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Related Concept Videos

Microbial Bioremediation of Hydrocarbons01:26

Microbial Bioremediation of Hydrocarbons

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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...
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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.
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The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Microbial Bioremediation of Pesticides01:28

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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...
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Microbial Bioremediation of Plastics01:28

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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
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Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation
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Marine Oil Biodegradation.

Terry C Hazen1,2,3,4, Roger C Prince1,2,3,4, Nagissa Mahmoudi1,2,3,4

  • 1Departments of Civil & Environmental Engineering, Microbiology, Earth & Planetary Sciences, Center for Environmental Biotechnology, Bredesen Center, Genome Science & Technology, Institute for Secure and Sustainable Environment, University of Tennessee , Knoxville, Tennessee 37996, United States and.

Environmental Science & Technology
|December 25, 2015
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Marine microbes biodegrade crude oil in seawater, sediments, and shorelines. While dispersed oil degrades rapidly in aerobic waters, shoreline and sediment-bound oil persist longer, requiring ecosystem-level study.

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Area of Science:

  • Environmental Science
  • Microbiology
  • Marine Biology

Background:

  • Crude oil is a natural component of marine ecosystems.
  • Microbes capable of utilizing petroleum hydrocarbons are ubiquitous in marine environments.
  • Marine microbes utilize carbon and energy from crude oil, with growth influenced by nutrient availability.

Purpose of the Study:

  • To investigate the biodegradation of crude oil in various marine environments.
  • To understand the factors influencing the rate and extent of petroleum biodegradation.
  • To highlight the need for multi-level data for comprehending marine oil biodegradation.

Main Methods:

  • Observational studies across diverse marine environments (seawater, sediments, shorelines).
  • Analysis of microbial responses to oil spills, including population blooms.
  • Assessment of nutrient (nitrogen, phosphorus, iron) availability and its impact on biodegradation.
  • Evaluation of hydrocarbon degradation rates under different conditions (aerobic vs. anaerobic, dispersed vs. concentrated).

Main Results:

  • Microbial blooms are a reproducible response to oil spills.
  • Adequate nutrient levels in dispersed oil facilitate microbial growth in aerobic marine waters.
  • Hydrocarbon degradation half-life is days to months for dispersed oil in aerobic waters.
  • Oil on shorelines and in anaerobic sediments exhibits longer residence times and slower biodegradation.

Conclusions:

  • Petroleum biodegradation in marine environments is a complex process.
  • Environmental factors like oil concentration, nutrient availability, and oxygen levels significantly affect biodegradation rates.
  • A comprehensive understanding necessitates data from ecosystem to molecular levels.