Assessment of Selenium Contamination in Sediments of the Aby and Tendo Lagoons in Côte d’Ivoire  

作　　者：Stéphane Jean Claon Kouakou Serge Kouassi Kossonou Roland N’Guettia M’bassidjé Arsène Seka Guei Jokebed Dakouo Allico Joseph Djaman Kouakou Luc Kouadio Stéphane Jean Claon;Kouakou Serge Kouassi;Kossonou Roland N’Guettia;M’bassidjé Arsène Seka;Guei Jokebed Dakouo;Allico Joseph Djaman;Kouakou Luc Kouadio(Analytical Sciences and Public Health Department, University of Fé,lix Houphouë,t-Boigny, Abidjan, Cô,te d’,Ivoire;Water Quality Control and Analysis Laboratory (LACQUE), Office National de l’,Eau Potable (ONEP), Abidjan, Cô,te d’,Ivoire;Biology and Health Laboratory, University of Fé,lix Houphouë,t-Boigny, Abidjan, Cô,te d’,Ivoire;Laboratory of Environmental Sciences (LSE), University of Nangui Abrogoua, Abidjan, Cô,te d’,Ivoire;Department of Medical and Fundamental Biochemistry, Institut Pasteur of Cô,te d’,Ivoire, Abidjan, Cô,te d’,Ivoire)

机构地区：[1]Analytical Sciences and Public Health Department, University of Fé,lix Houphouë,t-Boigny, Abidjan, Cô,te d’,Ivoire [2]Water Quality Control and Analysis Laboratory (LACQUE), Office National de l’,Eau Potable (ONEP), Abidjan, Cô,te d’,Ivoire [3]Biology and Health Laboratory, University of Fé,lix Houphouë,t-Boigny, Abidjan, Cô,te d’,Ivoire [4]Laboratory of Environmental Sciences (LSE), University of Nangui Abrogoua, Abidjan, Cô,te d’,Ivoire [5]Department of Medical and Fundamental Biochemistry, Institut Pasteur of Cô,te d’,Ivoire, Abidjan, Cô,te d’,Ivoire

出　　处：《International Journal of Geosciences》2024年第4期334-349,共16页地球科学国际期刊（英文）

摘　　要：Selenium is a trace element that can have both beneficial and harmful effects on aquatic life. The Aby Lagoon is a coastal environment in Côte d’Ivoire that receives selenium inputs from various natural and anthropogenic sources. The aim of this study was to assess the levels of selenium in the sediments of the Aby Lagoon and its tributaries, the Tanoe River and the Tendo Lagoon, and to examine the spatial and seasonal variations of selenium concentrations. Sediment samples were collected from different sites and seasons, and selenium concentrations were measured by atomic fluorescence spectrometry. The results showed that the average concentration of selenium in the sediments of the Aby Lagoon was 0.82 mg/kg, indicating moderate contamination. The concentration of selenium varied between sites and seasons, with higher values in the channel of the Tendo Lagoon and during the dry season. The study highlighted the complexity of selenium dynamics in aquatic ecosystems, and the need to take into account seasonal and spatial variability as well as interactions between environmental factors. The study also suggested potential ecotoxicological risks for some sensitive organisms in certain areas of the lagoon. This study contributes to the knowledge of the dynamics of selenium in lagoon ecosystems and to the assessment of the environmental risks associated with its presence.Selenium is a trace element that can have both beneficial and harmful effects on aquatic life. The Aby Lagoon is a coastal environment in Côte d’Ivoire that receives selenium inputs from various natural and anthropogenic sources. The aim of this study was to assess the levels of selenium in the sediments of the Aby Lagoon and its tributaries, the Tanoe River and the Tendo Lagoon, and to examine the spatial and seasonal variations of selenium concentrations. Sediment samples were collected from different sites and seasons, and selenium concentrations were measured by atomic fluorescence spectrometry. The results showed that the average concentration of selenium in the sediments of the Aby Lagoon was 0.82 mg/kg, indicating moderate contamination. The concentration of selenium varied between sites and seasons, with higher values in the channel of the Tendo Lagoon and during the dry season. The study highlighted the complexity of selenium dynamics in aquatic ecosystems, and the need to take into account seasonal and spatial variability as well as interactions between environmental factors. The study also suggested potential ecotoxicological risks for some sensitive organisms in certain areas of the lagoon. This study contributes to the knowledge of the dynamics of selenium in lagoon ecosystems and to the assessment of the environmental risks associated with its presence.

关 键 词：Tropical Estuarine SELENIUM SEDIMENTS Aby Lagoon Seasonal Distribution 

分 类 号：P59[天文地球—地球化学]