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Related Concept Videos

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...
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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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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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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

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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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A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments
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Petroleum asphaltenes: generated problematic and possible biodegradation mechanisms.

G Pineda-Flores1, A M Mesta-Howard

  • 1Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas-IPN, México, DF. pifloga@hotmail.com

Revista Latinoamericana De Microbiologia
|October 26, 2006
PubMed
Summary

Petroleum asphaltenes, complex hydrocarbons, cause significant industrial and environmental issues. This review explores their structure, problems, and potential biodegradation pathways, offering solutions for their removal.

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Area of Science:

  • Petroleum geochemistry
  • Environmental microbiology
  • Bioremediation

Background:

  • Petroleum asphaltenes are complex hydrocarbons containing nitrogen, sulfur, and oxygen.
  • Asphaltenes cause operational problems in oil extraction and transport, economic losses, and environmental pollution.
  • Natural biodegradation of asphaltenes is a slow process occurring in limited proportions.

Purpose of the Study:

  • To elucidate the chemical structure of petroleum asphaltenes.
  • To detail the problems associated with asphaltenes.
  • To propose biodegradation mechanisms for asphaltenes based on known hydrocarbon degradation pathways.

Main Methods:

  • Review of chemical structures and properties of asphaltenes.
  • Analysis of asphaltene-related industrial and environmental issues.
  • Extrapolation of biodegradation mechanisms from complex hydrocarbons to asphaltenes.
  • Identification of microbial processes involved in hydrocarbon degradation.

Main Results:

  • Asphaltene biodegradation requires initial micellar structure elimination (non-polar solvents) and fragmentation (photooxidation).
  • Degraded asphaltene structures (heteropolyaromatic, aromatic, linear, branched hydrocarbons) are subsequently degraded via biochemical reactions (omega, beta, aromatic oxidations).
  • Diverse microorganisms facilitate these biodegradation processes, with degradation times varying from one week to 990 days.

Conclusions:

  • Biodegradation offers a viable strategy for eliminating problematic petroleum asphaltenes.
  • Understanding the proposed degradation pathway can optimize bioremediation efforts.
  • The efficiency of biodegradation depends on asphaltene structure complexity and microbial consortia involved.