| Autor: |
Owoade OK; Environmental Research Laboratory (ERL), Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria. oowoade@oauife.edu.ng, Fawole OG, Olise FS, Ogundele LT, Olaniyi HB, Almeida MS, Ho MD, Hopke PK |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of the Air & Waste Management Association (1995) [J Air Waste Manag Assoc] 2013 Sep; Vol. 63 (9), pp. 1026-35. |
| DOI: |
10.1080/10962247.2013.793627 |
| Abstrakt: |
Size segregated suspended particulate matter (PM2.5 and PM2.5-10) were collected using Gent low-volume air sampler at four different receptor site-classes in Lagos Mega City, Nigeria. The particulate mass loading was quantified and the concentration was analyzed to examine the pattern and variation from one receptor site-class to another. The PM2.5/PM10 ratio varied among the site-classes with the residential and marine sites having the least and highest ratio of 0.31 +/- 0.13 and 0.49 +/- 0.17 respectively. Particulate loading was higher on weekdays than on weekends (by a factor of about 1.5) in all but the marine site-class.The mean PM2.5/PM10 ratio is 0.41 +/- 0.15, which suggests that traffic emission is not the principal source of the Particulate Matter (PM). The INAA assay of the particulates detected ten elements: As, Br, Ce, K, La, Mo, Na, Sb, Sm and Zn. Except for Br, Mo and Sb, the detected elements were more pronounced in the coarse-fractioned filter Principal Component Factor Analysis (PCFA) of the detected elements identified some common sources (traffic-related, traffic emission, sea-salt and industrial emission) for both PM fractions at the four receptor site-classes. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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