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Total mercury levels in nine species of freshwater fish from two hydroelectric reservoirs and a crater lake in Ghana
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Total mercury levels in nine species of freshwater fish from two hydroelectric reservoirs and a crater lake in Ghana
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Journal Article
Total mercury levels in nine species of freshwater fish from two hydroelectric reservoirs and a crater lake in Ghana
2009
Overview
Total mercury (Hg) concentrations were determined in the muscle tissue of fish from three reservoirs in Ghana, namely, Lake Bosomtwi, Kpong and Akosombo Hydroelectric Reservoirs. A total of 165 fish samples covering nine species were collected and analysed for total mercury. A mixture of HNO₃, H₂SO₄ and HClO₄ were used for complete oxidation of organic tissues. Hg was detected by the Cold Vapour Atomic Absorption Spectrometry technique using an automatic mercury analyzer. Total mercury concentrations in μg g ⁻ ¹ (wet weight) ranged from below 0.001 to 0.070 for fish from Lake Bosomtwi, 0.010 to 0.275 for fish from Kpong Reservoir and from below 0.001 to 0.042 for fish from Akosombo Reservoir. All the results obtained are below the World Health Organization limit of 0.5 μg g ⁻ ¹. The low levels of total mercury obtained in this study suggest that the three aquatic environments have not been significantly impacted by mercury contamination.
Publisher
Dordrecht : Springer Netherlands,Springer Netherlands,Springer,Springer Nature B.V
Subject
/ Akosombo
/ analysis
/ Animal, plant and microbial ecology
/ Animals
/ Atmospheric Protection/Air Quality Control/Air Pollution
/ atomic absorption spectrometry
/ Atomic absorption spectroscopy
/ Biological and medical sciences
/ Earth and Environmental Science
/ Ecology
/ Ecotoxicology, biological effects of pollution
/ Effects of pollution and side effects of pesticides on vertebrates
/ Environmental Monitoring - methods
/ fish
/ Fishes
/ Fundamental and applied biological sciences. Psychology
/ Ghana
/ Kpong
/ Lakes
/ Mercury
/ methods
/ Monitoring/Environmental Analysis
/ Studies
/ Water Pollutants, Chemical - analysis
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