Abstract
Exhaust gases from vehicle contain many air pollutants. Especially, diesel exhaust particles cause environmental problem in big cities. Therefore, it is necessary to carry out continuous monitoring of the air at various roadside spots representing different traffic conditions to grasp the present condition of air pollution from exhaust gases.
In this paper, a new convenient monitoring method for the atmospheric environment using micro fiber sheets at roadside spots is described. It was found that the micro fiber sheets were suitable for collecting air particles such as SPM. Comparing the amounts of particles and B (a) P collected by micro fiber sheets with those collected by using an air sampler at the same spot at the same time, the correlation coefficients were 0.797 and 0.945 respectively. The monitoring method using this micro fiber sheet is suggested to be an index of air pollution for one week. As a result of continuous monitoring at roadsides with different traffic conditions, the amounts of particles and B (a) P collected at intersections were higher than at straight roads far from intersections. The estimated concentrations of SPM were calculated to exceed 0.10 mg/m3 at highway intersections from January to April, and the estimated concentrations of B (a) P were calculated to be about 0.20 ng/m3 less than the national average in the general atmosphere.
