Volume 41, Issue 1, November 2023, Pages 71–78
Engambé Christ Bardoul1, Tchoumou Martin2, Ifo Grace Mazel3, Louzayadio Mvouezolo Félicien Raison4, Ngoro-Elenga Ferland5, Atipo Ngopo Frenand6, and Moussoki Nsona Promesse7
1 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
2 Unity of Plant and life chemistry, Faculty of Sciences and Technology, Marien NGOUABI University, Brazzaville, Republic of the Congo
3 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
4 Unity of Plant and Life chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
5 Laboraoty of inorganic chemistry, Faculty of Sciences and Technology, Marien NGOUABI University, Brazzaville, Republic of the Congo
6 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
7 Unity of Plant and Life chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
Original language: English
Copyright © 2023 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.
This study evaluates the contamination by heavy metals of the grounds taken in four of the public landfills in the districts of Brazzaville. Soil samples taken at a depth of 25 cm first underwent some physical treatment (drying, sieving and grinding) before undergoing physicochemical analyzes and determination of heavy metals by ICP-OES. Physicochemical analyzes showed that Landfill soils are heavily contaminated with heavy metals: lead (Pb), chromium (Cr), cobalt (Co), nickel (Ni), mercury (Hg) and zinc (Zn). The highest levels of these heavy metals are as follows: lead (220 mg/kg) in the soils of the Tsiémé landfill; chromium (13000 mg/kg), cobalt (160 mg/kg), nickel (7500 mg/kg) and zinc (12000 mg/kg) in the soils of the Diata landfill and mercury (0.66 mg/kg) in the soils of the Moukondo landfill. Mercury is also present in these four landfills but in small quantities.
Author Keywords: Landfills, Soilss, Heavy metals, Brazzaville.
Engambé Christ Bardoul1, Tchoumou Martin2, Ifo Grace Mazel3, Louzayadio Mvouezolo Félicien Raison4, Ngoro-Elenga Ferland5, Atipo Ngopo Frenand6, and Moussoki Nsona Promesse7
1 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
2 Unity of Plant and life chemistry, Faculty of Sciences and Technology, Marien NGOUABI University, Brazzaville, Republic of the Congo
3 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
4 Unity of Plant and Life chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
5 Laboraoty of inorganic chemistry, Faculty of Sciences and Technology, Marien NGOUABI University, Brazzaville, Republic of the Congo
6 Laboratory of inorganic chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
7 Unity of Plant and Life chemistry, Faculty of Sciences and Technology, Marien N’GOUABI University, Brazzaville, Republic of the Congo
Original language: English
Copyright © 2023 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
This study evaluates the contamination by heavy metals of the grounds taken in four of the public landfills in the districts of Brazzaville. Soil samples taken at a depth of 25 cm first underwent some physical treatment (drying, sieving and grinding) before undergoing physicochemical analyzes and determination of heavy metals by ICP-OES. Physicochemical analyzes showed that Landfill soils are heavily contaminated with heavy metals: lead (Pb), chromium (Cr), cobalt (Co), nickel (Ni), mercury (Hg) and zinc (Zn). The highest levels of these heavy metals are as follows: lead (220 mg/kg) in the soils of the Tsiémé landfill; chromium (13000 mg/kg), cobalt (160 mg/kg), nickel (7500 mg/kg) and zinc (12000 mg/kg) in the soils of the Diata landfill and mercury (0.66 mg/kg) in the soils of the Moukondo landfill. Mercury is also present in these four landfills but in small quantities.
Author Keywords: Landfills, Soilss, Heavy metals, Brazzaville.
How to Cite this Article
Engambé Christ Bardoul, Tchoumou Martin, Ifo Grace Mazel, Louzayadio Mvouezolo Félicien Raison, Ngoro-Elenga Ferland, Atipo Ngopo Frenand, and Moussoki Nsona Promesse, “Evaluation of contamination by heavy metals in soils collected from four public landfills in Brazzaville, Republic of Congo,” International Journal of Innovation and Applied Studies, vol. 41, no. 1, pp. 71–78, November 2023.
