VIEW LARGER COVER
There are several best management practices that are good at removing particulate-bound pollutants by settling, filtering, and, in the case of wetlands, settling, uptake, and incorporation of pollutants into biological matter (e.g., natural organic matter). However, a longstanding goal of stormwater treatment is the removal of the stormwater pollutant fraction that cannot be readily settled or filtered.
While there are several media that may be employed to remove dissolved metals from stormwater, the media chosen for the TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 265: Field Test of BMPs Using Granulated Ferric Oxide Media to Remove Dissolved Metals in Roadway Stormwater Runoff is ferric oxide. Field scale testing of ferric oxide was recommended as an outcome of NCHRP Report 767: Measuring and Removing Dissolved Metals fromStorm Water in Highly Urbanized Areas (2014), a laboratory study that considered several metals and media with testing focused on the capacity of ferric oxide to remove copper and zinc from synthetic and natural highway stormwater runoff.
Highlights of the project are summarized in a PowerPoint presentation.
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