The interfacial mass transfer resistances of the ozone dry deposition over the field soil of Taichung County in Taiwan.
This study aims to design a dry deposition chamber and to measure ozone depletion over the Taichung field soil. This study seeks to verify the phenomena by an experimental and mathematical model. It is demonstrated that interfacial mass transfer resistances of ozone dry deposition involve reactive resistance (R(sr)) and kinetic resistance (R(sk)). It reveals the chemical reaction (O3 + NO --> NO2) to produce the reactive resistance, and verifies that the interfacial mass transfer resistances depend on nitrogen oxide emission and soil temperature. It shows that the interfacial mass transfer resistances are reduced with increasing soil temperature (T(S)). The model profiles are smaller than the observed data within a relative error of 15%. The reactive resistance decreases exponentially with increasing soil temperature; R(sr)(-1) (cm x sec(-1)) = 0.0001 exp (0.1455T(S)). The kinetic resistance decreases linearly with increasing soil temperature; R(sk)(-1)(cm x sec(-1)) = 0.0108T(S) + 1.4012. This model is more accurate with higher soil temperature and larger ozone concentration. Results are consistent with thermodynamics and reaction kinetics. Ozone dry deposition over agricultural soil causes conversion of nitrogen oxide (NO) to nitrogen dioxide (NO2).
Chang
Hsin-Min
HM
Graduate Institute of Environmental Engineering, National Taiwan University, Room 306, 71 Chou-Shan Road, Taipei, Taiwan. changk306@yahoo.com.tw
Chang
Len-Fu W
LF
Jeng
Fu-Tien
FT
D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D019149:Bioreactors; D007700:Kinetics; D008956:Models, Chemical; D009569:Nitric Oxide / Q000032:analysis / Q000737:chemistry*; D009585:Nitrogen Dioxide / Q000032:analysis / Q000737:chemistry*; D010126:Ozone / Q000032:analysis / Q000737:chemistry*; D012987:Soil; D012989:Soil Pollutants; D013624:Taiwan; D013696:Temperature
D000393:Air Pollutants; D012987:Soil; D012989:Soil Pollutants; D009569:Nitric Oxide; D010126:Ozone; D009585:Nitrogen Dioxide