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Measurement of BTEX (benzene, toluene, ethybenzene, and xylene) levels at urban and semirural areas of Algiers City using passive air samplers.

Journal of the Air & Waste Management Association (1995) (2013-02-01)
Yacine Kerchich, Rabah Kerbachi
ABSTRACT

The study presents the levels of air pollution by aromatic organic compounds BTEX (benzene, toluene, ethylbenzene, o-, m-, and p-xylenes) in the city of Algiers. The sampling was carried out using Radiello passive sampler. Three sampling campaigns were carried out in roadside, tunnel, urban background, and semirural sites in Algiers. In order to determine the diurnal mean levels of air pollution by BTEX to which people are exposed, a modified passive sampler was used for the first time. In addition, monitoring of pollution inside vehicles was also made. In the spring of 2009, more than 27 samplings were carried out. In the background and road traffic sites the Radiello sampler was exposed for 7 days, whereas the time exposure was reduced to 1 day in the case of the vehicle as well as the tunnel. The results indicate that average benzene concentrations in the roadside and inside vehicle exceed largely the limit value of 5 microg m(-3) established by the European Community (EC). On the other hand, it has been noticed that the concentration levels of other BTEX are relatively high. Also, in order to identify the origin of emission sources, ratios and correlations between the BTEX species have been highlighted. This study shows that road traffic remains the main source of many local emission in Algiers. The vehicle fleet in Algeria is growing rapidly since the 1990s following economic growth and is responsible for the increasing air pollution in large cities. Because there are no data collection of BTEX carried out by national air quality network, all environmental and transportation policies are based on European emissions standards, but national emission standards are currently not in place. This work will contribute to the analysis of real emissions of BTEX in Algiers, for the development of management and for assessment of population exposure variation depending on the location in the city of Algiers.

MATERIALS
Product Number
Brand
Product Description

radiello Barcode Labels, pk of 198
Supelco
radiello BTEX Calibration Kit (CS2 Desorption)
Supelco
radiello BTEX Calibration Kit (Thermal Desorption)
radiello Clips, suspending Radiello triangular support plate, pk of 20
radiello Filtration Kit, pk of 20
radiello Outdoor Shelter, pk of 10
radiello Replacement Mounting Strips, for use with Radiello Outdoor Shelter, pk of 100
Supelco
radiello VOC Calibration Kit (Workplace Environment)
Sigma-Aldrich
Toluene, anhydrous, 99.8%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Benzene, anhydrous, 99.8%
Sigma-Aldrich
Toluene, suitable for HPLC, 99.9%
Supelco
Benzene, analytical standard
Sigma-Aldrich
Toluene, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%
Sigma-Aldrich
Benzene, suitable for HPLC, ≥99.9%
Sigma-Aldrich
Benzene, ACS reagent, ≥99.0%
Sigma-Aldrich
Ethylbenzene, anhydrous, 99.8%
Supelco
Toluene, analytical standard
Sigma-Aldrich
Toluene, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.7% (GC)
Supelco
Ethylbenzene, analytical standard
Supelco
Benzene, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Toluene, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Benzene solution, certified reference material, TraceCERT®, 200 μg/mL in methanol
Sigma-Aldrich
Benzene, puriss. p.a., reag. Ph. Eur., ≥99.7%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Toluene, Laboratory Reagent, ≥99.3%
Sigma-Aldrich
Ethylbenzene, ReagentPlus®, 99%
Supelco
Toluene solution, certified reference material, 5000 μg/mL in methanol
Supelco
Ethylbenzene solution, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in.
Supelco
radiello Methylene Blue Calibration Standard for H2S (Hydrogen Sulfide), pkg of 100 mL