs. The overall low decrease in PAHs content was linked to a drastic decrease in PAHs availability likely due to the bioremediation treatment. However, soil solutions concentration showed low values and no signficant toxicity was characterized. The mixture of the herbaceous species seemed to be the most promising plants to be used in such procedure.

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Section: Soil Characteristics Before the Phytoremediation Treatmentmentioning

confidence: 99%

In-Situ Phytoremediation of Pahs Contaminated Soils Following a Bioremediation Treatment

Denys

Rollin

Guillot

et al. 2006

Water Air Soil Pollut: Focus

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“…Sometimes the oxy-PAHs are even more toxic than the parent compounds, for example, some photooxidation products of PAHs [11,22]. Nevertheless, during the risk assessment of PAC-contaminated sites, only unsubstituted PAHs generally are monitored, most often the 16 PAHs listed as priority pollutants by the U.S. Environmental Protection Agency [23][24][25][26]. However, monitoring degradation processes solely by analyzing unsubstituted PAHs may give misleading results, if other PACs in the soil are degraded to a different degree, or if toxic oxidation products are accumulated during the process.…”

Section: Introductionmentioning

confidence: 99%

Degradation and Formation of Polycyclic Aromatic Compounds During Bioslurry Treatment of an Aged Gasworks Soil

Lundstedt¹,

Haglund²,

Öberg³

2003

Environ Toxicol Chem

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The goals of this study were to investigate the relative degradation rates of polycyclic aromatic compounds (PACs) in contaminated soil, and to assess whether persistent oxidation products are formed during their degradation. Samples were taken on five occasions during a pilot-scale bioslurry treatment of soil from a former gasworks site. More than 100 PACs were identified in the soil, including unsubstituted polycyclic aromatic hydrocarbons (PAHs), alkylated PAHs (alkyl-PAHs), heterocyclic PACs, and oxygenated PAHs (oxy-PAHs), such as ketones, quinones, and coumarins. During the treatment, the low molecular weight PAHs and heterocyclics were degraded faster than the high molecular weight compounds. The unsubstituted PAHs also appear to have degraded more quickly than the corresponding alkyl-PAHs and nitrogen-containing heterocyclics. No new oxidation products that were not present in the untreated soil were identified after the soil treatment. However, oxy-PAHs that were present in the untreated soil were generally degraded more slowly than the parent compounds, suggesting that they were formed during the treatment or that they are more persistent. Two oxidation products, 1-acenaphthenone and 4-oxapyrene-5-one, were found at significantly higher concentrations at the end of the study. Because oxy-PAHs can be acutely toxic, mutagenic, or carcinogenic, we suggest that this group of compounds should also be monitored during the treatment of PAH-contaminated soil.

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“…These permits can be based on concentration levels (mass per unit volume) and/or total mass loads over a given time frame (mass per unit time). Reported removal efficiencies for various water quality parameters are listed in 111,112].…”

Section: Treatment Wetlands For Sediment/surface Water Clean Upmentioning

confidence: 99%

“…Physiochemical factors that determine the suitability of the soil environment as microbial habitats, and thus, sites for biodegradation are given in Table 2. Bacteria are the principal microbiota that mineralize many organic contaminants with numerous studies documenting their degradation capabilities [82,[96][97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112]. The predominant microorganisms are Pseudomonas, Mycobacterium,Actinobacter,Flavobacterium,Arthrobacter,Bacillus,and Nocardia [11,83,113].…”

Section: Soil Microorganismsmentioning

confidence: 99%

Phytoremediation

2003

Advances in Biochemical Engineering/Biotechnology

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Advances in Biochemical Engineering/Biotechnology reviews actual trends in modern biotechnology. Its aim is to cover all aspects of this interdisciplinary technology where knowledge, methods and expertise are required for chemistry, biochemistry, microbiology, genetics, chemical engineering and computer science. Special volumes are dedicated to selected topics which focus on new biotechnological products and new processes for their synthesis and purification. They give the state-of-the-art of a topic in a comprehensive way thus being a valuable source for the next 3 -5 years. It also discusses new discoveries and applications.In general, special volumes are edited by well known guest editors. The managing editor and publisher will however always be pleased to receive suggestions and supplementary information. Manuscripts are accepted in English.In references Advances in Biochemical EngineeringlBiotechnology is abbreviated as Adv Biochem EngidBiotechnol as a journal. Visit the ABE home page at http:lllink.springer.delserieslabel http:l/link.Springer-ny.comlserieslabe1

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Pilot-scale bioremediation of PAH-contaminated soils

Cited by 29 publications

References 2 publications

In-Situ Phytoremediation of Pahs Contaminated Soils Following a Bioremediation Treatment

In-Situ Phytoremediation of Pahs Contaminated Soils Following a Bioremediation Treatment

Degradation and Formation of Polycyclic Aromatic Compounds During Bioslurry Treatment of an Aged Gasworks Soil

Phytoremediation

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