Mercury contamination of surface water and fish in a gold mining region (Cuyuni river basin, Venezuela)

2008 ◽  
Vol 33 (2/3) ◽  
pp. 260 ◽  
Author(s):  
A. Garcia Sanchez ◽  
F. Contreras ◽  
M. Adams ◽  
F. Santos
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Gold Mining ◽  
Mercury Contamination ◽  
Mining Region

Sedentary nestlings of Wood Stork as monitors of mercury contamination in the gold mining region of the Brazilian Pantanal

2011 ◽  
Vol 111 (8) ◽  
pp. 1091-1095 ◽  
Author(s):  
Silvia Nassif Del Lama ◽  
Cristiano Dosualdo Rocha ◽  
Wilson Figueiredo Jardim ◽  
Jo-Szu Tsai ◽  
Peter Crawford Frederick
Keyword(s):  
Gold Mining ◽  
Mercury Contamination ◽  
Wood Stork ◽  
Mining Region ◽  
Brazilian Pantanal

Distribution and mobility of mercury in soils of a gold mining region, Cuyuni river basin, Venezuela

2011 ◽  
Vol 92 (4) ◽  
pp. 1268-1276 ◽  
Author(s):  
F. Santos-Francés ◽  
A. García-Sánchez ◽  
P. Alonso-Rojo ◽  
F. Contreras ◽  
M. Adams
Keyword(s):  
River Basin ◽  
Gold Mining ◽  
Mining Region

scholarly journals Arsenic occurrence in water bodies in Kharaa river basin

2018 ◽  
Vol 18 (44) ◽  
pp. 12-19
Author(s):  
Azzaya T ◽  
Burmaa G ◽  
S Alen ◽  
Narangarav T ◽  
Nyamdelger Sh
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Surface Water ◽  
River Basin ◽  
Gold Mining ◽  
Quality Standard ◽  
Anthropogenic Sources ◽  
Water Quality Standard ◽  
Permissible Level ◽  
Wide Range

Distribution of arsenic (As) and its compound and related toxicology are serious concerns nowadays. Gold mining activity is one of the anthropogenic sources of environmental contamination regarding As and other heavy metals. In Mongolia, the most productive gold mining sites are placed in the Kharaa river basin. A hundred water samples were collected from river, spring and deep wells in this river basin. Along with total As and its species-As(III) and As(V), examination of concentration levels of other key parameters, 21 heavy metals with pH, total hardness, electric conductivity, anion and cations, was also carried out. In respect to the permissible limit formulated by the Mongolian National Drinking water quality standard (MNS 0900:2005, As10 µg/l), the present study showed that most of samples were found no contamination. In Kharaa river basin, an average concentration of total As in surface water was 4.04 µg/l with wide range in 0.07−30.30 µg/l whereas it was 2.24 µg/l in groundwater. As analysis in surface water in licensed area of Gatsuurt gold mining showed a mean concentration with 24.90 µg/l presenting higher value than that of value in river basin by 6 orders of magnitude and it was 2 times higher than permissible level as well. In Boroo river nearby Boroo gold mining area, As concentration in water was ranged in 6.05−6.25 µg/l. Ammonia pollution may have present at estuary of Zuunmod river in Mandal sum with above the permissible level described in national water quality standard. Geological formation of the rocks and minerals affected to change of heavy metal concentration, especially As and uranium (U) at spring water nearby Gatsuurt-Boroo improved road.

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