title: The use of reactive material for limiting P-leaching from green roof substrate.
abstract: The aim of the study is to assess the influence of drainage layer made of reactive material Polonite(®) on the water retention and P-PO(4) concentration in runoff. A column experiment was performed for extensive substrate underlined by 2 cm of Polonite(®) layer (SP) and the same substrate without supporting layer as a reference (S). The leakage phosphorus concentration ranged from 0.001 to 0.082 mg P-PO(4)·L(-1), with average value 0.025 P-PO(4)·L(-1) of S experiment and 0.000-0.004 P-PO(4)·L(-1) and 0.001 P-PO(4)·L(-1) of SP experiment, respectively. The 2 cm layer of Polonite(®) was efficient in reducing P outflow from green roof substrate by 96%. The average effluent volumes from S and SP experiments amounted 61.1 mL (5.8-543.3 mL) and 46.4 mL (3.3-473.3 mL) with the average irrigation rate of 175.5 mL (6.3-758.0 mL). The substrate retention ability of S and SP experiments was 65% and 74%, respectively. Provided with reactive materials, green roof layers implemented in urban areas for rain water retention and delaying runoff also work for protection of water quality.
authors.affiliation: Department of Environmental Improvement, Warsaw University of Life Sciences-SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland E-mail: agnieszka_bus@sggw.pl.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Bus
authors.affiliation: Department of Environmental Improvement, Warsaw University of Life Sciences-SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland E-mail: agnieszka_bus@sggw.pl.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Karczmarczyk
authors.affiliation: Department of Environmental Improvement, Warsaw University of Life Sciences-SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland E-mail: agnieszka_bus@sggw.pl.
authors.forename: Anna
authors.initials: A
authors.lastname: Baryła
mesh_terms: D010087:Oxides / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D011891:Rain; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D060753:Water Quality
chemical_list: D010087:Oxides; D010710:Phosphates; C507562:Polonite; D014874:Water Pollutants, Chemical; D010758:Phosphorus