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Related Experiment Videos

Matrix-bound phosphine in Antarctic biosphere.

Renbin Zhu1, Liguang Sun, Deming Kong

  • 1Institute of Polar Environment, University of Science and Technology of China, Hefei city, Anhui Province 230026, PR China. zhurb@ustc.edu.cn

Chemosphere
|March 1, 2006
PubMed
Summary

Researchers detected matrix-bound phosphine (PH(3)) in Antarctic guanos and soils for the first time. Phosphine levels correlated with phosphorus content and varied significantly across different animal guanos.

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Area of Science:

  • Geochemistry
  • Environmental Science
  • Biogeochemistry

Background:

  • Phosphine (PH(3)) is a key gaseous phosphorus carrier in geochemical cycles.
  • Understanding phosphine's role in extreme environments like Antarctica is crucial for ecosystem balance.
  • Previous research has not extensively studied phosphine in Antarctic biospheres.

Purpose of the Study:

  • To investigate phosphine levels in the Antarctic biosphere for the first time.
  • To determine the presence and concentration of matrix-bound phosphine (MBP) in various Antarctic samples.
  • To analyze the relationship between phosphine concentrations and geochemical factors.

Main Methods:

  • Field sampling in the Antarctic biosphere.
  • Analysis of phosphine concentrations in sea animal guanos, ornithogenic sediments, and soils.

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  • Quantification of total phosphorus (TP), inorganic phosphorus (IP), and organic phosphorus (OP).
  • Correlation analysis with iron (Fe), manganese (Mn), and aluminum (Al).

    • Main Results:

    • Matrix-bound phosphine (MBP) was detected in sea animal guanos, ornithogenic sediments, and soils.
    • Phosphine concentrations varied significantly among different guanos, with skua and gull guanos showing the highest levels.
    • Phosphine levels positively correlated with TP, IP, and OP content.
    • A positive correlation was observed between phosphine and iron in guanos, while high Fe, Al, and Mn inhibited PH(3) formation in soils/sediments.

    Conclusions:

    • Phosphine is present in the Antarctic biosphere, particularly in guanos and ornithogenic soils.
    • Phosphorus content is a significant factor influencing MBP concentrations.
    • Geochemical elements like Fe, Al, and Mn play complex roles in phosphine formation and inhibition in Antarctic environments.