Sterilization affects soil organic matter chemistry and bioaccumulation of spiked p,p′-DDE and anthracene by earthworms

Kelsey, Jason W.; Slizovskiy, Ilya B.; Peters, Richard D.; Melnick, Adam M.

doi:10.1016/j.envpol.2010.02.011

Cited by 28 publications

(11 citation statements)

References 40 publications

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“…This situation is not applied in bioremediation field. Few studies have described the effects of soil sterilization on the bioavailability of sorbed contaminants and changes in SOM (Northcott and Jones, 2001;Nam et al, 2003;Kelsey et al, 2010). observed that sterilization increased the degradation of pyrene because of the removal of competition from indigenous microbes.…”

Section: Soil and Liquid Culturesmentioning

confidence: 99%

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Kadri

Rouissi

Brar

et al. 2017

Journal of Environmental Sciences

366

118

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Polycyclic aromatic hydrocarbons (PAHs) are a large group of chemicals. They represent an important concern due to their widespread distribution in the environment, their resistance to biodegradation, their potential to bioaccumulate and their harmful effects. Several pilot treatments have been implemented to prevent economic consequences and deterioration of soil and water quality. As a promising option, fungal enzymes are regarded as a powerful choice for degradation of PAHs. Phanerochaete chrysosporium, Pleurotus ostreatus and Bjerkandera adusta are most commonly used for the degradation of such compounds due to their production of ligninolytic enzymes such as lignin peroxidase, manganese peroxidase and laccase. The rate of biodegradation depends on many culture conditions, such as temperature, oxygen, accessibility of nutrients and agitated or shallow culture. Moreover, the addition of biosurfactants can strongly modify the enzyme activity. The removal of PAHs is dependent on the ionization potential. The study of the kinetics is not completely comprehended, and it becomes more challenging when fungi are applied for bioremediation. Degradation studies in soil are much more complicated than liquid cultures because of the heterogeneity of soil, thus, many factors should be considered when studying soil bioremediation, such as desorption and bioavailability of PAHs. Different degradation pathways can be suggested. The peroxidases are heme-containing enzymes having common catalytic cycles. One molecule of hydrogen peroxide oxidizes the resting enzyme withdrawing two electrons. Subsequently, the peroxidase is reduced back in two steps of one electron oxidation. Laccases are copper-containing oxidases. They reduce molecular oxygen to water and oxidize phenolic compounds.

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Section: Soil and Liquid Culturesmentioning

confidence: 99%

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Kadri

Rouissi

Brar

et al. 2017

Journal of Environmental Sciences

366

118

View full text Add to dashboard Cite

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“…In order to particularly address the questions, researchers used different methods to inhibit biological activity. Physical techniques such as autoclave and gamma irradiation were largely employed (Berns et al, 2008;Kelsey et al, 2010;McNamara et al, 2003). Nevertheless, both techniques were singled out as matrix destroyers, increasing surface area of clays as well as significantly altering the organic matter structure (Berns et al, 2008;Kelsey et al, 2010;McNamara et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Have decades of abiotic studies in sediments been misinterpreted?

Layglon

Misson

Mounier

et al. 2020

Science of The Total Environment

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Sterilization techniques are largely employed to distinguish biotic and abiotic processes in biogeochemical studies as they inhibit microbial activity. Since one century, chemical sterilizers, supposed to preserve original environmental samples, have taken precedence over physical sterilization techniques considered too destructive. Sodium azide (NaN 3) is nowadays the most commonly used inorganic chemical sterilizer. It is sufficiently purified to study trace metals, as well. Nevertheless, its (in)activity in physico-chemical processes was never ascertained. Through the investigation of sediment resuspension in seawater, the present work unequivocally demonstrated that NaN 3 can impact carbon and balance and pH. Unlike decades of blind practice, NaN 3 should be used with great care to track abiotic processes from organic matter rich and reductive matrices.

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“…For extraction of phenanthrene from the earthworm, the recommendation set by the Organization for Economic Cooperation and Development (OECD, 1984) was used with some modification that was previously defined by Kelsey et al [ 33 ]. To assess the ability of the phenanthrene removal from the soil, the Eisenia fetida were used through bioaccumulation after separation of the other earthworms from the soil.…”

Section: Methodsmentioning

confidence: 99%

Influence of bioaugmentation on biodegradation of phenanthrene-contaminated soil by earthworm in lab scale

Asgharnia

Jafari

Kalantary

et al. 2014

J Environ Health Sci Engineer

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BackgroundUse of earthworm to eliminate the phenanthrene from the soil (bioaccumulation) is developed as an economical method. Bioaugmentation of microorganism was used for promotion of bioaccumulation by earthworm. The aim of this study was to determine the bioaccumulation or biodegradation of phenanthrene by Eisenia fetida and bacterial consortium in polluted soil.MethodsThe amount of 0.4 kg of the polluted soil in the ratio of 10 and 30 mg phenanthrene per kg of dry soil was transferred into each pot. Afterwards, bacteria and earthworms were added to each pot in separate and combination. The samples were kept under field conditions, and the retention concentrations of phenanthrene were analyzed after 8 weeks.ResultsResults showed that the Eisenia fetida was able to significantly remove phenanthrene from the polluted soil samples. Bioaccumulation and bioaugmentation alone have the removal efficiency of 60.24% and 50.3%, respectively. In the combined mode, phenanthrene removal efficiency was 63.81%.ConclusionsThe current study indicated that the use of earthworms, could improve both phenanthrene bioavailability and microbial activity, which led to enhancing removal of carbon-based pollutants.

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Sterilization affects soil organic matter chemistry and bioaccumulation of spiked p,p′-DDE and anthracene by earthworms

Cited by 28 publications

References 40 publications

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review

Have decades of abiotic studies in sediments been misinterpreted?

Influence of bioaugmentation on biodegradation of phenanthrene-contaminated soil by earthworm in lab scale

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