Table 2: Kinetics of the Hg photoreduction and its MDF and MIF isotope fractionation dependent on the Hg/DOC ratio.

Hg/DOC (ng/mg)% of Hg reacted during the first hourFractionation factors (1000( 1 𝛼 ))
for 200Hg/198Hg (MDF)For 201Hg/198Hg (MIF)

34.65%0.362.73
1678%0.284.07
83310%0.535.01
833050%0.502.21