Environmental Engineering - Air Pollution

For the elevation and temperature data given in the table, the existing lapse rate in the environment is ________ °C/100 m (round off to two decimal places). Elevation from ground level (m) | Temperature (°C) ---|--- 5 |...

Which of the following statements is/are TRUE in relation to the Maximum Mixing Depth (or Height) 'Dmax' in the atmosphere?

A sample of air analyzed at 25 °C and 1 atm pressure is reported to contain 0.04 ppm of SO2. Atomic mass of S = 32, O = 16. The equivalent SO2 concentration (in µg/m³) will be _________. (round off to the nearest integer...

The liquid forms of particulate air pollutants are

Read the statements given below. (i) Value of the wind profile exponent for the 'very unstable' atmosphere is smaller than the wind profile exponent for the 'neutral' atmosphere. (ii) Downwind concentration of air pollut...

A sample of air analysed at 0°C and 1 atm pressure is reported to contain 0.02 ppm (parts per million) of NO2. Assume the gram molecular mass of NO2 as 46 and its volume at 0°C and 1 atm pressure as 22.4 litres per mole....

There are 20,000 vehicles operating in a city with an average annual travel of 12,000 km per vehicle. The NOx emission rate is 2.0 g/km per vehicle. The total annual release of NOx will be

A coal containing 2% sulfur is burned completely to ash in a brick kiln at a rate of 30 kg/min. The sulfur content in the ash was found to be 6% of the initial amount of sulfur present in the coal fed to the brick kiln....