L1 /
7
CH3041
DISPERSAL
• Air and water are
the major routes for
chemical dispersal.
chemical dispersal.
• The distance of
transport depends on the
reactivity of the chemical.
eg. SO2 < 4000 km, CFC-12 global
reactivity of the chemical.
eg. SO2 < 4000 km, CFC-12 global
• Dilution of the chemical occurs by transport and this effect must be calculated.
• Climatic and geographical features
will influence local concentrations.
eg. L.A. Smog, high [NOx] & [VOC], high hn.
will influence local concentrations.
eg. L.A. Smog, high [NOx] & [VOC], high hn.
• These physico-geographical parameters
need to be reported in any sampling program.
need to be reported in any sampling program.
