申論題

2. PM2.5 is one of the major air pollutants globally and is composed of various chemical species. EPA-Taiwan provides the emission data on the website for the whole Taiwan. The total emission is 1.1x 10⁸ Kg/yr for SO₂ and 3.6x10⁸ Kg/yr for NOx (assuming as NO for this exam) over the Taiwan island(此為台灣總排放量) (Atomic weight: S (32g/mole), N (14g/mole), O (16g/mole), H (Ig/mole) ).
Consider only local emissions. We assume that all of the emitted NOx and SO₂ are precipitated back over Taiwan as HNO₃ (I mole of NOx forms 1 mole of HNO₃) and H₂SO₄ (1I mole of SO₂ forms I mole of H₂SO₄.), respectively. The area of Taiwan is 36200 km² and the mean precipitation rate is 6 mm . Assume that HNO₃ and H₂SO₄ are the only impurities in the rainwater,