Thitawadee Suvachananonda. Relationships on quantitative and measurement of TSP and PM10 . Master's Degree(Technology of Environmental Management). Mahidol University. : Mahidol University, 2005.
Relationships on quantitative and measurement of TSP and PM10
Abstract:
The objectives of this research were (1) to study particulate matter (PM) and
the relationship between total suspended particles (TSP), coarse particles (CP) and
particulate matter of less than 10 microns (PM10); and (2) to study the relationship
between the gravimetric high volume method (GHV) and the beta-ray absorption
method (BAM) method of PM measurement. PM data were collected between February
15, 2001 and February 15, 2004 at 13 air quality monitoring stations in the Bangkok
Metropolitan and suburban area by the Pollution Control Department – Ministry of
Natural Resources and Environment. All data were analyzed by simple linear regression
and correlation coefficient. The hypotheses were tested by the Independent t-test and
one-way ANOVA statistic.
The results showed that there is a relationship between TSP and PM10 with 1%
level of significance and that the mean PM10/TSP ratio of all monitoring stations was
approximately 0.52 with coefficient of determination (r2) of 0.48. Therefore, it is
possible to use this correction factor to predict PM10 from TSP. As with TSP and CP, the
correlation coefficient is significant at α = 0.01 and the mean CP/TSP ratio of all stations
was approximately 0.49 with the r2 of 0.73. However, the correlation coefficient
between CP and PM10 is not significant at α = 0.01. This suggests that there is no
relationship between CP and PM10.
The correlation coefficient of PM10 measurement between the GHV and BAM
method is significant at α = 0.01 and shows that there is a relationship between the GHV
and BAM method. The mean correction factor of ten stations (except three roadside
stations of the MOSTE, Department of Land Transportation and Chulalongkorn
Hospital) was approximately 1.26 with the r2 of 0.39. Therefore, it is possible to use this
correction factor to estimate the PMGHV from PMBAM concentration in this study area.
Mass concentrations of both TSP and PM10 at all stations were systematically
higher during the winter than in the summer and rainy seasons. However, the results also
showed that there were no seasonal patterns for PM10/TSP and PMGHV/PMBAM ratios.