Rushdi... Air is one important third of our environment. Our senses, sight, hearing and smelling are the first and mostly available sensors for air pollution. Smog and smoke are mixtures of vapours and pollutants gases. You may feel the sweetness of air to indicate the presence of sulfur compounds. Acidic gases will directly affect the eyes. Nowadays a group of efficient sensors are available (Portable) and also can quantitatively measure the various gases. Dust is a major air pollutant. It is not the dust particles themselves but also the possible other heavy metals or inorganic pollutants that may loaded on dust particles.... The list is big. We may goo farther if you like... Good luck

Measurement of gaseous and particulate pollutants (other than the SOx, NOx, COx and heavy metals) can be performed by a range of technologies that basically include passive and active methods. Passive sampling can involve, very basic techniques, eg, the use dust fall out buckets for dust pollution measurement, for point sources like crushing plants and emission stacks, and absorbent based devices strategically positioned for drifting pollutants to lodge and/or diffuse on a liquid/solid medium. Advice for ppropriate techniques and equipment must be sought, for example, if we are to bear in mind that correct construction and absorbent materials that do not react with the pollutants must be used.

Active sampling may involve sampling polluted air with pumps in work environments, industrial fields and residential areas. Powered air sampling equipment can be posted on static locations or attached to persons, who are part of a survey sample, for a defined period (usually 8-hour working day in work environments). Samples collected are then analysed in the lab where appropriate methods are used. Particulate pollutants commonly PM10, PM2.5 can be filterd out and measured, pollutants in sollution can be chemically analysed or dried out and measured.

It is also important to note that air quality monitoring equipment is now available to detect and monitor concentrations of air pollutants instantly in the work environments and various other scenarios.

The measurement of gaseous and particulate pollutants concentration (other than the SOx, NOx, COx and heavy metals) can be analyzed by a range of technologies that basically include passive and active methods. Passive sampling can involve, very basic techniques, eg.., the use dust fall out buckets for dust pollution measurement, for point sources like crushing plants and emission stacks, and absorbent based devices strategically positioned for drifting pollutants to lodge and/or diffuse on a liquid/solid medium. Advice for appropriate techniques and equipment must be sought, for example, if we are to bear in mind that correct construction and absorbent materials that do not react with the pollutants must be used.

Interesting, following

Interesting, following