Particle size distribution predicts particulate phosphorus removal.

Journal Article (Journal Article)

Particulate phosphorus (PP) is often the largest component of the total phosphorus (P) load in stormwater. Fine-resolution measurement of particle sizes allows us to investigate the mechanisms behind the removal of PP in stormwater wetlands, since the diameter of particles influences the settling velocity and the amount of sorbed P on a particle. In this paper, we present a novel method to estimate PP, where we measure and count individual particles in stormwater and use the total surface area as a proxy for PP. Our results show a strong relationship between total particle surface area and PP, which we use to put forth a simple mechanistic model of PP removal via gravitational settling of individual mineral particles, based on a continuous particle size distribution. This information can help improve the design of stormwater Best management practices to reduce PP loading in both urban and agricultural watersheds.

Full Text

Duke Authors

Cited Authors

  • River, M; Richardson, CJ

Published Date

  • January 2018

Published In

Volume / Issue

  • 47 / Suppl 1

Start / End Page

  • 124 - 133

PubMed ID

  • 29164536

Pubmed Central ID

  • PMC5722747

Electronic International Standard Serial Number (EISSN)

  • 1654-7209

International Standard Serial Number (ISSN)

  • 0044-7447

Digital Object Identifier (DOI)

  • 10.1007/s13280-017-0981-z


  • eng