Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Effect of negative air ions on fog and smoke

Sawant, VS and Meena, GS and Jadhav, DB (2012) Effect of negative air ions on fog and smoke. Aerosol and Air Quality Research, 12 (5). pp. 1007-1015.

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A negative electric discharge voltage generator (NAI Generator) was designed and used to investigate the possibility of reducing (neutralizing) fog, dhoop smoke, and vehicle smoke collected in closed glass containers. The experiment was carried out in a dark room, and two identical glass containers were used. Various sensitivity tests were carried out with fog and smoke. Light intensity was measured for each run as a function of time with and without a negative air ion generator. Negative air ions attach to particulate matter to enhance visibility. At a high negative ion emission rate, the particle mobility becomes sufficient so that particle migration results in their deposition on walls and other indoor surfaces. The performance characteristics of the negative electric discharge generator designed in this work, which produces uni-polar ions by corona discharge at a relatively high emission rate, were evaluated. This device, if operated continuously for six minutes, resulted in the removal of about 93 to 97 of the particles in the glass container, in addition to the natural decay effect. The rate of change of particle removal was higher for fog than for smoke. This study demonstrates that it is possible to neutralize and reduce the concentration of fog and smoke to a significant degree using negative air ions, resulting in increasing visibility in a closed chamber.

Item Type: Article
Additional Information: Copyright of this article belongs to Taiwan Association for Aerosol Research.
Uncontrolled Keywords: Air pollutants; Closed chambers; Corona discharges; Dark room; Discharge voltages; Electric discharge generators; Emission rates; Function of time; Glass containers; Ion emissions; Light intensity; NAI generator; Natural decay; Negative air ion; Particle migration; Particle mobility; Particle removal; Particulate Matter; Performance characteristics; Rate of change; Removal efficiencies; Sensitivity tests, Containers; Electric corona; Electric discharges; Fog; Smoke; Visibility, Ions, atmospheric pollution; concentration (composition); fog; ion; light intensity; neutralization; particle motion; pollutant removal; removal experiment; smoke; traffic emission; visibility
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 04 Jan 2014 19:28
Last Modified: 04 Jan 2014 19:28

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