| Abstract | The study is an attempt to evaluate air pollution inventory of Bangkok from two major sources, mobile and stationary combustion sources. Five major primary pollutants were considered: carbon monoxide, hydrocarbons, sulfur oxides, nitrogen oxides and particulates.
Pollution loads from motor vehicles were estimated by applying adjusted emission factors to the existing available traffic data. A stack testing program was carried out to determine emission factors
for evaluation of pollution loads from industrial plants and power plants. Daily emissions of particulates, sulfur dioxide, nitrogen oxides, carbon monoxide and hydrocarbons are estimated to be 33, 210, 50, 500
and 60 tons respectively. Gasoline combustion accounts for 98% of the CO-emissions and 69% of RC-emissions. The largest emitters of S02 are
power plants accounting for 79% of the S02-emissions. Both power plants and diesel engines are great emitters of particulates, the former being
the largest single source emitters. Gasoline and diesel engines are the highest contributors to the NOx emissions. Ranking the pollutants by the Pindex technique, sulfur dioxide
became the most serious air pollution problem in Bangkok, with particulates second and nitrogen oxides a strong third. With source emissions, power plants are the major emitters followed by diesel and gasoline
engine vehicles. |