Smoke consists of particles of solid substances suspended in gas. Fog is made up of suspended droplets. In cigarette smoke, as in many industrial processes, smoke and fog are frequently present together. The removal of particles contained in gases - predominately waste gases - is increasingly gaining in importance, both in everyday life and industrially, because frequently the particles and the substances absorbed on them are toxic. Well known examples are adsorbed polycyclic aromatics on soot particles in diesel exhaust, and dioxins, heavy metals and radioactive elements in waste gases
from power stations and waste incinerators.
The deposited filter dusts are highly toxic, and must be treated as hazardous waste. The experimental set-up used here also enables constituents of cigarette smoke to be semi-quantitatively deposited even in quite large amounts, so that they can be extracted with light petrol and be examined.
Clean cigarette smoke using high voltage.
What you can learn about
Introduction to gas purification systems
Effect of an electrostatic filter for the separation process
How an electrostatic flue gas cleaning works