Investigation of Elemental Compositions in Ambient Particulates within Lukang and Erlin Areas

• Main Authors: Chia-Ju Tseng, 曾嘉汝
• Other Authors: 鄭曼婷
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/87928565926169584133

碩士 === 國立中興大學 === 環境工程學系所 === 97 === Atmospheric aerosol particles were collected in Lukang and Erlin areas by using High Volume Air Samplers during the period from November 2008 to May 2009. Totally 21 samples of PM2.5 and PM2.5-10 were collected. The samples were then further analyzed to determine the concentration of 20 elements (Al, Fe, Na, Mg, K, Ca, Sr, Ti, Mn, Co, Ni, Cu, Zn, Cd, Sb, Pb, V, Cr, As and Se) by using inductively coupled plasma mass spectrometry (ICP-MS). The purpose of this study was to establish the fundamental data regarding the compositions of the ambient particulates before the operation of Phase IV Central Science Park at Erlin and the building of power plant at Lukang. This study will provide the reference for comparing the air quality before and after the construction of the science park and the power plant. The results showed that the total concentration of the 20 elements in PM2.5 and PM2.5-10 were 5.46% and 16.60% , respectively, during the northeast monsoon in winter at Erlin, whereas 3.10% and 9.28% , respectively, for the spring. Data obtained at Lukang indicated the total concentration of the 20 elements for PM2.5 and PM2.5-10 were respectively 8.01% and 17.88% in winter, 3.41% and 11.06% , respectively, in spring. Both areas had shown that the percentage of the elements in PM10 measured during the northeast monsoon period were higher than those obtained in spring. The enrichment factor was used to identify the sources of the aerosol particles. The results showed that the crustal elements were Al, Ti, Mg, K, Fe, Sr, and Ca, mainly distributed in PM2.5-10 and the anthropogenic elements were As, Cu, Zn, Cd, Pb, Se, and Sb, which were found mainly in PM2.5. Comparing the results obtained in the winter and in the spring, the element contents in the ambient particles at both sampling sites were all higher during the northeast monsoon period. The reason caused such differences was due to the higher wind speed which causing the crustal elements significantly increased. In conclusion, this study showed the crustal elements in the particulates at Erlin were significantly increased in the northeast monsoon. However the air quality at Lukang might be affected by the thermal power plant and the incinerator both located in the north of Lukang. The former may affect the concentrations of As and Se and the incinerator may affect the concentrations of Cd and Zn.