Characteristics of Metal Elements in both Gasoline and Engine Exhaust

• Main Authors: Jhy-Jiang Chen, 陳志強
• Other Authors: Ya-Fen Wang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/d35d2v

碩士 === 國立成功大學 === 環境工程學系碩博士班 === 90 === Abstract Seventy-two unleaded gasoline samples collected from A and B petrol company, and eighteen particulate samples collected with tube filter from the exhaust of the motorcycle engine were analyzed for twenty metal contents. Each particulate sample and unleaded gasoline sample was treated with acid extraction and pressurized digestion, respectively. The digested samples were then measured for metal elements using inductively coupled plasma/atomic emission spectrometry (ICP-AES). Twelve samples were collected and analyzed from each one of 92, 95 and 98 unleaded gasoline in the A petrol company. In 92 unleaded gasoline, the concentrations of the earth elements, Ca(31.1 mg/L)、Al(14.5 mg/L) and Fe(11.9 mg/L), the concentrations of the artificial elements, Pb(4.36 mg/L)、Zn(4.08 mg/L) and Ti(3.06 mg/L) were higher than the others. In addition, in 95 unleaded gasoline, the concentrations of the earth elements, Ca(31.3 mg/L)、Al(14.2 mg/L) and Fe(13.1 mg/L), the concentrations of the artificial elements, Pb(4.48 mg/L)、Zn(3.93 mg/L) and Ti(3.19 mg/L) were higher than the others. Furthermore, in 98 unleaded gasoline, the concentrations of the earth elements, Ca(29.2 mg/L)、Al(13.4 mg/L) and Fe(11.9 mg/L), the concentrations of the artificial elements, Pb(4.17 mg/L)、Zn(4.93 mg/L) and Ti(2.84 mg/L) were higher than the others. Comparing the concentration of the metal elements between A and B petrol company, Mg、Ba、Cr and Hg in A petrol company were higher than in B. However, Ag and Pb in B petrol company were higher than in A. Eighteen particulate samples from the exhaust of motorcycle engine were collected and analyzed. In 92 unleaded gasoline particulate samples, the concentrations of the earth elements, Ca(18.1 mg/g)、Mg(7.76 mg/g) and Al(7.72 mg/g), the concentrations of the artificial elements, Ba(3.26 mg/g)、Sr(0.69 mg/g)、Zn(0.07 mg/g) and Cr(0.05 mg/g) were higher than the others. In addition, in 95 unleaded gasoline particulate samples, the concentrations of the earth elements, Ca(17.2 mg/g)、Al(6.52 mg/g) and Mg(6.39 mg/g), the concentrations of the artificial elements, Ba(3.14 mg/g)、Sr(0.52 mg/g)、Zn(0.05 mg/g) and Cr(0.05 mg/g) were higher than the others. Furthermore, in 98 unleaded gasoline particulate samples, the concentrations of the earth elements, Ca(13.5 mg/g)、Mg(6.32 mg/g) and Al(5.48 mg/g), the concentrations of the artificial elements, Ba(2.54 mg/g)、Sr(0.41 mg/g)、Zn(0.08 mg/g) and Cr(0.04 mg/g) were higher than the others. The result of regression analysis showed there is a good correlation between metal concentration of the unleaded gasoline and that of the exhaust of the motorcycle engine. The square of correlation coefficient R is 0.889, 0.904 and 0.876, respectively, among the 92, 95, 98 unleaded gasoline samples and exhaust samples. The result indicated that metal elements in the unleaded gasoline most emitted from the exhaust of the motorcycle engine. Reducing metal concentrations in unleaded gasoline will basically solve the problem of metal distribution from the exhaust of motorcycle engine.