eng Science and Education Publishing Journal of Environment Pollution and Human Health 2334-3494 2024-10-17 12 2 38 46 10.12691/jephh-12-2-4 JEPHH20241224 article Seiny Roger N¡¯dri 1 Amadou Kouyat¨¦ amadoukyte@yahoo.fr 2 Issiaka Sanou 3 N¡¯guessan Jean Louis Kouakou 3 Kouakou S¨¦raphin Konan 3 Nina Lydie Amon 4 Leygnima Yaya Ouattara 5 Mougo Andr¨¦ Tigori 5 Ali Sanou 5 5 Brou Dibi 5 Laboratoire des Sciences Physiques Fondamentales et Appliqu¨¦es (LSPFA), Ecole Normale Sup¨¦rieure (ENS), 08 BP 10 Abidjan, C?te d¡¯Ivoire Laboratoire des Sciences et Technologies de l¡¯Environnement (LSTE), Universit¨¦ Jean Lorougnon Gu¨¦d¨¦, UFR Environnement, BP 150 Daloa, C?te d¡¯Ivoire Laboratoire de Chimie et Energies Renouvelables (LaCER), Unit¨¦ de Formation et de Recherche en Sciences Exactes et Appliqu¨¦es (UFR/SEA), Universit¨¦ Nazi BONI, Bobo-Dioulasso, B.P. 1091 Bobo 01, Burkina Faso. D¨¦partement de l¡¯Environnement et de la Sant¨¦, Universit¨¦ Institut Pasteur de C?te d¡¯Ivoire (IPCI), 01 BP 490 Abidjan 01, C?te d¡¯Ivoire Laboratoire des Proc¨¦d¨¦s Industriels de Synth¨¨ses, de l¡¯Environnement et des Energies Nouvelles (LAPISEN), Institut National Polytechnique F¨¦lix Houphou?t-Boigny (INP-HB), BP 1313 Yamoussoukro, C?te d¡¯Ivoire The objective of this study is to evaluate the level of metal contamination in the sediments of Lake Bra Kanon (Daloa, West-Central Côte d¡¯Ivoire) by applying pollution indices. Sediment samples were collected and transported to the laboratory for analysis. A total of ten (10) heavy metals, namely Aluminum, Arsenic, Cadmium, Chromium, Copper, Iron, Manganese, Nickel, Lead and Zinc, were measured using an argon plasma ionizing source mass spectrometer (ICP-MS). The recorded values were compared to those of the upper continental crust. The results obtained showed that the sediments are contaminated by cadmium (4.69 ¨C 6.92 mg/kg), copper (53.4¨C 65.2 mg/kg), and manganese. (751.8 ¨C 985 mg/kg). Furthermore, the order of accumulation of the metal charge in the sediments is: D1 > D3 > D2. Environmental assessment of sediment pollution by heavy metals was carried out using contamination factor (CF), degree of contamination (DC), modified degree of contamination (mDC), index of metal pollution (MPI) and pollution load index (PLI). The results of CF (CFCd = 46.9 ¨C 69.2; CFCu = 3.73 ¨C 4.56; CFMn = 1.42 ¨C 1.87), DC (54.73 ¨C 77.63), mDC (5.473 ¨C 7.763) and MPI (5.81 ¨C 8.55) showed that the sediments were polluted. The pollution load index (PLI < 1) indicated that the lake sediments were weakly affected by anthropogenic sources. However, the results reveal signs of the lake's vulnerability. Hence the need to develop strategies for the protection of this aquatic ecosystem. https://pubs.sciepub.com/jephh/12/2/4/jephh-12-2-4.pdf Daloa lake Bra Kanon sediments heavy metals metal pollution indices