Impact of abandoned mine tailings on the arsenic concentrations in Moira Lake, Ontario

Levels, trends and risk assessment of arsenic pollution in Yangzonghai Lake, Yunnan Province, China

“…(arsenic concentration: 10000-20000 g/L, pH 9.5-10) [7], Union Lake in southern New Jersey (2780 g/L) [8,9], water bodies in Ghana which was influenced by gold mining [10], and a series of subarctic lakes near Yellowknife, Northwest Territories, Canada (average level, 270 g/L, range of concentration, 64-530 g/L) [11]. The arsenic concentrations in the lake water of Yangzonghai were higher than those in Manchar Lake in Pakistan (35-157 g/L) [12], Moira Lake in Canada (35-100 g/L) [13], etc., indicating that there was serious contamination in Yangzonghai.…”

Multi-trophic level response to extreme metal contamination from gold mining in a subarctic lake

“…In Canada, historic gold mining represents one of the major sources of arsenic contamination to the environment because many recoverable gold deposits are found in arsenic bearing sulfide deposits [9]. Elevated arsenic and metal concentrations have been linked to mine drainage and emissions from gold mining in Ontario [14], Nova Scotia [15,16], British Columbia [17] and the Northwest Territories [18,19]. Despite the widespread documentation of arsenic contamination in aquatic environments, relatively little is known about the long-term ecological impacts of arsenic exposure.…”

Arsenic in Natural Environments

“…The literature contains many other arsenic analyses of mine drainage samples from all over the world, including Mexico (Razo et al, 2004;Mendoza et al, 2006), Montana, USA (Nimick et al, 2003), Arizona, USA (Rösner, 1998), New Mexico, USA (Boulet and Larocque, 1996), South Dakota, USA (May et al, 2001), Colorado, USA (Bednar et al, 2005), Utah, USA (Bednar et al, 2005), Idaho, USA (Bednar et al, 2005), Alaska, USA (Gray and Sanzolone, 1996), Northwest Territories, Canada (Bright, Dodd and Reimer, 1996), British Columbia, Canada Crusius et al, 2003), Ontario, Canada (Azcue and Nriagu, 1995;Ross, Bain and Blowes, 1999), Manitoba, Canada (Moncur et al, 2002), Saskatchewan, Canada (Donahue and Hendry, 2003;Moldovan, Hendry and Jiang, 2001), Spain (Loredo et al, 2004;Loredo et al, 1999;Loredo et al, 2003), France (Migon and Mori, 1999;Bodénan et al, 2004), Río Pilcomayo of Bolivia-Paraguay-Argentina (Hudson-Edwards et al, 2001;Archer et al, 2005), Argentina (Williams, 2001), Tunisia (Jdid et al, 1999), Sweden (Sjöblom, Håkansson and Allard, 2004), Ecuador (Williams, 2001;Appleton et al, 2001), Germany (Zänker et al, 2002;Jakubick, Jenk and Kahnt, 2002), Australia (Ashley et al, 2003), Slovak Republic (Klukanová andRapant, 1999), Republic of Korea Woo and Choi, 2001;Jung, Thornton and Chon, 2002), Poland …”

“…A chemical gradient would then exist at the sediment-water interface, which could allow the arsenic to diffuse upward toward the overlying waters (Figure 3.3; (Azcue and Nriagu, 1995;Martin and Pedersen, 2002;Minami and Kato, 1997;Diamond, 1995)). Although far less common in most waters and sediments than iron compounds, MnO 2 more rapidly oxidizes As(III), especially when the MnO 2 is poorly crystalline and has a high-surface area (Figure 3.3; (Mucci et al, 2000), 315; (Sullivan and Aller, 1996), 1466; (Nicholas et al, 2003), 125; (Stollenwerk, 2003), 70-71).…”