The Hg spatial distribution reveals a very local contamination and a limited downstream dispersion of the contaminant. The high Hg concentrations obtained at ASGM sites largely exceed the Sediment Quality Guidelines (SQGs) and the Probable effect concentration (PEC) for the Protection of Aquatic Life recommendation. Our results demonstrate that the ASGM activities discharged large amounts of Hg into the Gambia River ecosystem and that the accumulation of Hg in sediments may represent a significant human health risk and a potential source of toxicity for aquatic organisms.
http://sciencealerts.com/stories/2803252/Effect_of_recent_artisanal_smallscale_gold_mining_on_the_contamination_of_surface_river_sediment_Case_of_Gambia_River_Kedougou_region_southeastern_Senegal.html
No comments:
Post a Comment