Tracking Airborne Pollution with Environmental Magnetism in A Medium-Sized African City - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Atmosphere Année : 2021

Tracking Airborne Pollution with Environmental Magnetism in A Medium-Sized African City

Daouda Dawaï
  • Fonction : Auteur
  • PersonId : 963651
Mélina Macouin
Sonia Rousse
  • Fonction : Auteur
  • PersonId : 1112231
Jean-François Léon
Merlin Gountié Dedzo
Merlin Gountié Dedzo
  • Fonction : Auteur
Loïc Drigo
  • Fonction : Auteur
  • PersonId : 1112232

Résumé

Abstract: As in other parts of the world, air pollution over West and Central Africa has major health and meteorological impacts. Air quality assessment and its possible sanitary impact have become essential even in medium-sized towns, therefore amplifying the need for easy-to-implement monitoring methods with low environmental impact. We present here the potential of magnetic methods to monitor air quality at street level in the medium-sized city of Maroua (northern Cameroon) affected by dust-laden desert winds. More than five hundred (544) samples of bark and leaves taken from Neem trees in Maroua were analyzed. Magnetic susceptibility, saturation remanence, and S-ratio were found to determine the concentration and nature of magnetic particles. They are dominated by magnetite-like particle signals as a part of particulate emissions due to urban activities, including both traffic, composed of a substantial proportion of motorcycles, and wood burning for food preparation. We show that both bark and leaves from Neem trees are adequate passive bio-recorders. The use of both enables different times and heights to be sampled, allowing for the high-resolution monitoring, in terms of spatialization, of various urban environments. Particle emissions require assessment and screening that could be carried out rapidly and efficiently by magnetic methods on bio-recorders, even in cities impacted by dust-laden wind.
Fichier principal
Vignette du fichier
Dawaï_2021_Tracking_Airborne_Pollution_with_Environmental_Magnetism_in_A_Medium-Sized.pdf (6.66 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03365018 , version 1 (05-10-2021)

Identifiants

Citer

Daouda Dawaï, Mélina Macouin, Sonia Rousse, Jean-François Léon, Merlin Gountié Dedzo, et al.. Tracking Airborne Pollution with Environmental Magnetism in A Medium-Sized African City. Atmosphere, 2021, 12 (10), pp.1281. ⟨10.3390/atmos12101281⟩. ⟨hal-03365018⟩
27 Consultations
49 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More