2006
DOI: 10.1016/j.aca.2005.10.070
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A new method for the investigation of mercury redox chemistry in natural waters utilizing deflatable Teflon® bags and additions of isotopically labeled mercury

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Cited by 42 publications
(34 citation statements)
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“…The photoreduction of Hg II in the presence of dissolved organic matter (DOM) has been widely documented in various natural water systems [86][87][88][89][90] and may also occur in atmospheric droplets and organic aerosols (OA) [91]. Recent model studies by Horowitz et al supported the occurrence of the reduction of Hg II -organic complexes in the atmosphere.…”
Section: Photoreduction Of Hg II -Organic Complexesmentioning
confidence: 92%
“…The photoreduction of Hg II in the presence of dissolved organic matter (DOM) has been widely documented in various natural water systems [86][87][88][89][90] and may also occur in atmospheric droplets and organic aerosols (OA) [91]. Recent model studies by Horowitz et al supported the occurrence of the reduction of Hg II -organic complexes in the atmosphere.…”
Section: Photoreduction Of Hg II -Organic Complexesmentioning
confidence: 92%
“…Because of the attenuation of UV radiation with depth in the water column, both photoreduction and photooxidation decline with increasing depth. Moreover, in coastal and marine systems, because of the presence of chloride, photoreduction is hampered and, in the absence of an alternative pathway for Hg(0) production, oxidation reactions may be prevalent and likely more significant than evasion in controlling the fate of Hg(0) (1,3,63). Microbial reduction can account for a significant component of the mercury redox cycling in coastal marine systems from temperate zones [up to 20% of the pool of Hg (0)] (51), although the mechanisms involved remain unknown.…”
Section: Discussionmentioning
confidence: 99%
“…Photochemical rates of reduction and oxidation were based on previously published data for temperate coastal marine systems and ranged from 0.1 h Ϫ1 to 1.4 h Ϫ1 for photooxidation (33,34,63) and from 0.4 h Ϫ1 to 1.58 h Ϫ1 for photoreduction (1,63). UV energy attenuation was calculated using an empirical model based on dissolved organic carbon concentrations used for Arctic ocean waters (25).…”
Section: Methodsmentioning
confidence: 99%
“…Hg II also strongly binds to organic ligands, including to reduced sulfur complexes and carboxyl groups Haitzer et al, 2002;Ravichandran, 2004;Zheng and Hintelmann, 2009). Photoreduction of Hg II bound to dissolved organic carbon (DOC) and other organic matter has been widely reported in aquatic environments (Amyot et al, 1994;Xiao et al, 1995;O'Driscoll et al, 2006;Whalin and Mason, 2006) and could also possibly take place in organic aerosols (OA). Bash et al (2014) found that including incloud aqueous photoreduction via organic acids based on the mechanism proposed by Si and Ariya (2008) improved the simulation of Hg wet deposition in their regional air quality model.…”
Section: Introductionmentioning
confidence: 99%