Concentration Variability of Halocarbons over an Electronics Industrial Park and Its Implication in...
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![Page 1: Concentration Variability of Halocarbons over an Electronics Industrial Park and Its Implication in Compliance with the Montreal Protocol ENVIRONMENTAL.](https://reader035.fdocument.pub/reader035/viewer/2022062719/56649ee85503460f94bf8fb9/html5/thumbnails/1.jpg)
Concentration Variability of Halocarbons
over an Electronics Industrial Park and Its Implication in Compliance with
the Montreal ProtocolENVIRONMENTAL SCIENCE & TECHNOLOGY VOL. 35, NO. 16, 2001
Speaker: Ann
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http://www.esrl.noaa.gov/news/2007/ozone2007.html
Ozone hole
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Target compounds
CFC-113 、 CCl4 、 CFC-12 、 CFC-11 、 CH3CCl3 、
C2HCl3 、 C2Cl4
RCl + hv → R + Cl
Cl + O3→ ClO + O2
ClO + O → Cl + O2
Net reaction : O3 + O → 2O2
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Sampling locations
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Instruments
☆ In-situ (2000) - Park : GC / ECD
☆ Flask (2000) - Park : GC / MS
☆ Flask (1997) - Park : GC / ECD
☆ Flask (1997) - Coastal : GC / ECD
☆ Column : DB-1 ( 60 m X 0.32 mm X 1.0 μm )
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In-situ chromatogram
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Concentration distributionIn July 2000 (Flask)
In March 1997 (Flask)
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Concentration variability
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Relative concentration variation
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Relative concentration variation
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Relative concentration variation
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Concentration v.s wind direction
0 °
90 °
180 °
270 °
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Concentration v.s wind direction
CCl4 CFC-113
CFC-12 CFC-11
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Concentration vs. wind direction
CH3CCl3
C2HCl3 C2Cl4
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Conclusions
☆The in-situ measurement method can be more precisely recorded and better rationalized than the flask measurement method.
☆ The minor emissions of CFC-113 and CCl4 detected by the in-situ method combining with wind data suggest that good compliance with the Montreal Protocol.
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Thank you for your attention