Innovative Characteristic Assessment of Air Pollution in Bangkok
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Abstract
In Thailand, the major air pollutants include Sulfur dioxide, Nitrogen dioxide, Carbon monoxide, Ozone, and Particulate matter. At present, the air pollutant that remains a major problem is particulate matter. Especially in areas with heavy traffic in Bangkok. The study findings of the trend of air pollution in Bangkok for the past 10 years, revealed that, in most air quality measuring stations, sulfur dioxide and nitrogen dioxide tended to decrease whereas carbon monoxide, ozone, and PM10 tended to be different depending on stations. The primary pollutants tended to have positive relationships. Ozone, the secondary pollutant, could not see a positive relationship with other parameters. PM10 attended to increase, exceeding standards, in winter of every year. In winter, the weather was dry, and the relative humidity decreased, resulting in the long lingering dust in the air. The emission of primary pollutants revealed that they would have the highest concentration in the morning and gradually decrease until the evening, mainly depending on traffic congestion. The concentration of air pollution was high at each time of congested traffic. A positive relation was found between nitrogen dioxide and the amount of traffic as nitrogen dioxide came from direct fuel combustion in cars.
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