The use of passive sampling in designing an optimised Continuous Air Quality Monitoring System

1
The use of passive sampling in designing an
optimised Continuous Air Quality Monitoring System

• BAQ Conference
• Ivo ALLEGRINI, Francesca COSTABILE, Maria Pia
  ANCORA

2
CURRENT KNOWLEDGE

• FWD96/62/EC the number of monitoring stations
  must be reduced as more as possible ? their
  spatial representativeness is a key-point for
  classifying AQ assessment.
• The issue of representativeness, however, has
  been overlooked
• ?lack of a quantitative method to describe the
  concept of representativeness
• ?inconsistent comparison for monitoring data
  among different sites.

3
(No Transcript)
4
Preliminary assessment

• Its a very important step for the definition of
  network design. The final locations are selected
  according to
• type and intensity of emitting sources
• distribution of polluting sources in the urban
  area
• expected maximum concentration points in
  relationship to the presence of human targets
  (population exposure)
• prevailing meteorological conditions
• model applications
• geographical context
• other proper studies.

5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
Spatial frequency distributions? diffusion
mechanism in atmosphere
SPACE SERIES WITHOUT RELEVANT EMISSION SOURCES?
Normal FD
SPACE SERIES WITH RELEVANT EMISSION SOURCES?no
Normal FD
Source Costabile, F., Bertoni, G., Desantis, F.,
Wang, F., Hong, W., Liu, F., Allegrini, I., 2006.
A preliminary assessment of major air pollutants
in the city of Suzhou, China. Atmospheric
Environment 40 (33), 6380-6395.
13
Example IDENTIFICATION OF TYPE-C (Traffic)
stations
14
(No Transcript)
15
(No Transcript)
16
Conclusions (1)

• The preliminary assessment can be used to
  design the network
• Select the representativeness of zones,
• Macrodesign the network,
• Microdesign the monitoring stations.

17
Conclusions (2)

• The measurement of spatial frequency distribution
  of pollutants can be used to microdesign the
  network
• Equipment of each monitoring station
• Spatial representativeness of each measurement
• A simple passive network (e.g.12 locations) may
  fully complement fixed stations for better
  spatial representativity

18
Thank youQA