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Related Concept Videos

Biodeterioration01:28

Biodeterioration

Biodeterioration refers to the unwanted alteration of materials caused by microorganisms—especially fungi—which damage both organic substrates (paper, wood, textiles) and inorganic ones (stone, plaster, glass). Unlike abiotic decay, biodeterioration results from biological activity that produces physical disruption and chemical degradation.Physical deterioration occurs as fungal hyphae penetrate pores, cracks, and surface irregularities. Hyphal turgor pressure, thigmotropic growth along...
Microbial Bioremediation of Pesticides01:28

Microbial Bioremediation of Pesticides

Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Bioremediation00:46

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
Microbial Bioremediation of Hydrocarbons01:26

Microbial Bioremediation of Hydrocarbons

Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
Microbial Wastewater Treatment01:30

Microbial Wastewater Treatment

Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...

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Related Experiment Video

Updated: Jul 9, 2026

Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials
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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials

Published on: May 16, 2022

DDE remediation and degradation.

John E Thomas1, Li-Tse Ou, Abid All-Agely

  • 1University of Florida, Soil and Water Science Deptartment, Gainesville, FL 32611, USA.

Reviews of Environmental Contamination and Toxicology
|December 12, 2007
PubMed
Summary

DDT and its persistent metabolite DDE contaminate soil and water. Various remediation strategies, including phytoremediation and microbial degradation, show promise but face challenges in complete removal and preventing contaminant spread.

Area of Science:

  • Environmental Science
  • Environmental Chemistry
  • Bioremediation

Background:

  • DDT (dichlorodiphenyltrichloroethane) and its metabolites DDD and DDE are persistent organic pollutants.
  • DDE, a major metabolite, exhibits significant environmental persistence and biological activity.
  • Historical widespread use of DDT has led to extensive environmental contamination.

Purpose of the Study:

  • To review and synthesize current remediation techniques for DDT, DDD, and DDE.
  • To evaluate the efficacy and limitations of various physical, chemical, and biological methods.
  • To identify challenges and future research directions in pollutant degradation.

Main Methods:

  • Phytoremediation using plants like Cucurbita pepo to translocate contaminants.

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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials
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Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer
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Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer

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  • Microbial degradation via aerobic and anaerobic pathways utilizing specific bacterial strains.
  • Abiotic remediation employing chemical catalysts, UV light, and other physical methods.

    • Main Results:

    • Phytoremediation can translocate DDE, with Cucurbita pepo showing hyperaccumulation potential.
    • Microbial degradation pathways are proposed but not fully verified; cometabolism is observed.
    • Anaerobic reductive dechlorination can convert DDE to DDMU by specific bacteria.
    • Abiotic methods like UV/TiO2 and visible light/methylene green show promise for degradation.

    Conclusions:

    • Remediation of DDT, DDD, and DDE is achievable through diverse methods.
    • Current methods face limitations in complete removal and risk of contaminant redistribution.
    • Further research is crucial to overcome challenges and develop effective, safe remediation strategies.