NDLI: Particle size distribution of n-alkanes and polycyclic aromatic hydrocarbons (PAHS) in urban and industrial aerosol of Algiers, Algeria.

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Particle size distribution of n-alkanes and polycyclic aromatic hydrocarbons (PAHS) in urban and industrial aerosol of Algiers, Algeria.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ladji, R. Balducci, C. Cecinato, A. Yassaa, N.
Spatial Coverage	Algeria
Description	Author Affiliation: Ladji R ( Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (C.R.A.P.C), BP 248, Algiers RP, 16004, Algeria, rladji@hotmail.com.)
Abstract	The distribution of ambient air n-alkanes and polycyclic aromatic hydrocarbons (PAHs) associated to particles with aerodynamic diameters lesser than 10 µm (PM(10)) into six fractions (five stages and a backup filter) was studied for the first time in Algeria. Investigation took place during September of 2007 at an urban and industrial site of Algiers. Size-resolved samples (<0.49, 0.49-0.95, 0.95-1.5, 1.5-3.0, 3.0-7.2, and 7.2-10 µm) were concurrently collected at the two sampling sites using five-stage high-volume cascade impactors. Most of n-alkanes (~72 %) and PAHs (~90 %) were associated with fine particles ≤ 1.5 µm in both urban and industrial atmosphere. In both cases, the n-alkane contents exhibited bimodal or weakly bimodal distribution peaking at the 0.95-1.5-µm size range within the fine mode and at 7.3-10 µm in the coarse mode. Low molecular weight PAHs displayed bimodal patterns peaking at 0.49-0.95 and 7.3-10 µm, while high molecular weight PAHs exhibited mono-modal distribution with maximum in the <0.49-µm fraction. While the mass mean diameter of total n-alkanes in the urban and industrial sites was 0.70 and 0.84 µm, respectively, it did not exceed 0.49 µm for PAHs. Carbon preference index (~1.1), wax% (10.1-12.8), and the diagnostic ratios for PAHs all revealed that vehicular emission was the major source of these organic compounds in PM(10) during the study periods and that the contribution of epicuticular waxes emitted by terrestrial plants was minor. According to benzo[a]pyrene-equivalent carcinogenic power rates, ca. 90 % of overall PAH toxicity across PM(10) was found in particles ≤ 0.95 µm in diameter which could induce adverse health effects to the population living in these areas.
ISSN	09441344
Issue Number	3
Volume Number	21
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2014-02-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aerosols Analysis Air Pollutants Alkanes Polycyclic Hydrocarbons, Aromatic Air Algeria Atmosphere Chemistry Benzo(a)pyrene Environmental Monitoring Industry Particle Size Vehicle Emissions Journal Article Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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