Question

Consider a case of the industrial estate with lead smelting units. For the sake of estimation, assume the air above the industrial estate and the surrounding civilian areas to be a homogenous (box) model, which has a rectangular shape extending 10 km in the x direction and 5 km in the y direction. The boundary layer height, below which the concentrations of lead in the air are relevant and are to be estimated, is 500 m from the ground level. Assume that there is a steady wind in the x direction with an average velocity of 3 m/s. The upwind (wind blowing into the city) concentration of lead is 2 mg/m3.

There are 28 lead smelting units within the industrial estate, with one stack in each of them; average lead concentration in the gas emissions from each stack is 12 mg/m3; the average velocity of gas emission from each stack is 7 m/s; diameter of stack is 450 mm.

Assume lead is removed from the air by a first-order reaction dependent on lead concentration, with a rate constant k = 2 d^(-1)
Estimate the steady-state lead concentration in the air in the city.
Note: Stacks are large industrial chimneys designed to emit and disperse hot air (flue), particulate matter, and pollutants into the atmosphere at such a height that they do not constitute a danger to surrounding life on the ground.

Answer 1

Answer:

bro answer is 98 . Can't give solution