Abstract
Constructed wetlands are increasingly being seen as a viable solution to the treatment of highway runoff. This paper presents a preliminary assessment of the heavy metal removal performance of a natural wetland. The results are compared with the levels found in an adjacent stream which also receives runoff from the same major road. Both subsequently discharge effluent at proximal locations into the Brent Reservoir, a site of special scientific interest in NW London. The concentrations and temporal trends of Cd, Cu, Pb and Zn in the water, sediment and emergent macrophytes of the wetland and stream are discussed with respect to the treatment efficiency of the wetland. Although there is evidence of active metal uptake by the sediment and macrophytes, aqueous metal concentrations generally remain unchanged. The results support the proposal to construct a wetland planted with selected species of macrophyte to treat highway runoff on approximately half the area of the current site.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
