Assessment of non-exhaust PM10 level and its composition at the roadside locations in Bangkok

การประเมินระดับของอนุภาคฝุ่นขนาด 10 ไมครอน ที่ไม่ได้เกิดจากไอเสียรถยนต์และองค์ประกอบที่บริเวณริมถนนในเขตกรุงเทพมหานคร

Name: Supawan Intoon

LCSH: Dust

LCSH: Dust -- Measurement

Abstract: The objectives of this research were to study the relationships of PM10, PMcoarse and PM2.5 and to study the relationships of PM10 and CO and NOx. The data were collected during January 2001 – October 2004 from three roadside stations and two urban background stations operated by the Pollution Control Department, Ministry of Natural Resources and Environment. The study of mass concentrations of PM10, PMcoarse and PM2.5 was based on the gravimetric method and were observed at Dindang roadside station. The data were pooled as pairs of PM10 - PM2.5, PM10 - PMcoarse and PM2.5 - PMcoarse. The ratios of the interest pairs of size range were calculated. That ratio was used to estimate PM concentrations of interest. The values of intercept from relationships of roadside enhancement PM10, CO and NOx were used to determine the fraction of non – exhaust PM10. Linear regression was applied as a statistical tool. The results showed that there is a relationship between PM10 and PM2.5 with 1% level of significance and the PM2.5/ PM10 ratio was 0.622 (r2 = 0.903). PM10 and PMcoarse with 1% level of significance and PMcoarse/ PM10 ratio was 0.378 (r2 = 0.539). The ratio of PMcoarse and PM2.5 was 0.568 (r2 = 0.374). It is found that the mass concentrations of PM10 and PM2.5 were higher in the dry season. The wet season had no effect on variation of PM concentrations. The relationship between roadside enhancement PM10 and roadside enhancement CO at Dindang station and Nonsiwitthaya school station showed that the fraction of non – exhaust PM10 in daily average PM10 at Dindang station was 0.40. The fraction of non – exhaust PM10 in daily average PM10 from the relationship between roadside enhancement PM10 and roadside enhancement NOx was 0.37. Both of the fraction values were similar. It was noticeable that the fraction of non – exhaust PM10 in daily average PM10 was higher during the wet season than in the dry season.

Mahidol University

Address: NAKHON PATHOM

Email: liwww@mahidol.ac.th

Name: Auemphorn Mutchimwong

Role: Thesis Advisors

Created: 2006

Modified: 2553-06-23

Issued: 2010-06-06

วิทยานิพนธ์/Thesis

application/pdf

ISBN: 9740478352

CallNumber: TH S959as 2006

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Appropriate Technology for Resources Development

Grantor: Mahidol University

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