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Related Experiment Videos

Chloride imbalances in soil lysimeters.

M Rodstedth1, C Ståhlberg, P Sandén

  • 1Department of Thematic Research, Environmental Science Programme, Linköpings Universitet, 60174 Norrköping, Sweden.

Chemosphere
|May 10, 2003
PubMed
Summary

Soil can act as both a source and sink for chloride, challenging previous assumptions. Changes in organic chlorine storage significantly influence the chloride budget, impacting environmental assessments.

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Area of Science:

  • Environmental Science
  • Soil Science
  • Biogeochemistry

Background:

  • The traditional view assumes soil is neutral regarding chloride, neither a source nor a sink.
  • Understanding soil's role in chloride cycling is crucial for environmental monitoring and management.

Purpose of the Study:

  • To evaluate the assumption that soil neither acts as a source nor a sink for chloride.
  • To investigate the influence of organic chlorine on the soil chloride budget.

Main Methods:

  • Incubating soil cores in lysimeters within a controlled climate chamber.
  • Monitoring chloride and organic chlorine levels and leaching in soil samples.

Main Results:

  • Lysimeters demonstrated varied behavior, acting as both chloride sinks and sources.

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  • Significant leaching of organic chlorine was observed, partially explaining discrepancies.
  • Organic chlorine storage, four times that of chloride, greatly impacts the budget.
  • Soil heterogeneity prevented definitive measurement of storage changes.

    • Conclusions:

    • Net changes in soil organic chlorine storage likely cause observed chloride surpluses and deficits.
    • An inverse correlation exists between initial soil chloride content and budget imbalance.
    • Organic chlorine leaching may lead to underestimation of dry chloride deposition by approximately 25%.