A study on transformative ratio of sulfate and nitrate in receptor modeling-using Da Jia and Hou Li as study sites

• Main Authors: Chun-Kai Ruan, 阮俊凱
• Other Authors: 望熙榮
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/04787039253855913930

碩士 === 國立中興大學 === 環境工程學系 === 93 === Pollution source category in Taiwan includes stationary source, mobile source, fugitive source and secondary aerosol (sulfate, nitrate). Photochemistry reactions transform SOx and NOx emission from atmosphere into SO4-2 and NO3- , but it is different from ordinary condition which pollutants emitted. If they are regarded as pollution source to proceed with model simulation, the results only understand SO4-2 and NO3- contaminative situation, but they can’t find out actual source of SO4-2 and NO3-. The study expects to add the emission of SO4-2 and NO3- to source profile, and look into source of SO4-2 and NO3- . In the SOx ( NOx ) transportation process from emission spot to receptor site, we assume the ratio which transform SOx ( NOx ) into SO4-2 ( NO3- ) as a constant, and add it to source profile to carry out model simulation. Further, it proceed to compare, attempt to find out the two pollutants (SO4-2 and NO3- ) influence on source contribution in the different transform ratio. From the model simulation with 45 % transformative ratio of SOx , we find out the major SO4-2 source of Da Jia site may refer to traffic, Cu manufacturing factory and Al manufacturing factory ; major SO4-2 source of Hou Li site could caused by incinerator, traffics and ironworks. 1~3% transformative ratio of NOx proceeds with model simulation, major NO3- source of Da Jia site would due to ironworks, incinerator, and Cu manufacturing factory; major NO3- source of Hou Li site may come from traffic and Al manufacturing factory. When it exists in transformative ratio of SOX and NOX simultaneously, it can find that transformative ratio of SOX and NOX in the daytime is different from the night. Transformative ratio of NOx in the Da Jia and Hou Li is 1% at night, but the ratio of SOx at Da Jia and Hou Li is 50% and 30%, respectively. Major SO4-2 and NO3- source of Hou Li site in the night included traffic, Cu manufacturing factory and Al manufacturing factory; major SO4-2 and NO3- source of Da Jia site in the night included incinerator, Cu manufacturing factory, fugitive dust, Al manufacturing factory and traffic. Transformative ratio of SOx at Da Jia and Hou Li is 50% in the daytime, but transformative ratio of NOx at Da Jia and Hou Li is 6% and 1%, respectively. Major SO4-2 and NO3- source of Hou Li site in the daytime included incinerator, ironworks, traffic, Al manufacturing factory; Major SO4-2 and NO3- source of Da Jia site in the daytime included incinerator, Cu manufacturing factory, traffic and Al manufacturing factory.