Journal of Environment Pollution and Human Health
ISSN (Print): 2334-3397 ISSN (Online): 2334-3494 Website: Editor-in-chief: Dibyendu Banerjee
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Journal of Environment Pollution and Human Health. 2021, 9(2), 27-35
DOI: 10.12691/jephh-9-2-1
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Physicochemical Characteristics and Heavy Metals Contamination Assessment in Water and Sediment in a Tropical Hydroelectric Dam of Sassandra River, Côte d’Ivoire

Dimitri Ekissi1, Kakou Charles Kinimo2, , Tanoh Marius Kamelan1 and Essétchi Paul Kouamelan1

1Université Félix Houphouët Boigny, UFR Biosciences, Laboratoire des milieux naturels et conservation de la biodiversité, Abidjan, Côte d’Ivoire

2Université Peleforo Gon coulibaly, département de Mathématiques Physique Chimie, Korhogo, Côte d’Ivoire

Pub. Date: June 25, 2021

Cite this paper:
Dimitri Ekissi, Kakou Charles Kinimo, Tanoh Marius Kamelan and Essétchi Paul Kouamelan. Physicochemical Characteristics and Heavy Metals Contamination Assessment in Water and Sediment in a Tropical Hydroelectric Dam of Sassandra River, Côte d’Ivoire. Journal of Environment Pollution and Human Health. 2021; 9(2):27-35. doi: 10.12691/jephh-9-2-1


Buyo hydroelectric dam is one of the highest concrete rock-filled dams in Côte d’Ivoire. This paper presents results of physicochemical parameters in water supply, heavy metals concentrations, and ecological risks in sediment from Buyo hydroelectric dam. In-situ measurement of physicochemical parameters of water and sediment samples were collected in 3 stations along the reservoir from April 2018 to March 2019. The sediment samples have been acidic digested and metal concentrations were analyzed using an atomic absorption spectrophotometer and mercury analyzer. Results indicated that conductivity, oxygen content, temperature, nitrite, and chloride were within the limits established by WHO for potable water, while pH was acidic. The Pearson correlation indicated a strong positive correlation and significant linear relation between various pairs physicochemical parameters. In comparison with upper continental crust concentrations, all heavy metals in sediments showed high concentrations in the upstream than the downstream and pristine stations, with exception of Cu. The geo-accumulation (Igeo) and enrichment factor (EF) indices used indicate that sediments were classified as uncontaminated according to Zn and Mn concentrations and they have a lithogenic source. Whereas, Igeo and EF values of Hg and Cu showed that the sediments lie in the range of moderate to heavily contaminated, suggesting anthropogenic inputs on these metal levels. Except for Hg, which had high ecological risks, Cu, Zn, and Mn pose a low ecological risk. This study provides an insight into water qualities and risk assessment of environmental pollution and important outputs for decision-makers to set policy for resources management.

heavy metals water sediments hydroelectric dam ecological risk

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