[Reduction and Oxidation of Mercury by Dissolved Organic Matter Under Anaerobic Conditions].

In sediments, wetlands, and flooded paddy soils, natural organic matter (DOM), such as humic acid (HA) and fulvic acid (FA), exist in a reduced state and mediate the reduction of Hg(Ⅱ) and affect the transformation of mercury and geochemical cycles. This study simulated a dark anaerobic environment to study the reduction of Hg(Ⅱ) by reduced HA and FA. Compared to oxidized HA and FA, the reduction capacity of the reduced HA and FA for Hg(Ⅱ) were higher.