Heavy Metals in Stream Sediments, northern Mainland of Nova Scotia

1959 ◽  
Author(s):  
R H C Holman
Keyword(s):  
Heavy Metals ◽  
Nova Scotia ◽  
Stream Sediments

scholarly journals Geochemistry, risk assessment, and Pb isotopic evidence for sources of heavy metals in stream sediments around the Ulukışla Basin, Niğde, southern Turkey

2020 ◽  
Vol 29 (7) ◽  
pp. 1167-1188 ◽  
Author(s):  
Abdurrahman LERMİ ◽  
Emmanuel Daanoba SUNKARI
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Anthropogenic Activities ◽  
Pollution Assessment ◽  
Potential Ecological Risk ◽  
Stream Sediments ◽  
Multivariate Statistical ◽  
Isotopic Tracing ◽  
South Central ◽  
Probable Effect

Concentrations of selected elements (Al, Fe, Mn, Mo, As, Cd, Cu, Cr, Ni, Co, Pb, Sb, and Zn) and Pb isotope ratios were determined in 53 sediments from Alihoca, Gümüş, Horoz, and Çakıt streams around the south-central Taurides (Ulukışla Basin), Niğde, which is a known mining province in Turkey. Several pollution and risk assessment indices were used to assess possible heavy metal pollution in the stream sediments and the associated potential ecological risks. Concentrations of As, Cd, Cu, Cr, Ni, Co, Pb, Sb, and Zn were elevated in the streams located near ancient mines, active mines, and slag piles in the area, suggesting an influence from mining activities. The pollution assessment indices indicated that the sediments were significantly polluted by As, Cd, Sb, Zn, and Pb and moderately polluted by Cu, Ni, Cr, and Co. The sediments show very high potential ecological risk with As, Cd, Sb, and Pb as the principal contributors. Ni, Cr, As, Pb, Zn, and Cd exceeded the probable effect concentrations in most of the samples implying that their concentrations may frequently affect sediment-dwelling organisms. Multivariate statistical analyses indicate that the accumulation of heavy metals in the stream sediments is due to an interplay of anthropogenic activities (mining and agrochemical application) and geogenic processes (weathering of bedrocks and supergene alteration of base metal-rich mineralization). Pb isotopic tracing indicates that total Pb in the sediments (206Pb/207Pb = 1.09–1.29) is primarily from weathering and dissolution of ultrapotassic rocks (206Pb/207Pb up to 1.20) and galena (206Pb/207Pb up to 1.21) from the Pb-Zn-Au deposits in the area with some anthropogenic input from mine slag piles (206Pb/207Pb = 1.10).

Geochemical Distribution of Selected Heavy Metals in Stream Sediments Affected by Tannery Activities

2006 ◽  
Vol 169 (1-4) ◽  
pp. 167-184 ◽  
Author(s):  
Maria Lucia Kolowski Rodrigues ◽  
Milton Luiz Laquintinie Formoso
Keyword(s):  
Heavy Metals ◽  
Stream Sediments
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