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Memorias de investigación
Research Publications in journals:
Comparative evaluation of nitrogen oxides and ozone passive diffusion tubes for exposure studies
Year:2009
Research Areas
  • Environmental policy
Information
Abstract
Passive diffusion tubes are recognised as a cost-effective sampling method for characterising the spatial variability, as well as the seasonal and annual trends, of NO2 concentrations in urban areas. In addition, NOX and O3 passive diffusion tubes have been developed and deployed in urban and rural areas. Despite their many advantages (e.g. low operational and analysis cost, small size and no need for power supply), they have certain limitations mainly related to their accuracy and precision. In particular, the absorbent solution used, the length of the exposure period, the exact location and use of protective devices, and other environmental conditions (e.g. wind, ambient temperature and relative humidity) may have a significant impact on the performance of passive diffusion tubes. The aim of this study is to evaluate the performance of co-located NO2, NOX and O3 diffusion tubes in an urban environment. A one-year passive sampling campaign was carried out in Birmingham (UK) for this purpose. NO2, NOX and O3 diffusion tubes (including triplicate sets of each) were co-located at one urban background and two roadside permanent air quality monitoring stations equipped with standard gas analysers. In addition, meteorological data, such as wind speed and direction, ambient temperature and relative humidity, were obtained during the same period of time. A thorough QA/QC procedure, including storage and laboratory blanks was followed throughout the campaign. The analysis of results showed a very good agreement of NO2 passive samplers with co-located chemiluminescence analysers, but substantial underestimations of total NOX levels by the diffusion tubes. The O3 diffusion sampler appeared to marginally overestimate the automatic UV analyser results, especially during warm weather periods.
International
Si
JCR
Si
Title
ATMOSPHERIC ENVIRONMENT
ISBN
1352-2310
Impact factor JCR
2,89
Impact info
Volume
43
10.1016/j.atmosenv.2009.02.048
Journal number
0
From page
2509
To page
2517
Month
MAYO
Ranking
Participants
  • Autor: Sotiris Vardoulakis (London School of Hygiene )
  • Autor: Efisio Solazzo (University of Birmingham)
  • Autor: Julio Lumbreras Martin (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Tecnologías Ambientales y Recursos Industriales
  • Departamento: Ingeniería Química Industrial y del Medio Ambiente
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