Contaminant removal efficiency of floating treatment wetlands

Journal Article (Journal Article)

Floating treatment wetlands are new ecological infrastructures for stormwater treatment. Despite a recent proliferation in their usage, their contaminant removal efficiency e continues to draw research attention. Here, the e from idealized FTWs is numerically computed across a wide range of flow and geometric conditions while accommodating joint contributions of advection, turbulent dispersion, and vegetation removal. The emerging mathematical structure describing e bears resemblance to a simplified plug flow model and supports an empirical shallow-basin model from long-term field measurements. The present model indicates that e remains significantly influenced by a Dämkohler number that quantifies the effects of both vegetation and flow properties. The impacts on e of the underflow region and contaminant blockage on the removal mechanisms are also investigated.

Full Text

Duke Authors

Cited Authors

  • Li, S; Katul, G

Published Date

  • October 1, 2020

Published In

Volume / Issue

  • 15 / 10

Electronic International Standard Serial Number (EISSN)

  • 1748-9326

International Standard Serial Number (ISSN)

  • 1748-9318

Digital Object Identifier (DOI)

  • 10.1088/1748-9326/abaa0a

Citation Source

  • Scopus