Variation among plant species in pollutant removal from stormwater in biofiltration systems
Autor: | Jennifer Read, Ana Deletic, Tim D. Fletcher, Tricia Wevill |
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Rok vydání: | 2008 |
Předmět: |
Pollutant
Environmental Engineering Nitrogen Rain Ecological Modeling Stormwater Environmental engineering food and beverages Phosphorus Pollution Water Purification Phosphorus metabolism Magnoliopsida Metals Biofilter Soil water Environmental science Water Pollutants Surface runoff Waste Management and Disposal Effluent Filtration Water Science and Technology Civil and Structural Engineering Total suspended solids |
Zdroj: | Water Research. 42:893-902 |
ISSN: | 0043-1354 |
DOI: | 10.1016/j.watres.2007.08.036 |
Popis: | Biofiltration systems use vegetation to improve efficiency of pollutant removal from stormwater, but little is known of how plants vary in their capacity to improve biofilter effectiveness. We used a pot trial of 20 Australian species to investigate how species vary in the removal of pollutants from semisynthetic storm water passing through a soil filter medium. Effluent levels of total suspended solids (TSS), Al, Cr, Cu, Pb and Zn were similarly low for vegetated and non-vegetated soils, with reduction to1-12% of levels in the stormwater input. N and P effluent concentrations were generally lower from vegetated than non-vegetated soils, but total N increased on average in effluent of both vegetated and non-vegetated soils relative to stormwater input. Effluent concentrations varied 2-4-fold among species for TSS, total N and P, total dissolved N (TDN), organic nitrogen and Cu, to more than 20-fold for NOx, NH4+, Mn, Pb and Fe. Species also varied markedly in pollutant removal per root mass (a means of standardising for plant size), with 18-50-fold variation among species in effluent concentrations of total P and N, TDN and organic N, to150-fold variation in NOx and NH4+. Hence, choice of plant species may have marked effects on biofilter effectiveness. |
Databáze: | OpenAIRE |
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