EVALUATION DE LA CONCENTRATION DES ELEMENTS TRACES (Pb, Cu, Zn, Fe, Cd et Hg) DANS LES CREVETTES (macrobrachium vollenhovenii) DES LAGUNES AGHIEN ET POTOU (SUD-EST DE LA CÔTE D’IVOIRE)
Journal Title: Larhyss Journal - Year 2015, Vol 24, Issue 24
Abstract
This study aims to determine the concentrations of heavy metals (Cu, Pb, Fe, Cd, Zn and Hg) in prawns (Macrobrachium vollenhovenii) of lagoons Aghien and Potou in order to protect population’s heath. Nitric acid was added to every sample of water. Sediments samples were mineralized with hydrofluoric acid (HF) and aqua regia (HNO3: HCl; 1:3, v/v). Prawns samples were mineralized with nitric acid (HNO3) and hydrogen peroxide (H2O2). Then, all samples were analyzed with atomic absorption spectrometer (AAS) SpectrAA 110. Using AAS allowed showing that in lagoons waters the average concentrations of Pb (19.17 ± 1.93 µg/L) and Fe (2640.09 ± 256.22 µg/L) are higher than WHO standards. The average concentration of Cu (61.57 ± 19.36 mg/kg), Fe (63223.57 ± 5244.81 mg/kg) and Hg (1.77 ± 0.08 mg/kg) in lagoons sediments are superior to the concentrations of not polluted sediments. The average concentration of heavy metals in prawns are 0.34 ± 0.05 mg/kg, 0.02 ± 0.01 mg/kg, 1.12 ± 0.29 mg/kg, 0.04 ± 0.003 mg/kg, 2.21 ± 0.33 mg/kg and 0.71 ± 7.62 mg/kg respectively for Pb, Cd, Cu, Zn, Fe and Hg. 27 ± 7.4% of prawns are contaminated by lead, 24 ± 7.15% by cadmium, 38 ± 8.08% by copper, 70 ± 7,62% by iron and 76 ± 7.15% by mercury. All the analyzed prawns are unfit for human consumption. Bioconcentration factors show that heavy metals found in prawns come from waters and sediments as well as food they consume. Heavy metals which affect prawns habitats have natural and anthropogenic springs. Heavy metal accumulation can cause several diseases and dysfunctions of human body.
Authors and Affiliations
TRAORE A. | Laboratoire des Sciences et Techniques de l’Eau et de l’Environnement, UFR des Sciences de la terre et des ressources Minières 22 BP 582 Abidjan 22, Université Félix Houphouët Boigny de Cocody, Abidjan, Côte D’Ivoire, AKE-ASSI Y. | Laboratoire Central pour l’Hygiène Alimentaire et l’Agro-industrie, LANADA, Ministère de l’Agriculture, 04 BP 612 Abidjan 04, Côte d’Ivoire, AHOUSSI KOUASSI E. | Laboratoire des Sciences et Techniques de l’Eau et de l’Environnement, UFR des Sciences de la terre et des ressources Minières 22 BP 582 Abidjan 22, Université Félix Houphouët Boigny de Cocody, Abidjan, Côte D’Ivoire, SORO N. | Laboratoire des Sciences et Techniques de l’Eau et de l’Environnement, UFR des Sciences de la terre et des ressources Minières 22 BP 582 Abidjan 22, Université Félix Houphouët Boigny de Cocody, Abidjan, Côte D’Ivoire
Keywords
Related Articles
- EP ID EP15178
- DOI -
- Views 340
- Downloads 16
A SUBMERGED FLEXIBLE CURTAIN IN THE RESERVOIR TO REDUCE THE NUTRIENT
Pre-dams of optimum size normally located upstream of reservoirs have proven effective in phosphorus load reduction due to sedimentation of allochthonous and autochthonous seston. In order to achieve similar effects, m...
ELIMINATION DU PLOMB PAR ADSORPTION SUR LE KAOLIN
The objective of this study is to test the effectiveness of kaolin for the retention of lead in synthetic solutions. The results we obtained showed that the kinetics of retention of lead (10 mg/l) is very short. Equili...
FIRST APPLICATION OF THE COP METHOD TO VULNERABILITY MAPPING IN THE MEFFROUCH CATCHMENT (NORTHWEST OF ALGERIA)
This paper presents the first application of the COP method for the vulnerability mapping in Mefrouch catchment (Tlemcen, Algeria). This method has been developed for the intrinsic vulnerability of carbonates aquifers...
ETUDE D’IMPACT DES EAUX USÉES DE LA VILLE DE TAOURIRT SUR LA QUALITÉ PHYSICO-CHIMIQUE DES EAUX DE L’OUED ZA
The main goal of this work is the study of the physicochemical qualities of superficial water in the inferior portion of Za River which suffers from the effect of domestic, industrial and agricultural waste waters from...
ETUDE DE LA CINETIQUE D’ADSORPTION DU PHOSPHORE EN SOLUTION SUR LES SEDIMENTS DU LAC FOUARAT AU MAROC
Le présent travail consiste à déterminer la cinétique d’adsorption du phosphore sous forme d’anions orthophosphates sur les sédiments superficiels, prélevés au niveau du lac Fouarat, près des rejets d’eau...