EFFICIENCY OF THE EARTHWORM Eisenia fetida UNDER THE EFFECT OF ORGANIC MATTER FOR BIOREMEDIATION OF SOILS CONTAMINATED WITH CADMIUM AND CHROMIUM

Mostafaii, Gholamreza; Aseman, E; Asgharnia, Hosseinali; Akbari, Hossein; Iranshahi, Leila; Sayyaf, Hossein

doi:10.1590/0104-6632.20160334s20150230

Cited by 9 publications

(3 citation statements)

References 22 publications

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“…The reason for this may be that the pH of the earthworm gut environment is usually in the neutral to weakly alkaline range. The earthworms had higher chromium accumulation in acidic soil, which may have caused greater stress to the earthworms [ 64 ]. Hait and Tare’s research also showed that environmental factors, including pH, temperature, humidity, oxygen content, light, and organic matter in heavy-metal-contaminated soil, had an impact on the growth and survival of earthworms [ 65 ].…”

Section: Discussionmentioning

confidence: 99%

Synergistic Effects of Earthworms and Plants on Chromium Removal from Acidic and Alkaline Soils: Biological Responses and Implications

Liu

Yan

Wang

et al. 2023

Biology

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Soil heavy metal pollution has become one of the major environmental issues of global concern and solving this problem is a major scientific and technological need for today’s socio-economic development. Environmentally friendly bioremediation methods are currently the most commonly used for soil heavy metal pollution remediation. Via controlled experiments, the removal characteristics of chromium from contaminated soil were studied using earthworms (Eisenia fetida and Pheretima guillelmi) and plants (ryegrass and maize) at different chromium concentrations (15 mg/kg and 50 mg/kg) in acidic and alkaline soils. The effects of chromium contamination on biomass, chromium bioaccumulation, and earthworm gut microbial communities were also analyzed. The results showed that E. fetida had a relatively stronger ability to remove chromium from acidic and alkaline soil than P. guillelmi, and ryegrass had a significantly better ability to remove chromium from acidic and alkaline soil than maize. The combined use of E. fetida and ryegrass showed the best effect of removing chromium from contaminated soils, wih the highest removal rate (63.23%) in acidic soil at low Cr concentrations. After soil ingestion by earthworms, the content of stable chromium (residual and oxidizable forms) in the soil decreased significantly, while the content of active chromium (acid-extractable and reducible forms) increased significantly, thus promoting the enrichment of chromium in plants. The diversity in gut bacterial communities in earthworms decreased significantly following the ingestion of chromium-polluted soil, and their composition differences were significantly correlated with soil acidity and alkalinity. Bacillales, Chryseobacterium, and Citrobacter may have strong abilities to resist chromium and enhance chromium activity in acidic and alkaline soils. There was also a significant correlation between changes in enzyme activity in earthworms and their gut bacterial communities. The bacterial communities, including Pseudomonas and Verminephrobacter, were closely related to the bioavailability of chromium in soil and the degree of chromium stress in earthworms. This study provides insights into the differences in bioremediation for chromium-contaminated soils with different properties and its biological responses.

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Section: Discussionmentioning

confidence: 99%

Synergistic Effects of Earthworms and Plants on Chromium Removal from Acidic and Alkaline Soils: Biological Responses and Implications

Liu

Yan

Wang

et al. 2023

Biology

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“…[57,58] . Furthermore, it has been demonstrated in wet lab studies that Eisenia fetida's accumulation of lead II sulfate causes the protein Metallothionein to be expressed [59] . These findings are consistent with our ongoing in silico study, which has also demonstrated how the accumulation of the heavy metal, Lead II sulphate in Eisenia fetida and An.…”

Section: In Silico Docking Of Metal -Protein Dockingmentioning

confidence: 99%

Heavy metal (PB) bioaccumulation study in Eisenia fetida and in the larvae of Anopheles gambiae complex using in silico drug docking protocols

Suganya,

Devi

2023

Int. J. Mosq. Res.

