Inversion of the sign of the magnetic isotope effect of mercury in photolysis of substituted dibenzylmercury

Sources of mercury to San Francisco Bay surface sediment as revealed by mercury stable isotopes

“…While many processes are known to cause MDF of Hg isotopes, only a few processes are known to cause MIF Estrade et al, 2009). MIF is thought to result from either differences in reaction probabilities due to different magnetic spins in even and odd isotopes (magnetic isotope effect) (Buchachenko et al, 2008) or differences in the relationship between nuclear volume and nuclear charge radii between isotopes (nuclear field shift effect) (Schauble, 2007). In the environment, MIF is believed to principally result from photochemical reduction of Hg(II) and MeHg species Zheng and Hintelmann, 2009).…”

Isotopic fractionation during the uptake and elimination of inorganic mercury by a marine fish

“…Two types of isotope fractionations have been observed, namely the massdependent fractionation (MDF) via the nuclear mass selectivity, and the mass-independent fractionation (MIF) via the magnetic isotope effect and the nuclear volume effect (Buchachenko et al, 2008;Schauble, 2007). The preserved MDF and MIF in samples make it possible to apply the Hg isotope ratios to trace the pollution sources, quantify the exposure pathways, and study the Hg behavior in the environment.…”

Evidence for Mass-Independent Fractionation of Mercury Isotopes by Microbial Activities Linked to Geographically and Temporally Varying Climatic Conditions in Arctic and Subarctic Lakes

“…Free radicals, which may be generated either biochemically or by ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 6 abiotic mechanisms such as photochemical reactions, are thought to play a key role in the nuclear spin effect. Experimental evidence has shown that MIF may result from various abiotic processes, including both photochemical and "dark" reduction of Hg(II), evaporation of Hg(0), and the binding of Hg(II) by thiol groups Buchachenko et al 2008;Estrade et al 2009;Zheng andHintelmann 2009, 2010;Sherman et al 2010;Wiederhold et al 2010;Ghosh et al 2013;Kritee et al 2013), as well as biochemical reactions (Buchachenko et al 2004); and indirect evidence for the occurrence of microbially mediated MIF in lakes has been reported repeatedly (Jackson et al 2006a(Jackson et al ,b, 2008(Jackson et al , 2013Jackson and Muir 2012;Jackson 2013).…”