Uptake kinetics of five hydrophobic organic pollutants in the earthworm Eisenia fetida in six different soils

Šmídová, Klára; Hofman, Jakub

doi:10.1016/j.jhazmat.2013.12.063

Cited by 39 publications

(19 citation statements)

References 44 publications

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“…The results of the present study revealed that the percentage of weight variation was inhibited in BaP-treated soils regardless of soil type ( Table 2). This phenomenon may be correlated with the natural survival strategy of earthworms, avoiding toxins by reducing food intake, thereby reducing weight, and the passive absorption of the BaP (log K OW [octanolwater partition coefficient] ¼ 6.04) through the body wall constitutes an important additional route [27,28]. Similar body adjustments were observed in Lumbricus rubellus, which displayed significant growth inhibition after PAH exposure [29].…”

Section: Discussionmentioning

confidence: 78%

Effects of benzo[a]pyrene on growth, the antioxidant system, and DNA damage in earthworms (Eisenia fetida) in 2 different soil types under laboratory conditions

Duan

Song

et al. 2015

Enviro Toxic and Chemistry

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The aims of the present study were to compare the toxic effects of benzo[a]pyrene (BaP) and to screen for rapid and sensitive biomarkers that can be used to assess the environmental risks of BaP in earthworms in different natural soil types. The authors exposed Eisenia fetida to 2 types of soil (red soil and fluvo-aquic soil) spiked with different concentrations (0 mg kg(-1), 1 mg kg(-1), 10 mg kg(-1), 100 mg kg(-1), and 500 mg kg(-1)) of BaP for 7 d or 14 d. Benzo[a]pyrene-induced weight variation altered the activities of antioxidant enzymes (superoxide dismutase [SOD]; catalase [CAT]; and guaiacol peroxidase [POD]) and changed the content of malondialdehyde (MDA). In addition, using the comet assay, the authors determined the DNA damage in earthworms. The results revealed that the comet assay was suitable for evaluating the genotoxicity of BaP in the soil, even at the lowest examined concentration. The MDA content was the least sensitive indicator of BaP toxicity. A 3-way analysis of variance (ANOVA) was used to determine whether the soil type, exposure concentration, and duration affected the BaP toxicity. The antioxidant enzyme activities and the MDA content were shown to be significantly correlated with the exposure concentration. The percentage of weight variation (p < 0.001), CAT activity (p < 0.05), and SOD activity (p < 0.01) were significantly affected by the soil type, and the POD activity (p < 0.01), CAT activity (p < 0.001), and SOD activity (p < 0.001) were significantly affected by the exposure duration. Therefore, measuring DNA damage in earthworms is a simple and efficient means of assessing BaP genotoxicity in a terrestrial environment, and the effects of the soil type and exposure time on the other parameters that were investigated in E. fetida, which were used as responsive biomarkers, should be considered.

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Section: Discussionmentioning

confidence: 78%

Effects of benzo[a]pyrene on growth, the antioxidant system, and DNA damage in earthworms (Eisenia fetida) in 2 different soil types under laboratory conditions

Duan

Song

et al. 2015

Enviro Toxic and Chemistry

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“…The reason for this might be that the available fraction of B[a]P in the multiple-time addition treatment was significantly lower than that in the one-time addition treatment. It has been accepted that the bioavailability of organic pollutants is one of the main factors influencing the extent of their toxicity towards soil biota 33,34 , while the decreased bioavailability of B[a]P in soil reduced the toxic effects of B[a]P to earthworms. These enzyme activities are significantly correlated to the bioavailability of B[a]P (the available fraction in the soil and the fraction taken up by earthworms) in the two addition manners.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the bioavailability of benzo[a]pyrene (B[a]P) in a B[a]P-contaminated soil using the different addition approaches

