Speciation and bioavailability of mercury in sediments impacted by gold mining in Colombia

Speciation and bioavailability of mercury in sediments impacted by gold mining in Colombia

•The impact of gold mining was studied in sediments in the Mojana region, Colombia.•MeHg correlated significantly with T-Hg and organic matter, being a 2.6% of T-Hg.•Mercury exists mostly as the fraction associated with organic Hg (Hg-o, 48.4%).•Exchangeable phases (Hg-w, Hg-h) show significant corr...

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Veröffentlicht in:Chemosphere (Oxford) 2015-01, Vol.119, p.1289-1295
Hauptverfasser: Pinedo-Hernandez, Jose, Marrugo-Negrete, Jose, Diez, Sergi
Format: Artikel
Sprache:eng
Schlagworte:
Bioaccumulation
Bioavailability
Biological Availability
Chemical Fractionation
Colombia
Fractionation
Gastric Acid - chemistry
Geologic Sediments - analysis
Gold
Gold mining
Mercury
Mercury (metal)
Mercury - analysis
Mercury - chemistry
Methylmercury
Methylmercury Compounds - analysis
Methylmercury Compounds - chemistry
Mining
Rivers
Sampling
Sediments
Speciation
Water - chemistry
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
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Zusammenfassung:•The impact of gold mining was studied in sediments in the Mojana region, Colombia.•MeHg correlated significantly with T-Hg and organic matter, being a 2.6% of T-Hg.•Mercury exists mostly as the fraction associated with organic Hg (Hg-o, 48.4%).•Exchangeable phases (Hg-w, Hg-h) show significant correlations with MeHg content.•Although their low percentage (
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2014.09.044