Question

2. Before vehicle emissions were well-regulated co emissions were 66 g/mile. Assume this emission rate applies for an airshed. The airshed has dimensions of 9 km by 18 km with wind speeds of 1.5 m/s parallel to the longer dimension. There is a temperature inversion at 100 m. The average vehicle miles traveled is 800,000 miles each hour between 5 AM and 8 PM, and the concentration of CO before the morning rush hour and the incoming wind concentration are both 200 ppb. Temperature is 0 °C and pressure is 0.9 atmospheres a) Find Co and Cin in mg/m. b) What is the pollutant residence time in the box? c) If morning rush hour starts at 5 AM. What is the CO concentration seven hours later?

Answer 1

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