electrostatic air filters

When a gas or an air stream containing aerosols in the form of dust, fumes or mist, is passed between two electrodes, then, the aerosol particles get precipitated on the electrode. Electrostatic Precipitator The following practices also help in controlling air pol..

a) Checking the air pollution by strict imposition of laws on factories. b) Reducing vehicular traffic and encouraging public transport vehicles than individual vehicles. c) Use of unleaded petrol. d) Regular check of exhaust gases from vehicles to declare their status in respect of poll..

The composition of air that we breathe in is: Nitrogen - 78% Oxygen - 21% Carbon dioxide - 0.03 - 0.04% Hydrogen - traces Noble gases - traces Thus the air naturally contains more oxygen than carbon dioxide. This oxygen-rich air is taken in by the nostrils. In the nas..

Air pollution can be controlled by different methods depending on the source and the pollutant. The different methods are: One of the major causes of air pollution are the automobiles. The fuels being used should be lead-free as this will reduce the level of lead in the atmosphe..

When the crystals are unstable, they are gently pressed between the folds of filter papers, and are finally placed in a vacuum desiccator to obtain dry crystals. If the substance is stable and has a high melting point, the crystals are pressed between the fold of the filter pap..

1. Carbon monoxide is colourless, neutral gas. 2. It burns in air or oxygen with a pale blue flame to form carbon dioxide. 3. Carbon monoxide has no action on limewater, whereas carbon dioxide turns limewater milky. 4. A strip of filter paper, dipped in a solution of palladium c..

Photocopier moves a document from the handler to the glass plate, where the pattern of the image is projected by lamps, mirrors and lenses onto a photoreceptor belt (or drum). The electrostatic charge on the belt fades in areas receiving light from the projected image. Magnetic rollers b..

Mechanism of Olfaction - The nasal passage is lined by the nasal mucosa that have hairs and mucou-secreting cells. The hairs act like filters to remove the dust particles from the inhaled air. The mucous secreted by Bowman's gland keeps the inhaled air moist. The chemi..

Gold-containing ore gets dissolved in KCN solution in the presence of air to give a solution containing K[Au(CN) 2 ]. Gold can then be recovered from this solution by either precipitation or electrolytic method. Electrostatic concentration and liquation are other methods of con..

The respiratory system starts with the nose that encloses the nasal cavity . The nasal cavity opens outside through the openings called the nostrils . The nasal cavity is divided into two portions by a cartilagenous septum and is lined by fine hairs that filter the dust particles fro..