Mercury (Hg) speciation in natural waters is controlled by redox conditions and microbiological activity. Water columns of meromictic lakes have large stable chemical biological gradients that allow the investigation many Hg transformations. In this study, (elemental = Hg0, methylated MeHg) partitioning between truly dissolved (<3 kDa), colloidal (<0.45 ?m >3 particulate (>0.45 ?m) fractions, w...

The organic-rich shales found in the Wufeng–Longmaxi Formation are typically deposited oxygen-deficient reducing environments. One of primary sources debate revolves around question whether anoxic bottom water these is either euxinic or ferruginous, and this matter remains unresolved. Previous studies have mostly focused on as a whole order to understand key factors that control organic accumul...