[ Evaluation de la contamination atmosphérique par les éléments chimiques inorganiques contenus dans les PM 10: Cas de la ville de KOLWEZI ]
Volume 75, Issue 2, November 2024, Pages 214–234
Patrick MBWEB KATSHIL1 and Bavon Ndala Mbavu2
1 Commissariat Général à l’Energie Atomique, Ministère de la Recherche Scientifique, Lubumbashi, RD Congo
2 Assistant à Institut Supérieur des Techniques Appliquées ISTA-KOLWEZI, RD Congo
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The evaluation of atmospheric contamination by metallic trace elements in a given environment is carried out by several techniques and methods that can make it possible to retain certain inorganic and organic chemical elements that we find in our environment. This work allowed us to characterize the samples of aerosols collected from different places in the city of Kolwezi using the aerodynamic principle to sample them from a Dichotomous type device. During our research, we sampled twice a day; in the mornings and afternoons for a period of 2 hours per sampling. As a result of industrial and artisanal mining activities releasing gaseous, liquid and solid waste into the environment associated with natural phenomena which at times concentrate contamination depending on the weather related to sudden climate change; we opted for a study based on the evaluation of atmospheric contamination by inorganic chemical elements contained in the PM 10 cases of the city of Kolwezi using portable X-ray fluorescence as a non-destructive analysis technique for aerosols fixed on the filter paper and as gravimetric sampling methods for collecting aerosols by impacting on filter paper. After analyzing the filters, we noticed that all the districts of the city that were the subject of our study have an excessive concentration of air particles with a size of less than 10 microns. The results obtained after the sampling work shows that the concentration of the particles sampled is 52 times greater than that published in 2012 by the WHO (i.e. 2623.524 micrograms/m3 in 2 hours of PM 10 particles which are greater than the limit value of the WHO, i.e. 50 microgram/m3). And after chemical analysis, we detected the following elements: Si, Mg, Al, Fe, Ca, Cu, Co, P, Zn, Cl, Rb, Sr, Zr, Nb, Mo, Pd, Ag, Cd, P, Col, K, Sb, Re, Mb, Cu.
Author Keywords: sampling, contamination, inorganic chemical elements.
Volume 75, Issue 2, November 2024, Pages 214–234
Patrick MBWEB KATSHIL1 and Bavon Ndala Mbavu2
1 Commissariat Général à l’Energie Atomique, Ministère de la Recherche Scientifique, Lubumbashi, RD Congo
2 Assistant à Institut Supérieur des Techniques Appliquées ISTA-KOLWEZI, RD Congo
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The evaluation of atmospheric contamination by metallic trace elements in a given environment is carried out by several techniques and methods that can make it possible to retain certain inorganic and organic chemical elements that we find in our environment. This work allowed us to characterize the samples of aerosols collected from different places in the city of Kolwezi using the aerodynamic principle to sample them from a Dichotomous type device. During our research, we sampled twice a day; in the mornings and afternoons for a period of 2 hours per sampling. As a result of industrial and artisanal mining activities releasing gaseous, liquid and solid waste into the environment associated with natural phenomena which at times concentrate contamination depending on the weather related to sudden climate change; we opted for a study based on the evaluation of atmospheric contamination by inorganic chemical elements contained in the PM 10 cases of the city of Kolwezi using portable X-ray fluorescence as a non-destructive analysis technique for aerosols fixed on the filter paper and as gravimetric sampling methods for collecting aerosols by impacting on filter paper. After analyzing the filters, we noticed that all the districts of the city that were the subject of our study have an excessive concentration of air particles with a size of less than 10 microns. The results obtained after the sampling work shows that the concentration of the particles sampled is 52 times greater than that published in 2012 by the WHO (i.e. 2623.524 micrograms/m3 in 2 hours of PM 10 particles which are greater than the limit value of the WHO, i.e. 50 microgram/m3). And after chemical analysis, we detected the following elements: Si, Mg, Al, Fe, Ca, Cu, Co, P, Zn, Cl, Rb, Sr, Zr, Nb, Mo, Pd, Ag, Cd, P, Col, K, Sb, Re, Mb, Cu.
Author Keywords: sampling, contamination, inorganic chemical elements.
Abstract: (french)
L’évaluation de la contamination atmosphérique par les éléments Chimiques inorganiques dans un environnement donné s’effectue par plusieurs techniques et méthodes pouvant permettre de retenir certains éléments chimiques inorganiques et organiques que nous retrouvons dans notre milieu. Ce travail nous a permis de caractériser les échantillons des aérosols récoltés sur différents endroits de la ville de Kolwezi en utilisant le principe aérodynamique pour échantillonner à partir d’un appareil de type Dichotomous. Lors de nos recherches, nous avons effectué deux échantillonnages par jour; dans les avants et après-midis pour une durée de 2 heures par échantillonnage. Suite aux activités minières industrielles et artisanales rejetant des déchets gazeux, liquides et solides dans l’environnement associé aux phénomènes naturels qui concentrent par moment la contamination suivant le temps liés au changement brusque du climat; nous avons opté pour une étude basée sur l’évaluation de la contamination atmosphérique par les éléments Chimiques inorganiques contenus dans les PM 10 (cas de la ville de Kolwezi) en utilisant la fluorescence-X portable comme technique d’analyse non destructives des aérosols fixés sur le papier filtre et comme méthodes d’échantillonnage par gravimétrie permettant de récolter des aérosols par impactassions sur un papier filtre. Après analyses des filtres, nous avons remarqué que, tous les quartiers de la ville ayant fait objet de notre étude ont une concentration excessive des particules de l’air ayant une dimension inférieure à 10 microns. Les résultats obtenus après les travaux d’échantillonnages montre que la concentration des particules échantillonnées est 52 fois plus grande que celle publiées en 2012 par l’OMS (soit 2623,524 microgramme/m3 en 2 heures des particules PM 10 qui soient supérieures à la valeur limite de l’OMS soit 50 microgramme/m3). Et après analyse chimique, nous avons chimiques détectés les éléments ci-après: Si, Mg, Al, Fe, Ca, Cu, Co, P, Zn, Cl, Rb, Sr, Zr, Nb, Mo, Pd, Ag, Cd, P, Col, K, Sb, Re, Mb, Cu.
Author Keywords: échantillonnage, contamination, éléments chimiques inorganiques.
How to Cite this Article
Patrick MBWEB KATSHIL and Bavon Ndala Mbavu, “Assessment of atmospheric contamination by inorganic chemical elements contained in PM 10: Case of the city of KOLWEZI,” International Journal of Innovation and Scientific Research, vol. 75, no. 2, pp. 214–234, November 2024.
