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| Titel |
Can TiO2-based photocatalytic textiles be used to improve the urban air quality? |
| VerfasserIn |
Mila Ródenas, Eduardo Fages, Enrico Fatarella, David Herrero, Lidia Castagnoli, Esther Borrás, Teresa Vera, Tatiana Gómez, Marlon Catota, Javier Carreño, Daniel Hernández, Cristina Gimeno, Ramon Lopez, Amalia Muñoz |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250146507
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| Publikation (Nr.) |
 EGU/EGU2017-10535.pdf |
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| Zusammenfassung |
| Despite current legislation and efforts made to improve urban air quality, significant negative
effects still persist. That is the case of traffic, which impact on air pollution is a growing
problem. For this reason, depollution measures are necessary to reach safer air quality levels.
Recently, the use of titanium dioxide (TiO2) based photocatalytic self-cleaning and
de-polluting materials has been considered to remove air pollutants, especially NOx. TiO2
can be found in the market under different formats for environmental purposes, and its
effectiveness depends not only on the support (concrete, paints, etc) but also on the
impregnation method (layer, embedded, etc).
By combining laboratory and field campaigns, the LIFE PHOTOCITYTEX project was
conceived to demonstrate the effectiveness of using TiO2-based photocatalytic nanomaterials
in textiles as a way of alleviating the air pollution in urban areas. Within the project, which is
already within its last year, two one-year extensive passive dosimetric campaigns have
already been completed to assess their impact on the selected urban sites, measuring before
and after the installation of the photocatalytic textile prototypes, respectively. Also, intensive
active measurement campaigns (using active dosimetry, monitors and instrumentation for
physical parameters) have been conducted to account for winter and summer conditions.
Besides, lab-tests have been concluded to determine optimal photocatalytic formulations on
textiles, and these have been tested at the EUPHORE simulation chambers under typical
environmental conditions of various European cities. Besides the effect on NOx, which
has been the main focus of the study, VOCs formation and abatement has been
assessed, yielding in a better overall understanding of the whole process and its
implications.
Very promising results on the deep reduction of NOx have been observed at EUPHORE.
From the calculation of the uptake coefficient, a mathematical model tool foresees
an averaged NOx reduction of 2.5% under gentle wind conditions in the whole
volume of the tunnel location. Furthermore, in the urban campaigns, NOx and NO2
reductions above 20% have been found in the vicinity of the textile (10cm from the
textile).
An overview of the campaigns deployment will be given together with the results
obtained, with emphasis on the observed seasonal and temporal variability. Implications,
impact and possibilities of the use photocatalytic textiles as a remediation technique to
improve the air quality will be discussed.
Acknowledgements
PHOTOCITYTEX project (LIFE13 ENV/ES/000603) is acknowledged for supporting
this work. Fundación CEAM is partly supported by Generalitat Valenciana – Spain. |
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