| Issue |
E3S Web Conf.
Volume 667, 2025
5th International Conference on Advances in Environmental Engineering (AEE2025)
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 9 | |
| Section | Advances in Environmentally Oriented Waste Utilization | |
| DOI | https://doi.org/10.1051/e3sconf/202566702002 | |
| Published online | 21 November 2025 | |
Impact of Simulated Physical Weathering on the Chemical Properties and Nutrient Availability of Extensive Green Roof Substrates Amended with Biochar and Porous Concrete
Department of Chemistry, Faculty of Education, Trnava University in Trnava, Priemyselná 4, P.O. Box 9, Trnava, SK-918 43, Slovak Republic
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
This study examines the effect of simulated physical weathering on the chemical properties and nutrient availability of extensive green roof substrates amended with nutrient-rich sewage sludge biochar and adsorptive components (wood-derived biochar and porous concrete). The amendments improved water-holding capacity and air-filled porosity in fresh substrates. After laboratory ageing via wetting/drying and freezing/thawing cycles, amended substrates showed reduced total dissolved solids and nutrient leaching. Aged biochar-amended substrates (SB and SBP) retained more nitrogen and exhibited gradual phosphorus release, highlighting the slow-release potential of sewage sludge biochar. These results suggest that simulated weathering provides a useful, controlled method for evaluating substrate degradation and nutrient dynamics and may help predict long-term substrate performance under rooftop conditions.
© The Authors, published by EDP Sciences, 2025
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