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Related Experiment Video

Updated: Feb 18, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
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Particle size distribution predicts particulate phosphorus removal.

Mark River1, Curtis J Richardson2

  • 1Duke University Wetland Center, Nicholas School of the Environment, Durham, NC, 27708, USA. mark.river@duke.edu.

Ambio
|November 23, 2017
PubMed
Summary

We developed a new method to measure particulate phosphorus (PP) in stormwater using particle surface area. This approach helps improve stormwater wetland design for better phosphorus removal.

Keywords:
Best management practices (BMP’s)EutrophicationNano phosphorusParticle size distributionParticulate phosphorusStormwater wetlands

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Area of Science:

  • Environmental Science
  • Water Quality Management
  • Environmental Chemistry

Background:

  • Particulate phosphorus (PP) constitutes a significant portion of total phosphorus loads in stormwater runoff.
  • Understanding particle size distribution is crucial for predicting PP removal in stormwater treatment systems.
  • Existing methods for PP quantification can be resource-intensive.

Purpose of the Study:

  • To introduce a novel, surface-area-based method for estimating PP in stormwater.
  • To investigate the relationship between particle surface area and PP concentration.
  • To develop a mechanistic model for PP removal in stormwater wetlands.

Main Methods:

  • Measuring and counting individual particles in stormwater samples.
  • Utilizing total particle surface area as a proxy for PP quantification.
  • Developing a continuous particle size distribution model for mineral particles.

Main Results:

  • A strong correlation was observed between total particle surface area and PP.
  • The proposed method provides a viable alternative for PP estimation.
  • A mechanistic model for PP removal via gravitational settling was established.

Conclusions:

  • Total particle surface area is an effective proxy for estimating PP in stormwater.
  • The developed model aids in understanding PP removal mechanisms in wetlands.
  • Findings can inform the design of improved stormwater best management practices (BMPs) for phosphorus reduction.