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Can green roof act as a sink for contaminants? A methodological study to evaluate runoff quality from green roofs
- Source :
- Environmental Pollution. 194:121-129
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- The present study examines whether green roofs act as a sink or source of contaminants based on various physico-chemical parameters (pH, conductivity and total dissolved solids) and metals (Na, K, Ca, Mg, Al, Fe, Cr, Cu, Ni, Zn, Cd and Pb). The performance of green roof substrate prepared using perlite, vermiculite, sand, crushed brick, and coco-peat, was compared with local garden soil based on improvement of runoff quality. Portulaca grandiflora was used as green roof vegetation. Four different green roof configurations, with vegetated and non-vegetated systems, were examined for several artificial rain events (un-spiked and metal-spiked). In general, the vegetated green roof assemblies generated better-quality runoff with less conductivity and total metal ion concentration compared to un-vegetated assemblies. Of the different green roof configurations examined, P. grandiflora planted on green roof substrate acted as sink for various metals and showed the potential to generate better runoff. � 2014 Elsevier Ltd. All rights reserved.
- Subjects :
- Conservation of Natural Resources
Bioremediation
Biosorption
Cadmium
Copper
Lead
Magnesium
Metal ions
Metals
Runoff
Soils
Water quality
Crushed bricks
Green roof
Green roof substrates
Metal ion concentration
Methodological studies
Physicochemical parameters
Runoff quality
Total dissolved solids
Roofs
aluminum
calcium
carbonic acid
chromium
copper
iron
lead
magnesium
nickel
potassium
rain
runoff
sodium
zinc
metal
soil
water pollutant
angiosperm
bioremediation
concentration (composition)
pollutant source
water quality
adsorption
article
bulk density
comparative study
concentration (parameters)
environmental aspects and related phenomena
green roof
heavy metal removal
leaching
nonhuman
particle size
pH
pollution control
Portulaca grandiflora
vegetation
water contamination
analysis
building material
chemistry
environmental monitoring
environmental protection
procedures
Biodegradation, Environmental
Construction Materials
Environmental Monitoring
Rain
Soil
Water Pollutants, Chemical
Health, Toxicology and Mutagenesis
Vermiculite
Conductivity
Toxicology
Sink (geography)
Geotechnical engineering
geography
geography.geographical_feature_category
Environmental engineering
General Medicine
Pollution
Perlite
Environmental science
Surface runoff
Subjects
Details
- ISSN :
- 02697491
- Volume :
- 194
- Database :
- OpenAIRE
- Journal :
- Environmental Pollution
- Accession number :
- edsair.doi.dedup.....b82398e9a95995bbe42d9190268727f2