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Heavy metal bioaccumulation is the process by which the application of Eisenia fetida earthworm species in bioremediation of contaminated soil results in a decrease in the concentration of heavy metals. However, it negatively impacts earthworms and hence detrimental to agriculture. On the other hand, in adult mosquitoes, exposure to metal pollution during the larval stage significantly impacted their subsequent insecticide tolerance. The current in silico study, we carry out a comparative study on the effect of Heavy metal (PbSO4) bioaccumulation in Eisenia fetida and in the larvae of Anopheles gambiae complex. Metallothionein protein is selected as a common biomarker for the expression of metal accumulation in both species. In order to observe the accumulation of Lead II sulphate in the Metallothionein protein of Eisenia fetida and in the mosquito larvae, this study's methodology entails molecular drug docking and Hbond interaction studies using sophisticated automated drug docking servers. The findings unequivocally demonstrate that amino acid residues found in Eisenia fetida and in the larvae of the An. gambiae complex bind with different heavy metals, most notably Lead II sulphate. Our findings also line up with the previously validated wet lab findings. Finally, it was determined that Lead II sulphate directly binds to Metallothionein amino acid positions of both species. Based on the expression of Metallothionein protein, these results have demonstrated that Eisenia fetida and the larvae of the An. gambiae complex are capable of accumulating Lead II sulphate in their body. The accumulation of metals in a specific species of earthworm and mosquito larvae, which has detrimental effects on the species' biological systems at high concentrations, is clearly described throughout this entire In silico study.

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“…However, data on OM impact on bioremediation are contradictory. In Mostafaii et al (2016) study was found that organic matter has no effect on bioremediation. Some studies have shown that an increase of OM in soil contaminated with heavy metals can reduce the damaging effects of the metals (Haghparast et al, 2013).…”

Section: Introductionmentioning

confidence: 98%

Bioremediation Efficiency of Heavy Metal Contaminated Soil Using Earthworm Eisenia Fetida

Kniuipytė

Praspaliauskas

Žaltauskaitė

et al. 2020

International Conference “Environmental Engineering”

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The amount of sewage sludge (SS) used in agriculture and forest plantations is constantly growing in EU. It’s known that even after various treatment methods some of contaminants still remain. The main risks of using SS in agriculture or forestry are related with hevy metals and organic pollutants content in SS. Heavy metals tend to acumu-late in the environment and living organisms and may cause different adverse effects. Bioremediation using earthworms can be used to eliminate or mitigate the threat of heavy metals. Bioremediation is cheaper, requiries less energy and is more environmentally friendly than conventional physical or chemical remediation methods. But it’s really important to evaluate bioremediation efficiency for SS, because there is evidence that nutrients in SS might improve efficiency of bioremediation. In this study earthworms Eisenia fetida were exposed for 9 weeks to SS amended soil. Earthworm mortality, growth and heavy metals (Al, Fe) accumulation were evaluated. The results showed that SS had a highly significant effect on earthworm mortality (F=4.98; p;lt0.05) and growth (F=3.88–67.02; p;lt0.05). Both metals concentrations in soil were signifficant (p;lt0.05) lower after vermi-remediation than after SS soil amendments. SS concentration had a significant effect to Al concentration accumulated in earthworm tissue (F=33.71; p;lt0.05). This study demonstrated that bioremediation efficiency using E. fetida depends on concentrations of SS, survival and growth of earthworms.

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EFFICIENCY OF THE EARTHWORM Eisenia fetida UNDER THE EFFECT OF ORGANIC MATTER FOR BIOREMEDIATION OF SOILS CONTAMINATED WITH CADMIUM AND CHROMIUM

Cited by 9 publications

References 22 publications

Synergistic Effects of Earthworms and Plants on Chromium Removal from Acidic and Alkaline Soils: Biological Responses and Implications

Synergistic Effects of Earthworms and Plants on Chromium Removal from Acidic and Alkaline Soils: Biological Responses and Implications

Heavy metal (PB) bioaccumulation study in Eisenia fetida and in the larvae of Anopheles gambiae complex using in silico drug docking protocols

Bioremediation Efficiency of Heavy Metal Contaminated Soil Using Earthworm Eisenia Fetida

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