Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Methanogenic inhibition by arsenic compounds.

Reyes Sierra-Alvarez1, Irail Cortinas, Umur Yenal

  • 1Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA. Rsierra@email.arizona.edu

Applied and Environmental Microbiology
|September 4, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Assessing strategies to measure hidden per- and polyfluoroalkyl substances (PFAS) in groundwater and to evaluate adsorption remediation efficiencies.

Chemosphere·2024
Same author

Comparative Methods for Quantification of Sulfate-Reducing Bacteria in Environmental and Engineered Sludge Samples.

Biology·2023
Same author

Biodegradation of the emerging contaminant 3-nitro-1,2,4-triazol-5-one and its product 3-amino-1,2,4-triazol-5-one in perlite/soil columns.

Chemosphere·2023
Same author

Treatment of the insensitive munitions compound, 3-nitro-1,2,4-triazol-5-one (NTO), in flow-through columns packed with zero-valent iron.

Environmental science and pollution research international·2023
Same author

Antimony toxicity upon microorganisms from aerobic and anaerobic environments.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2023
Same author

The key role of biogenic arsenic sulfides in the removal of soluble arsenic and propagation of arsenic mineralizing communities.

Environmental research·2022

Trivalent arsenicals like methylarsonous acid and arsenite strongly inhibit acetoclastic methanogenesis. Pentavalent arsenic compounds were generally non-toxic, indicating a significant difference in toxicity based on arsenic

Area of Science:

  • Environmental Science
  • Toxicology
  • Microbiology

Background:

  • Arsenicals are widely used in various industries, leading to environmental contamination.
  • Understanding the impact of different arsenic species on microbial processes is crucial for risk assessment.
  • Methanogenesis, particularly acetoclastic methanogenesis, plays a vital role in anaerobic environments.

Purpose of the Study:

  • To investigate the acute inhibitory effects of various inorganic and organic arsenicals on acetoclastic methanogenesis.
  • To compare the toxicity of trivalent versus pentavalent arsenic species.
  • To determine the inhibitory concentrations of specific arsenicals.

Main Methods:

  • Assaying the inhibition of acetoclastic methanogenesis using different arsenical compounds.

Related Experiment Videos

  • Measuring the 50% inhibitory concentrations (IC50) for highly toxic species.
  • Evaluating the toxicity of both inorganic (arsenite, arsenate) and organic (roxarsone, methylarsonous acid) arsenic forms.

    • Main Results:

    • Trivalent arsenicals, specifically methylarsonous acid (9.1 microM) and arsenite (15.0 microM), demonstrated high inhibitory effects on methanogenesis.
    • Pentavalent arsenic species exhibited generally low or no toxicity.
    • Roxarsone, an organic nitrophenylarsonate derivative, showed moderate toxicity.

    Conclusions:

    • Arsenic speciation significantly influences its toxicity to acetoclastic methanogens.
    • Trivalent arsenic compounds pose a greater risk to methanogenic activity than pentavalent forms.
    • These findings are important for assessing the environmental impact of arsenic contamination on anaerobic digestion processes.