Wei

et al. 2019

Sci Rep

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Determination of the bioavailability of the hydrophobic organic contaminant benzo[a]pyrene (B[a]P) is extremely important for assessing its environmental risk. The effect of addition manner of B[a]P on the bioavailability and toxicity of B[a]P in soil remains unclear. In this study, soil samples, spiked with B[a]P by one-time or multiple-time additions, were tested to investigate the available fraction of B[a]P in soils, the uptake of B[a]P by red wiggler worms ( Eisenia fetida ), as well as superoxide dismutase (SOD) and peroxidase (POD) activities in earthworm coelomocytes at different periods. Results showed that the available fraction of B[a]P in soils and the amount of B[a]P assimilated by earthworms declined sharply from 1 d to 28 d during the incubation period and then decreased slowly from 28 to 56 d in both the one-time and the multiple-time addition tests. The available fraction of B[a]P in soils and its uptake by earthworms were significantly lower in multiple-time addition samples than those in one-time addition samples, a finding which was consistent with the SOD and POD activities in earthworms during the whole 56-d incubation period. These variations in the characteristics of the two addition treatments may be due to the differences in the way the B[a]P aged in the soil. These results indicated that the addition method was an important factor influencing the bioavailability of organic contaminants in soils.

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“…The high DOC concentration is an energy source for microbial metabolism [33]. Among them, smaller organic carbon compounds are generally degraded by microbes much easier, because it was correlated with the acid functional group density and volatile matter contents [31]. Negatively correlated with the DOC concentrations, the SUVA254 values in the control group was highest, which was 2 and 1.5 times higher than that in LA and HA group in Phase 1.…”

Section: Organic Carbon Characteristics In Wastewatermentioning

confidence: 98%

“…The lowest DOC concentration was still obtained in control group, which was 2.9% and 25.6% lower compared to LA and HA group. T. tubifex can uptake and exchange the flow of pollutants through two main routes: 1) passive uptake the compounds dissolved in water through the epidermis and transformed these compounds into sediment (indirectly affect), 2) then ingested pollutants passes through the digestive track after ingestion of soil particles, water, and food (directly affect) [31]. T. tubifex is an upward-conveyor, thus feeding on sediment and ejecting faecal pellets at the water-sediment interface.…”

Section: Organic Carbon Characteristics In Wastewatermentioning

confidence: 99%

Improvement of bioavailable carbon source and microbial structure toward enhanced nitrate removal by Tubifex tubifex

Kang

Zhang

et al. 2018

Chemical Engineering Journal

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The research provides new insights into how T. tubifex affects microbe-available organic carbon transformation, microbial community, and related inorganic nitrogen transformation. With different T. tubifex densities under enriched NO3-N concentration with different C/N ratio, the groups with low and high T. tubifex abundance had 17.1% and 27.2% higher TOC concentrations compared to control group under C/N ratio of 3.0 and 2.0, respectively. According to the OC characteristics analyzed by GC-MS and EEM, the group with T. tubifex contained higher dissolved organic carbon (DOC) content and short-chain compounds. As the NO3-N concentration increased and C/N ratio decreased, the proportions of carboxylic acid derivatives (methyl acetate), sulfurcontaining compounds, humic-like products and the emission of CO2 were enhanced with T. tubifex, which could be utilized by denitrifiers directly. The OC degradation was highly correlated with the effect of T. tubifex on microbial community and nutrient removal. The T. tubifex can increase OC transformed into sediment and change the microbial community similarity to that in their digestive system. According to the principal component analysis (PCA), the improved proportions of OC that available for microbes and altered microbial community with T. tubifex could enhance denitrification, which experienced a 21% higher denitrifiers and threefold increased NO3-N removal efficiency than that in control group.

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Uptake kinetics of five hydrophobic organic pollutants in the earthworm Eisenia fetida in six different soils

Cited by 39 publications

References 44 publications

Effects of benzo[a]pyrene on growth, the antioxidant system, and DNA damage in earthworms (Eisenia fetida) in 2 different soil types under laboratory conditions

Effects of benzo[a]pyrene on growth, the antioxidant system, and DNA damage in earthworms (Eisenia fetida) in 2 different soil types under laboratory conditions

Comparison of the bioavailability of benzo[a]pyrene (B[a]P) in a B[a]P-contaminated soil using the different addition approaches

Improvement of bioavailable carbon source and microbial structure toward enhanced nitrate removal by Tubifex tubifex

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