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→How is it being used?
===How is it being used?===
===How is it being used?===
No projects that use ZVI were found in Ontario.
* A Maplewood,Minnesota field study developed an iron-enhanced (5% iron filings) ditch check sand filter for installation in [[Swales|swales]] to provide treatment of dissolved heavy metals and dissolved phosphorous in stormwater runoff from highways<ref>Farzana Ahmed, Poornima Natarajan, John S. Gulliver, Peter T. Weiss, John L. Nieber. 2014. Assessing and Improving Pollution Prevention by Swales. https://www.lrrb.org/pdf/201430.pdf</ref>.
* No projects that use ZVI were found in Ontario.
[[File:Screenshot 2025-08-13 113919.png|500px|thumb|[[Bioretention]] schematic, with circles highlighting ZVI addition and phosphorus removal <ref name = Lechner>Lechner L. Phosphorus Removal From Stormwater Using Zero-Valent Iron. 2016. Applied Science Masters Thesis.</ref>.]]
[[File:Screenshot 2025-08-13 113919.png|500px|thumb|[[Bioretention]] schematic, with circles highlighting ZVI addition and phosphorus removal <ref name = Lechner>Lechner L. Phosphorus Removal From Stormwater Using Zero-Valent Iron. 2016. Applied Science Masters Thesis.</ref>.]]