Hydrocarbon Degradation in Soils and Methods for Soil Biotreatment

Morgan, Phil G.; Watkinson, R. J.

doi:10.3109/07388558909148196

Cited by 202 publications

(110 citation statements)

References 95 publications

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“…The application of the bioremediation procedure reduced by 91% the total concentration of hydrocarbons. Similar microbial degradation rates were reported in previous studies (Bossert and Bartha 1984;Morgan and Watkinson 1989;Atlas and Bartha 1992;Salanitro et al 1997;Suguira et al 1997). Aliphatic compounds predominated over aromatic ones and represented approximately 73% (UTR) and 89% (TR) of the quantified hydrocarbons.…”

Section: Physicochemical Analyses Of Soil Samplessupporting

confidence: 78%

Bioassays with terrestrial and aquatic species as monitoring tools of hydrocarbon degradation

Bori¹,

Vallès²,

Ortega³

et al. 2016

Environ Sci Pollut Res

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In this study chemical analyses and ecotoxicity tests were applied for the assessment of a heavily hydrocarbon-contaminated soil prior and after the application of a remediation procedure that consisted in the stimulation of soil autochthonous populations of hydrocarbon degraders in staticventilated biopiles. Terrestrial bioassays were applied in mixtures of test soils and artificial control soil and studied the survival and reproduction of Eisenia fetida and the avoidance response of E. fetida and Folsomia candida. Effects on aquatic organisms were studied by means of acute tests with Vibrio fischeri, Raphidocelis subcapitata and Daphnia magna performed on aqueous elutriates from test soils. The bioremediation procedure led to a significant reduction in the concentration of hydrocarbons (from 34264 mg kg -1 to 3074 mg kg -1 i.e. 91% decrease) and toxicity although bioassays were not able to report a percentage decrease of toxicity as high as the percentage reduction. Sublethal tests proved the most sensitive terrestrial bioassays and avoidance tests with earthworms and springtails showed potential as monitoring tools of hydrocarbon remediation due to their high sensitivity and short duration. The concentrations of hydrocarbons in water extracts from test soils were 130 µg L -1 and 100 µg L -1 before and after remediation, respectively. Similarly to terrestrial tests, most aquatic bioassays detected a significant reduction in toxicity, which was almost negligible at the end of the treatment. D. magna survival was the most affected by soil elutriates although toxicity to the crustacean was associated to the salinity of the samples rather than to the concentration of hydrocarbons. Ecotoxicity tests with aqueous soil elutriates proved less relevant in the assessment of hydrocarbon-contaminated soils due to the low hydrosolubility of hydrocarbons and the influence of the physicochemical parameters of the aquatic medium.

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Section: Physicochemical Analyses Of Soil Samplessupporting

confidence: 78%

Bioassays with terrestrial and aquatic species as monitoring tools of hydrocarbon degradation

Bori¹,

Vallès²,

Ortega³

et al. 2016

Environ Sci Pollut Res

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“…The soil was not sterilized in order to reproduce the natural environment. Besides, soil sterilization can modify its physical structure, chemical composition or catalytic properties (12, 1) and the indigenous soil microorganisms constitute a heterogeneous microbial community necessary to increase the efficiency of gasoline biodegradation process (11).…”

Section: Resultsmentioning

confidence: 99%

Gasoline biodegradation in different soil microcosms

Cunha¹,

Leite²

2000

Braz. J. Microbiol.

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The objective of this study was to evaluate gasoline biodegradation in batch soil microcosms. Microorganisms able to grow in the presence of gasoline were isolated from soil. Several treatment systems were performed using both isolated strains and Pseudomonas putida obtained from a culture collection. The treatment system using only autochthonous microflora (system 1) presented an average value of degradation of 50%. The association of Pseudomonas putida, Burkholderia cepacia, Pseudomonas alcaligenes and the native soil microflora (system 13) presented significant percentage of removal of n-undecane (88.7), n-dodecane (61.3) and n-tridecane (66.7). According to these results, systems 1 and 13 revealed considerable potential for application in bioremediation treatments.

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“…Contaminated soils are excavated and spread on a pad with a built-in system to collect any 'leachate' or contaminated liquids that seep out of contaminant-soaked soil. In some cases, reduction of contaminant concentrations actually may be attributed more to volatilisation than biodegradation (Morgan & Watkinson 1989). When the process is conducted in enclosures controlling escaping volatile contaminants, volatilisation losses are minimized.…”

Section: Ecological Risk Managementmentioning

confidence: 99%

“…The petroleum products from the soil during landfarming are largely removed through volatilisation, biodegradation and adsorption (Morgan & Watkinson 1989;Devliegher & Verstraete 1996;Margesin et al 1999;Hejazi et al 2003). Lighter (more volatile) petroleum products like gasoline tend to be removed by volatilisation during landfarm aeration process and to a lesser extent, degraded by microbial respiration (EPA 1994).…”

Section: Introductionmentioning

confidence: 99%