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Water 2014, 6(9), 2575-2589; doi:10.3390/w6092575

Effect of P-Reactive Drainage Aggregates on Green Roof Runoff Quality

Faculty of Civil and Environmental Engineering, Warsaw University of Life Sciences—SGGW, Nowoursynowska 166, Warsaw 02-787, Poland
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Received: 17 May 2014 / Revised: 8 August 2014 / Accepted: 14 August 2014 / Published: 27 August 2014
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Abstract

The main hypothesis of the presented study is that the negative effect of phosphorus leaching from a green roof substrate can be reduced by including P-reactive material in a drainage layer. In this work, different aggregates (Pollytag®, lightweight expanded clay aggregates, chalcedony, serpentynite and crushed autoclaved aerated concrete) to be used as the green roof drainage layer are described. Physical parameters, e.g., granulometric composition, water absorption, bulk density and porosity are assessed. A phosphorus sorption isotherm and a kinetic test were performed. Physical and chemical characteristics of the materials were used as a base for choosing the best media for the drainage layer. The P-removal efficiency of crushed autoclaved aerated concrete was confirmed in a column experiment. Adding the implementation of the P-reactive material in a drainage layer during construction can reduce the negative effect of substrate on green roof runoff quality. View Full-Text
Keywords: phosphorus; green roof; substrate; aggregates; Pollytag®; LECA; chalcedony; serpentinite; AAC phosphorus; green roof; substrate; aggregates; Pollytag®; LECA; chalcedony; serpentinite; AAC
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Karczmarczyk, A.; Baryła, A.; Bus, A. Effect of P-Reactive Drainage Aggregates on Green Roof Runoff Quality. Water 2014, 6, 2575-2589.

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