海鹽氣膠氯損失之研究

• Main Authors: Hsu, Yu-Mei, 徐玉眉
• Other Authors: Jeng, Fu-Tien
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/25926901822490837668

碩士 === 國立臺灣大學 === 環境工程學研究所 === 89 === The emission of chloride from the sea-salt aerosol dechlorination and other pathways, which produce most of the volatile inorganic chlorine in the marine boundary layer, was explored in his study. Most HCl was released in the acid-displacement reactions involving acidic gases scavenged by sea-salt aerosol. Gaseous ClNO2 and ClNO were formed from the uptake of N2O5 and O3. Based on the heterogeneous reactions between gases and sea-salt aerosols and the observed concentrations of HCl, NO, NO2, NH3, HNO3, O3, atmospheric aerosols sampled at Taipei, Pingtung, and Kaohsiung, the emissions of HCl, ClNO2, ClNO into the marine boundary layer were estimated. It was found that 75% to 98% of chloride in the sea-salt aerosol in Taipei station was released in the form of HCl, ClNO2, and ClNO, while they were 49% to 97% in Pingtung station and 86% to 99% in Kaohsiung station. More precisely speaking, HCl accounted for 18% to 97% of total chloride deficit in Taipei station, while 21% to 97% in Pingtung statio, and 10% to 97% in Kaohsiung station. ClNO2 accounted for 0% to 80% of total chloride deficit in Taipei station, while 0% to 10% in Pingtung statio, and 0% to 81% in Kaohsiung station. On the other hand, 0.1% to 17% inTaipei station, 0.000037% to 0.02% of total chloride deficit in Pingtung station, and 2% to 10% in Kaohsiung station, leaded to the production of ClNO. It was concluded that releases in the forms of HCl, ClNO2, and ClNO played important roles in chloride deficit of sea-salt aerosol in marine boundary layer, although release as ClNO might be neglected in Pintung. It was also found that, in daytime, release in the form of HCl was the most important pathway of chloride deficit of sea-salt aerosol in polluted area. In nighttime, release in the form of ClNO2 became dominant.