Dataset Edition

Présentation générale
Nom du jeu de donnéesVOC mixing ratios at emission in Abidjan
Créé le2019-07-16
Projet(s)DACCIWA > WP2 - Air Pollution and Health
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)

Accès aux données Dataset as provided by the Principal Investigator


Description du jeu de données
RésuméDirect measurements of VOC mixing ratios at emission were performed to obtain VOC emission profiles and VOC emission factors from the main anthropogenic sources in Abidjan. The sources include traditional ones like road transportation, and SWA regional specific ones such as domestic waste burning, charcoal fabrication, charcoal burning as well as wood fuel burning
Strategie d'observation− For road transportation, analysis of different vehicle exhaust measurements was carried out. Samples integrate five road transportation sub-categories: heavy-duty diesel vehicles (HDDV, trucks, and buses – 6 samples on Tenax and Carbopack tubes), light-duty diesel vehicles (LDDV, diesel cars, 4 samples on Tenax tubes), light-duty gasoline vehicles (LDGV, gasoline cars, 4 samples on Tenax tubes), two-wheel two-stroke (TW 2T, 6 samples on Tenax and Carbopack tubes) and two-wheel four-stroke (TW 4T, 4 samples on Tenax and Carbopack tubes) vehicles. Differences in fuel type (gasoline and diesel) and the fleet age have been considered. In African countries, two-wheeled vehicles (two-stroke or four-stroke engines) frequently use a mixture of oil and gasoline derived from smuggling, which is characterized by high pollutant emissions (Assamoi and Liousse, 2010).
− Regarding domestic waste-burning (WB), samples were obtained (5 samples on Tenax tubes) at the official domestic landfill site located to the east of Abidjan (AD, Figure 1 and Table 2). The sampling was performed inside the waste burning plume to integrate the different combustion processes involved.
− Charcoal-burning (CH) and wood fuel burning (FW) are common cooking and heating practices in African urban areas. FW emissions were obtained by measuring the fire plume of tropical African hardwood, specifically Hevea (Hevea brasiliensis). FW and CH were burned in two types of stoves traditionally used in the SWA region for cooking, which are made of metal and baked earth. The measurements included all the combustion phases (Keita et al., 2018) (3 samples on Tenax and Carbopack tubes).
− The charcoal-making (CHM) profile was obtained by measuring emissions from traditional kilns, that use different types of dense wood. The kiln was covered with a layer of leaves and another one of soil of about 10 cm thickness. The smoke was sampled through holes made in the CHM kiln, which are located in the horizontal plane, and provide the air circulation for the pyrolysis propagation (Keita et al., 2018) (2 samples on Tenax and Carbopack tubes).
All samples were obtained in the emission plume at around 1–1.5m from the source, except for vehicles where samples were taken at the tailpipe outlet while the vehicle’s engine was idling. Carbon monoxide (CO) and carbon dioxide (CO2) measurements were also performed on the emission sources together with the VOC measurements. For this, the QTRAK-7575 sensor (TSI, Keita et al., 2018) was used to measure real-time CO2 and CO gas concentrations. CO is measured by using an electrochemical sensor with a sensitivity of 0 to 500 ppm with ±3% accuracy. CO2 concentrations are obtained by using a non-dispersive infrared detector with a sensitivity of 0 to 5000 ppm with an accuracy of ±3 %.
RéférencesDominutti et al., 2019. Anthropogenic VOC in Abidjan, southern West Africa: from source quantification to atmospheric impacts Atmos. Chem. Phys. Discuss.
Description de l'instrument
Type d'instrumentIn Situ/Laboratory Instruments > Chemical Meters/Analyzers > GAS SENSORS
Information géographique
Site 1
Type de plateformeIn Situ Land-based Platforms > GROUND-BASED OBSERVATIONS
Longitude minimale (°)-3.98Longitude maximale (°)-3.98
Latitude maximale (°)5.33Latitude minimale (°)5.33
Paramètre mesuré
Nom du paramètreNon-methane Hydrocarbons/Volatile Organic Compounds
Mot-clé du paramètreAtmosphere > Atmospheric Chemistry > Carbon and Hydrocarbon Compounds > Non-methane Hydrocarbons/Volatile Organic Compounds
Unitémicrogramm per cubic meter - µg.m-3
Date de début (yyyy-mm-dd)Date de fin (yyyy-mm-dd)
Précision du capteur / Incertitude
Information sur l'utilisation des données
Conditions d'utilisation des donnéesIn case the data are used in research and publications we would appreciate when the following statement is added: "The research leading to these results has received funding from the European Union Seventh Framework Programme FP7/2007-2013) under grant agreement n° 603502." We would welcome data users to offer co-authorship to the data producers in case that the data make a substantial contribution to a publication. Please contact the main data PI to discuss this.
Charte d'accès aux donnéesCreative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License
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